Rudely put by fred, but I think seeing the breadboard evolve/build as Brian walks through the stages would be really great to see to help those who don't know how to read a schematic very well. I'm still wrapping my head around schematics and trying to learn electronics, so visual learning is a huge part of my ability to learn something new and hopefully make the leap from "complete noob" to "noob". Seeing the breadboard as it relates to the schematic would be super helpful for my personal learning style, especially with a master builder like Brian walking us through it. Great vid! I hope we see more :)
In a world of self-interest fed by narcissistic social media, here is an expert in his field using the platform to freely share his wisdom and raise us up instead of keep us down. Gives me some faith we might not be extinct in the next ten years. Thank you, Brian!
Not exaggerating when I say I have been CRAVING content like this lmao, so happy to see such an educated breakdown presented in an easily understood format, but with the added plus of being edited and filmed well.
Here's an index to compare sounds in different sections of the video: 0:41 - Input to output (bypass) 1:02 - Input filter only 3:00 - OpAmp 1/3 (gain @ 0%) 3:20 - OpAmp 2/3 (gain @ 50%) 3:45 - OpAmp 3/3 (gain @ 100%) 4:18 - Low pass filter capacitor 5:20 - Clipping diodes 7:46 - Tone improvement via bottom capacitor 1/2 (stock, .22uF) 8:00 - Tone improvement via bottom capacitor 2/2 (1uF) 9:15 - Tone control 1/3 (all treble) 9:40 - Tone control 2/3 (all bass) 10:09 - Tone control 3/3 (sweet spot) 11:02 - Tone control bottom capacitor .047uF 1/4 (somewhere in the middle) 11:19 - Tone control bottom capacitor .047uF 2/4 (all bass) 11:32 - Tone control bottom capacitor .047uF 3/4 (all treble) 12:15 - Tone control bottom capacitor .047uF 4/4 (sweet spot) 13:09 - Tone control bottom capacitor 1uF 1/2 (somewhere in the middle) 13:23 - Tone control bottom capacitor 1uF 2/2 (sweet spot)
Yes - thank you very much Luis. I don’t not appreciate the effort to walk through the creation of a pedal here…but all the talk of ‘scoop’ and ‘clipping’ and ‘meaty’ and ‘tone control’ and ‘usable/friendly’ and ‘fuzzy’ and ‘fizziness’ and ‘presence’ is utter gibberish. Would love it if he did some direct edits where he was playing ‘before and after’ and ‘compare this capacitor with that capacitor’ rather than just describing the sound. Really working hard to translate that kind of language into actual guitar sounds, but it seems impenetrable sometimes. Thank you for making it easier to match sounds to buzzwords.
I’m an EE and though I know all the details of how to analyze this circuit, I found it super helpful to hear each change. Thank you for the great teaching session.
Being an EE myself I’ve found classical opamp design approaches less than useful, these circuits are basically broken in any other industry, as long as it’s not fatal for a component, just plugging in parts empirically with a goal in mind is the way to go, knowing circuit topology does help some here, calculating poles of the filters not so much... it’s fun for sure, not having to hit a precise goal with ultra low distortion or super low DC offset that’s actually manufacturable, is a nice break...
What are you doing now since you chose ee for a profession but are still interested in Things like These? (and presumably dont build them for a living)
To be fair, you wouldn't be taught things like this video in EE because with amplifier design, distortion is a bug not a feature, and A LOT of consideration is given for how to minimize SNR, not how to adjust SNR to taste lol. The circuit in this video is a basic non-inverted opamp circuit that's probably illustrated near the end of the TL082 datasheet along with the gain equations, plus some diodes in the negative feedback loop, plus some filtering. Plenty of EE courses include filtering and pretty much all electrical applications include filters, and yeah they aren't usually audible but they are usually visible on an oscope or spectrum analyzer.
Brian, as an aspiring pedal builder, your videos are immensely helpful. May I request that you do this format more in the future with other types of circuits? Also, if you do, would it be possible to show shots of your breadboard as you add components to it? Seeing your component placement would be very helpful for someone like me. Thanks for everything you do, both as a builder and an educator in this community, you're really a titan and I just want to say I'm so glad you continued to make these videos and keep this channel going, I know that there was some uncertainty as to whether you would continue for a while and I know I literally just said it, but I, for one, am extremely happy you made the decision you have. edit: i ask this with the purpose of hoping to follow along with your videos and build the circuits myself so I can really hear the stuff you're talking about in the room and develop a better understand of breadboard signalflow decisionmaking etc. Thanks!
This was EXACTLY the type of content I think a lot of us rookies were looking for. Phenomenal video. Would love to see something like this done for a DIY Delay or Reverb.
Hi Brian. I built one of these overdrives tonight, from the schematic you displayed. I love it - really versatile for such a low parts count. Thanks for sharing your expertise.
Nice one, Brian. One of the things many people either overlook or don't quite grasp is that the more metal you wiggle over a pickup, the greater the signal produced. So it should not surprise us that wiggling a wound E or A string over a pickup yields a noticeably greater signal than wiggling an unwound B or E. I like to say that most of the guitar signal "lives in the basement", meaning that the lower the note, the hotter (higher amplitude) the signal produced. Now, *nothing* gets clipped until it approaches what is called the "forward voltage" of the diodes - the signal level where they begin to conduct. We use some amplification of the signal to reach that point. But because it's higher amplitude to begin with, the lower notes on the bass strings don't really require as *much* amplification to reach that point or threshold. The genius of the Tube Screamer is that it used a strategy Brian illustrates here. The 1k/220nf pair (R46/C28) provide a modest (6db/octave) bass rolloff, near identical to the Tube Screamer, starting around 723hz. Progressively reducing the amount of bass signal hitting the diodes (by amplifying the bass *less* than everything above it) makes it such that pretty much all notes stand an equal likelihood of clipping. I don't know if one would call this a "smoother" sound, but it is more even-handed and predictable. You will note that when Brian uses the larger-value (1uf) cap instead of 220nf, not only is there more audible bass, but the sound is also more distorted. Some commercial pedals will employ various means to reduce or introduce that bass level to yield more even or bass-heavy overdrive. It's a handy feature for adapting to guitars with greater and lesser bass content, or simply heavier and lighter-gauged strings.
I became an electrician for many reasons. One of them is this channel. I love guitar and I love how it takes the basics of electricity and can change it into something beautiful. Thanks so much for explaining so much.
Brian, it is really impressive how you educate us on the science behind the electronics. Most youtubers don't get out the breadboard, love it. I'm still learning what any of these things mean
Aside from how much I learned about pedal design, why hasn't anyone commented on the killer guitar playing happening in this video? Thanks for sharing your knowledge and playing!
Brian - thanks so much for doing these. It's helps everyone demystify gear. I do photography and I learned that I could waste a lot of money up front on it. For years playing the guitar I operated under the assumption that good tone costs money. With yours and others help I've learned that good tone takes research and understanding the technology just as it does with photography. Also, the Terraform is awesome. I've had it for a few months now and it's one of the best pedals I've ever owned. Thanks!
Thank God there are nerdy people like you who explain things with knowledge and experience in the best way and nerdy people like me who want to learn! Thank you a lot for the info I found on the webpage and this video!
I just started building circuts in my own and this video was very cool to build along with. Thank you for sharing it. Talking about the components on the feedbackloop of the op-amp helped me understanding it better.
My topics are fairly niched, therefore it’s a smaller channel by intention. I’d rather go a little deeper in a topic but reach less people then make a fairly generic video that doesn’t really teach anything or help anyone. I’m glad you like the channel 😊
I'm an absolute beginner when it comes to DIY electronics and pedals and I found this video extremely useful to understand how circuit design affects the sound. Thank you very much!
I've been trying to build circuits for years. It's still magic to me. I still haven't found any teaching material that can explain what each component actually does to other components and why without going into advanced circuitry diagrams or loads of math.
With capacitors you really need to know a couple formulas. Anything in electronics kinda requires a bit of the maths. So just look it up, it's necessary for good understanding
Another Brilliant video, Brian. Your videos have made me understand a lot more about how pedals are conceived, built and how and why they sound the way they do. From pedal stacking to in depth looking into tone and pedal building, the best and most informative video site by far. fun too. Thanks.
After watching many, many, many of your videos I have modded almost every pedal I own, its cost peanuts and I have made some radical advances in tone. I salute you sir, keep up the good work 👍
this is super awesome, thanks for this level of insight!!! and i can't help but think that a generic kind of overdrive like this, with a few rotary switches for different value components and a few extra attenuation pots could be a REALLY fun pedal!!!
I watched this video the first time, didn't understand it. Watched it 3 more times, still didn't sink in. Watched videos on any electrical component I could imagine and now it's starting to click but what I'm realizing is I need to really understand how to read a schematic before anything will truly make sense.
Thank you Brian for making this excellent video! Especially with the circuit diagram being shown in between each alteration to the circuiy. I learned more about what specific circuit elements do to the sound from watching this video, than i have done from hours of reading pages and listening to sound clips in the past.
Thank you. I''d been wondering where EQ/tone control would go for a drive, and you showed me that there re two places and explained the different results you'd get.
This is exactly what I'm looking for, something that explains the audio effect of different components rather than what the interaction between all of them at the level of electricity
If you like this video you will LOVE the new line course coming out next month! www.guitarpedalcourse.com/courses/how-to-design-overdrive-circuits-for-guitar-pedals-for-beginners
Such a great video. Your videos lately Brian have been amazing. I started building pedals a year ago and your videos have been inspiring and motivating me to do more. Thanks!
Cool video Brian. I learned how to build pedals from the first iteration of your book and I'm forever grateful to you for it. Thanks for all the info you share
Exceptional explanation, would very much appreciate seeing the breadboard placement as it is challenging to visualize the physical relationships of Thor components
I knew what the components are (remember from school) but I had no idea what they do to the sound. Thanks to the person who's suggested this and thank you for making this video! This was great!!!
Excellent demo. seeing and hearing the circuit broken down step by step really helped me under stand its structure better I learned a lot from this video. Thanks!
Video suggestion: A beginners guide to pedal circuits. What's the function of resistors, capacitors, transistors etc.. Is capacitors always/only related to bass/tone? What's the significance of where in the circuit you place the different components; of what directions they have (plus/minus/ground); of the size of the components. Stuff like that.
Well, I'm graduating in eletronic engineering and I'd say you'd need some years of study to understand what's going on, and without being a master of the field. You'd need a lot of math and circuit courses to get to the final tool you can use and understand them.
@@kiromaisus as these apply to guitar amp and pedal circuits, no, I wouldn't say it takes years. Well, it doesn't have to, but it might, depending on how much time one can devote to reading and researching. You certainly don't need an EE degree to understand it. But, you might get interested in EE as one learns how their amps and pedals work.
Resistors resist current and they can be used to "drop" voltage. It occurs as the natural operation of the component so it can be used to set voltage levels. Capacitors store electric charge. They are literally a break in a conductor (which is how it's schematic symbol looks). Capacitors are an open circuit to DC (zero frequency) so they can be used to block DC and keep it from places you don't want it, such as separating the power supply (DC) from the audio signal which is AC. The capacitance rating (in conjunction with a resistor, forming an "RC circuit" aka a "tuned" circuit) will determine the frequencies allowed to pass. Ex. In a fender strat tone circuit (the capacitor and the resistance of the potentiometer), they used .1 microfarad (μF) capacitors very early on. Now, .047 microfarad is common. With the tone all the way "down" ( where the capacitor is fully engaged in the circuit), the .1μF will sound "darker" than the .047 μF because the .1 is "larger," so it allows more lower frequencies. The .047μF is comparatively "smaller" and thus more restrictive. Thus, a .05μF would be a little darker than the .047, but brighter than the .1μF. Considering the math that the other poster mentioned, there are formulas in which you could calculate the actual frequencies where the cutoffs occur. That is how you tune the circuit through, either coupling capacitors, low or high pass filters, or tone capacitor (when used in a dedicated tone stack). They all tune to varying degrees, but most aren't adjustable by the user..... Unless you want to modify the circuit and swap components of different values. The tone stack gives the user the main adjustability.
@@TheDesertRat31 Thank you! that's exactly the kind of thing I was looking for. What's the reason for wanting to set voltage levels? Capacitors are only an open circuit to DC once it's charged right? or is it also open while it's charging? maybe the charging occurs so fast that it's not considered?
Excellent video Brian - sonic alchemy with electronics is a beautiful thing - and it's amazing how useful and good sounding the simple circuit turns out. The Bode plots are a fantastic companion to show us qualitatively what is actually happening. Tone controls and loading is where it is all at....awesome and thank you!!
Greatly appreciated. I'm about to mod my 1st pedal. It's a TS type with 3 diff diode possibilities. I socketed the diode section to jump to the breadboard. I was fine with all of that. Got a good selection of diodes, caps & resistors. My head scratch was altering the caps. Thx much.
Thanx again big time. I was surprised at how good it sounded. It would make a great pedal for working at home at low volumes to take that tinny scratchy sound out of my amp when practising. I watch these vids several times until I can take it all in. Looking forward to the next show.
Thanks, this sort of content is really appreciated. I've been spending my lockdown breadboarding and this has helped me organise my design process, tuning and refining my choice of BJT and diodes.
You are a genius friend! Thank you very much for this video, this type of information is very useful for us sound enthusiasts. I send you a big greeting from Argentina.
Thank you for this video I been looking for someone to actually explain circuits and what the components are actually doing. This vid hit the spot! Def gunna geek out and binge watch ur catalog soon! Thank you!!
Brief glimpses of breadboard @ 10:10 to 10:18. I’ll never understand why he showed himself instead of breadboard (no 2nd cam?), but appreciate what we got. The schematic shots were most helpful, as was the step-by-step description. Thanks 🤙
This is exactly what I want to see at this moment! Brian Wampler building a circuit and explaining what components are doing as he adds them. I've just bought a breadboard and some components to build a 1W amp as a first project, with a fuzz being the second. Please do more like this.
Thank you a lot! This seems like a great starter builder circuit, I will probably build a padal using this for a school project next year, but i will have to play around with the capacitors as I wanted to make a bass OD and figure out how to add a footswitch, but this really helps a lot!
I was so excited to watch this and learn what each component does. I’m good enough with electronics that I could build this and troubleshoot it from the schematic, but I still don’t actually know what each of these components actually does after watching this. I mean, I know what a resistor does, but when you put a resistor between the op-amp negative and the capacitor before the ground, I don’t know what that resistor or capacitor are actually doing. It would be great if you had just verbally explained the power section and the function of each component, rather than just showing how the sound changes as they are added. This video seems like it’s for beginners but it assumes the viewer knows what an op-amp is and how and why the power section is constructed as it is. Great video though, still. I can use this knowledge to build this exact OD, but not necessarily my own. I wouldn’t know what to change because I don’t fully know what the function of each component is. I know what a resistor does but not why each is in place, nor why you’ve used those values. Thanks for the video, I’m excited to check out more of your channel.
Then you're clearly not good enough with electronics, contradicting the first half of your second sentence. If this video was to explain how op-amps work, go into all of the different configurations of resistors and caps with the inverting and non-inverting inputs, then it would be hours and hours long. That's not to mention covering how filters work and how they affect tone. This video isn't necessarily about how each individual component affects the sound, it's about how each section of the circuit (the amp, filters, voltage dividers, etc, that contain said individual components) affects it. If you don't know how these sections work on their own in an isolated circuit, then you have a lot more to learn before getting into this video.
Yo, I’m feeling exactly the same as your description. I don’t know how each parts really do to the sound. Knowing you posted this comment 3y ago, what did you do to get that knowledge ? Thanks
I myself don’t use pedals, but I’ve been delving into more solid state amp mods and repairs, having always been a tube junkie. I’m really enjoying your videos because of the practicality of presentation! Thanks for sharing your knowledge.
Having only built a couple of clone pedals from pre-designed and printed boards, this has been massively helpful in understanding the effect of different components on the overall output and tone of the guitar. I have a massive amount of components now, just need to get a few more - op amps, pots and some breadboard - before I feel I can start experimenting for myself! Thank you!
Great video! I already have too many hobbies, but this really makes me want to shift my electronics hobby away from microcontrollers and robotics to guitar pedals!
Very nice demonstration. This is how I like to work... make small changes and evaluate their effects, either with sound, or a scope (for non-audio projects). Thank you.
Interesting video. I'd love to see it again with a pure sine wave for an input and an oscilloscope showing the change in wave form through the additional component additions.
@Jacob Faseler I have EveryCircuit on my phone and Tina installed on my tablet. While these software simulators are nice they do have their limitations unless you buy the full blown versions. I've designed circuits in software that did not work when breadboarded. Sometimes it just took changing a few resistor values on the breadboarded version to fix my problems. Once I'm building on a breadboard I use a real scope and real volt meters and amp meters. With an audio device I also like my ears to hear the differences. Apps on our phones can replace my old signal generators though.
Very informative with the sound as function of parameters. Hear the effect of diodes clipping. My idea was that the sound would be without clipping. Many thanks. must build one pedal.
I love your videos and think you make some of the best pedals your pantheon is just amazing it really is the best BB circuit I wish you could get a overdrive boost out so you just stomp it rather then have to flick a switch. But man your pedals are some of the best. I love you and diamond pedals.
Thank you so much for this!! I won't even try to express how important something like this is at my stage of understanding circuits. Not to be sappy but it almost feels like you read my my mind and figured out what I need to know next in order to get better. This is really great \m/
Thought I'd write you a comment here so you see it about a previous vid......but super like this one too...Story goes........Just happened to have seen a Boss ODsd1 at my local store reduced; had been sitting around in the back room and forgotten about as it was a dud. But the guy who got it out didn't know this. Anyway, it was only £35 so.....got it home to find out it was screaming....looking up stuff came across an old gentleman who fixes amps very kindly shows you what he does and teaches schematics on line. I've had it for months now......so then thought I'd take a look to see if there was a schematic I could read and up you came........So yes.......very interested in these types of videos....have been watching you anyways.......So thank you....... I own three pedal that's all. Interested in building an amp some time. Much appreciated. Thank you so much Limechillo from England.
Now split the signal, on one signal do deep/high very fuzzy hard clipping with no mids, AND on the other signal do the same soft clipping you just did but scoop *some* of the mids out and give it a little fuzz here, and on this sides output give it another more simple soft clipping amp (leave the raspiness alone) You have now achieved the crunchiest tone ever. Congrats.
I've just made this overdrive circuit and I think it sounds great! Maybe not quite as creamy or tube-like as something a bit more sophisticated, but I've already got a box that does that. This is a little bit rougher and edgier, but that's exactly what I wanted. 40 years ago I used to have one that I made that was very similar to this, but somehow it disappeared along the way and I lost the circuit diagram; this is as close as I've been able to find. I wanted the sound of the circuit as it is with the diodes in the feedback loop, but I also wanted the sound you get when they're across the output, so I used a DPDT switch to give me the option. The switch has a centre-off position which disconnects both sets of diodes so then it's only the opamp itself distorting, but this option is much, much louder, so if you try it, beware! Thank you Brian, I really, really appreciate the article and the video.
Thankyou ! I have just built my first guitar pedal based on your circuits in this video . I have however given myself 3 tone options (basic hf rolloff / 3 band active eq / no tone) .. I have also made the soft clipping and hard clipping variants optional . I am loving the sound and have now housed the project in a Hammond 1950X case. Happy man :-)
Great video, really nice explanation of each part. I’ve only ever built valve amps, the solidstate world is a bit new to me and this helped a lot! Thanks for making it
VERY NICE BUT SEEING SHOTS OF BREADBORED AS U BUILD WOULD BE EVEN BETTER
why? The schematic tells you everything.
That is what the schematic is for.
@@wampler_pedals maybe for esthetics? ... but seriously seeing only breadboard could be very misleading ...
WHY ARE WE YELLING
Rudely put by fred, but I think seeing the breadboard evolve/build as Brian walks through the stages would be really great to see to help those who don't know how to read a schematic very well. I'm still wrapping my head around schematics and trying to learn electronics, so visual learning is a huge part of my ability to learn something new and hopefully make the leap from "complete noob" to "noob". Seeing the breadboard as it relates to the schematic would be super helpful for my personal learning style, especially with a master builder like Brian walking us through it. Great vid! I hope we see more :)
In a world of self-interest fed by narcissistic social media, here is an expert in his field using the platform to freely share his wisdom and raise us up instead of keep us down.
Gives me some faith we might not be extinct in the next ten years. Thank you, Brian!
Not exaggerating when I say I have been CRAVING content like this lmao, so happy to see such an educated breakdown presented in an easily understood format, but with the added plus of being edited and filmed well.
Well Said
Here's an index to compare sounds in different sections of the video:
0:41 - Input to output
(bypass)
1:02 - Input filter
only
3:00 - OpAmp 1/3 (gain @ 0%)
3:20 - OpAmp 2/3 (gain @ 50%)
3:45 - OpAmp 3/3 (gain @ 100%)
4:18 - Low pass filter capacitor
5:20 - Clipping diodes
7:46 - Tone improvement via bottom capacitor 1/2 (stock, .22uF)
8:00 - Tone improvement via bottom capacitor 2/2 (1uF)
9:15 - Tone control 1/3 (all treble)
9:40 - Tone control 2/3 (all bass)
10:09 - Tone control 3/3 (sweet spot)
11:02 - Tone control bottom capacitor .047uF 1/4 (somewhere in the middle)
11:19 - Tone control bottom capacitor .047uF 2/4 (all bass)
11:32 - Tone control bottom capacitor .047uF 3/4 (all treble)
12:15 - Tone control bottom capacitor .047uF 4/4 (sweet spot)
13:09 - Tone control bottom capacitor 1uF 1/2 (somewhere in the middle)
13:23 - Tone control bottom capacitor 1uF 2/2 (sweet spot)
He didn’t talk much except for useful stuff.
Really helpful thank you!
Yes - thank you very much Luis.
I don’t not appreciate the effort to walk through the creation of a pedal here…but all the talk of ‘scoop’ and ‘clipping’ and ‘meaty’ and ‘tone control’ and ‘usable/friendly’ and ‘fuzzy’ and ‘fizziness’ and ‘presence’ is utter gibberish. Would love it if he did some direct edits where he was playing ‘before and after’ and ‘compare this capacitor with that capacitor’ rather than just describing the sound.
Really working hard to translate that kind of language into actual guitar sounds, but it seems impenetrable sometimes. Thank you for making it easier to match sounds to buzzwords.
I’m an EE and though I know all the details of how to analyze this circuit, I found it super helpful to hear each change. Thank you for the great teaching session.
Being an EE myself I’ve found classical opamp design approaches less than useful, these circuits are basically broken in any other industry, as long as it’s not fatal for a component, just plugging in parts empirically with a goal in mind is the way to go, knowing circuit topology does help some here, calculating poles of the filters not so much... it’s fun for sure, not having to hit a precise goal with ultra low distortion or super low DC offset that’s actually manufacturable, is a nice break...
went to school got my EE, wanted to design these kinds of things. learned more here than in 4 years lol.
not that the degree hasnt paid off... 😀
What are you doing now since you chose ee for a profession but are still interested in Things like These? (and presumably dont build them for a living)
To be fair, you wouldn't be taught things like this video in EE because with amplifier design, distortion is a bug not a feature, and A LOT of consideration is given for how to minimize SNR, not how to adjust SNR to taste lol. The circuit in this video is a basic non-inverted opamp circuit that's probably illustrated near the end of the TL082 datasheet along with the gain equations, plus some diodes in the negative feedback loop, plus some filtering. Plenty of EE courses include filtering and pretty much all electrical applications include filters, and yeah they aren't usually audible but they are usually visible on an oscope or spectrum analyzer.
Brian, as an aspiring pedal builder, your videos are immensely helpful. May I request that you do this format more in the future with other types of circuits? Also, if you do, would it be possible to show shots of your breadboard as you add components to it? Seeing your component placement would be very helpful for someone like me. Thanks for everything you do, both as a builder and an educator in this community, you're really a titan and I just want to say I'm so glad you continued to make these videos and keep this channel going, I know that there was some uncertainty as to whether you would continue for a while and I know I literally just said it, but I, for one, am extremely happy you made the decision you have.
edit: i ask this with the purpose of hoping to follow along with your videos and build the circuits myself so I can really hear the stuff you're talking about in the room and develop a better understand of breadboard signalflow decisionmaking etc. Thanks!
Let’s see some LFO circuits! Get into trem/vibrato!
This was EXACTLY the type of content I think a lot of us rookies were looking for. Phenomenal video. Would love to see something like this done for a DIY Delay or Reverb.
Hi Brian. I built one of these overdrives tonight, from the schematic you displayed. I love it - really versatile for such a low parts count. Thanks for sharing your expertise.
is the upside down triangle a symbol for ground?
@@thomasdavis5230 yes
I am working on this overdrive rn but I am stuck on the op amp part what are the additional connections that are not shown on the Schematic?
@@drake.hansen pin 4 to gnd pin 8 to +9v
Nice one, Brian.
One of the things many people either overlook or don't quite grasp is that the more metal you wiggle over a pickup, the greater the signal produced. So it should not surprise us that wiggling a wound E or A string over a pickup yields a noticeably greater signal than wiggling an unwound B or E. I like to say that most of the guitar signal "lives in the basement", meaning that the lower the note, the hotter (higher amplitude) the signal produced.
Now, *nothing* gets clipped until it approaches what is called the "forward voltage" of the diodes - the signal level where they begin to conduct. We use some amplification of the signal to reach that point. But because it's higher amplitude to begin with, the lower notes on the bass strings don't really require as *much* amplification to reach that point or threshold. The genius of the Tube Screamer is that it used a strategy Brian illustrates here. The 1k/220nf pair (R46/C28) provide a modest (6db/octave) bass rolloff, near identical to the Tube Screamer, starting around 723hz. Progressively reducing the amount of bass signal hitting the diodes (by amplifying the bass *less* than everything above it) makes it such that pretty much all notes stand an equal likelihood of clipping. I don't know if one would call this a "smoother" sound, but it is more even-handed and predictable.
You will note that when Brian uses the larger-value (1uf) cap instead of 220nf, not only is there more audible bass, but the sound is also more distorted. Some commercial pedals will employ various means to reduce or introduce that bass level to yield more even or bass-heavy overdrive. It's a handy feature for adapting to guitars with greater and lesser bass content, or simply heavier and lighter-gauged strings.
Mark Hammer great synopsis!
@@GearGasms Thanks. Only took me 40 years to figure out! :-)
@@markhammer643 Ha Ha. 45 years for me!
Props to you and to whoever posed the question. Smart stuff.
I became an electrician for many reasons. One of them is this channel. I love guitar and I love how it takes the basics of electricity and can change it into something beautiful. Thanks so much for explaining so much.
Brian, it is really impressive how you educate us on the science behind the electronics. Most youtubers don't get out the breadboard, love it. I'm still learning what any of these things mean
Aside from how much I learned about pedal design, why hasn't anyone commented on the killer guitar playing happening in this video? Thanks for sharing your knowledge and playing!
WHERE ARE THE TABS FOR THIS!!????
Brian - thanks so much for doing these. It's helps everyone demystify gear. I do photography and I learned that I could waste a lot of money up front on it. For years playing the guitar I operated under the assumption that good tone costs money. With yours and others help I've learned that good tone takes research and understanding the technology just as it does with photography. Also, the Terraform is awesome. I've had it for a few months now and it's one of the best pedals I've ever owned. Thanks!
Thank God there are nerdy people like you who explain things with knowledge and experience in the best way and nerdy people like me who want to learn!
Thank you a lot for the info I found on the webpage and this video!
This is awesome! Every guitar player that owns a soldering iron should see this!
So much yes!!! I have been very curious about how all of this works for a long time. Thank you for making this video and going through the trouble.
I just started building circuts in my own and this video was very cool to build along with.
Thank you for sharing it. Talking about the components on the feedbackloop of the op-amp helped me understanding it better.
How you only have 100K subs is beyond me. Great video and thank you for making me feel more knowledgeable
My topics are fairly niched, therefore it’s a smaller channel by intention. I’d rather go a little deeper in a topic but reach less people then make a fairly generic video that doesn’t really teach anything or help anyone. I’m glad you like the channel 😊
I'm an absolute beginner when it comes to DIY electronics and pedals and I found this video extremely useful to understand how circuit design affects the sound. Thank you very much!
I've been trying to build circuits for years. It's still magic to me. I still haven't found any teaching material that can explain what each component actually does to other components and why without going into advanced circuitry diagrams or loads of math.
With capacitors you really need to know a couple formulas. Anything in electronics kinda requires a bit of the maths. So just look it up, it's necessary for good understanding
Another Brilliant video, Brian. Your videos have made me understand a lot more about how pedals are conceived, built and how and why they sound the way they do. From pedal stacking to in depth looking into tone and pedal building, the best and most informative video site by far. fun too. Thanks.
This is great, thankyou so much, this is the kind of pracs we require in Uni, so much more than simply running some calcs and reviewing bode plots..
This is the best way to understand how different elements work. THANK YOU!
Best video on TH-cam! Thank you so much for providing this information. You are a gift to humanity!
After watching many, many, many of your videos I have modded almost every pedal I own, its cost peanuts and I have made some radical advances in tone. I salute you sir, keep up the good work 👍
this is super awesome, thanks for this level of insight!!! and i can't help but think that a generic kind of overdrive like this, with a few rotary switches for different value components and a few extra attenuation pots could be a REALLY fun pedal!!!
I watched this video the first time, didn't understand it. Watched it 3 more times, still didn't sink in. Watched videos on any electrical component I could imagine and now it's starting to click but what I'm realizing is I need to really understand how to read a schematic before anything will truly make sense.
Thank you Brian for making this excellent video! Especially with the circuit diagram being shown in between each alteration to the circuiy. I learned more about what specific circuit elements do to the sound from watching this video, than i have done from hours of reading pages and listening to sound clips in the past.
Thank you. I''d been wondering where EQ/tone control would go for a drive, and you showed me that there re two places and explained the different results you'd get.
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...instant like!
Thank you Mr. Wampler. Stay safe and healthy.
This is exactly what I'm looking for, something that explains the audio effect of different components rather than what the interaction between all of them at the level of electricity
If you like this video you will LOVE the new line course coming out next month!
www.guitarpedalcourse.com/courses/how-to-design-overdrive-circuits-for-guitar-pedals-for-beginners
Such a great video. Your videos lately Brian have been amazing. I started building pedals a year ago and your videos have been inspiring and motivating me to do more. Thanks!
Cool video Brian. I learned how to build pedals from the first iteration of your book and I'm forever grateful to you for it. Thanks for all the info you share
This was really informative, thank you! I think the step-by-step format is great for understanding the individual part each component is playing.
Exceptional explanation, would very much appreciate seeing the breadboard placement as it is challenging to visualize the physical relationships of Thor components
what happens if I raise the tone's pot ?
I knew what the components are (remember from school) but I had no idea what they do to the sound. Thanks to the person who's suggested this and thank you for making this video! This was great!!!
do you know whats happens if I raise the tone pot ?
As I learn more about electronics, more things in this video start to “click” whenever I come back to watch. Thank you Brian, invaluable info here!
Excellent demo. seeing and hearing the circuit broken down step by step really helped me under stand its structure better I learned a lot from this video. Thanks!
Thank You!!!
I cannot tell you how much this helped!
Video suggestion: A beginners guide to pedal circuits. What's the function of resistors, capacitors, transistors etc.. Is capacitors always/only related to bass/tone? What's the significance of where in the circuit you place the different components; of what directions they have (plus/minus/ground); of the size of the components. Stuff like that.
Well, I'm graduating in eletronic engineering and I'd say you'd need some years of study to understand what's going on, and without being a master of the field. You'd need a lot of math and circuit courses to get to the final tool you can use and understand them.
@@kiromaisus as these apply to guitar amp and pedal circuits, no, I wouldn't say it takes years. Well, it doesn't have to, but it might, depending on how much time one can devote to reading and researching. You certainly don't need an EE degree to understand it. But, you might get interested in EE as one learns how their amps and pedals work.
Resistors resist current and they can be used to "drop" voltage. It occurs as the natural operation of the component so it can be used to set voltage levels. Capacitors store electric charge. They are literally a break in a conductor (which is how it's schematic symbol looks). Capacitors are an open circuit to DC (zero frequency) so they can be used to block DC and keep it from places you don't want it, such as separating the power supply (DC) from the audio signal which is AC. The capacitance rating (in conjunction with a resistor, forming an "RC circuit" aka a "tuned" circuit) will determine the frequencies allowed to pass. Ex. In a fender strat tone circuit (the capacitor and the resistance of the potentiometer), they used .1 microfarad (μF) capacitors very early on. Now, .047 microfarad is common. With the tone all the way "down" ( where the capacitor is fully engaged in the circuit), the .1μF will sound "darker" than the .047 μF because the .1 is "larger," so it allows more lower frequencies. The .047μF is comparatively "smaller" and thus more restrictive. Thus, a .05μF would be a little darker than the .047, but brighter than the .1μF. Considering the math that the other poster mentioned, there are formulas in which you could calculate the actual frequencies where the cutoffs occur. That is how you tune the circuit through, either coupling capacitors, low or high pass filters, or tone capacitor (when used in a dedicated tone stack). They all tune to varying degrees, but most aren't adjustable by the user..... Unless you want to modify the circuit and swap components of different values. The tone stack gives the user the main adjustability.
@@TheDesertRat31 Thank you! that's exactly the kind of thing I was looking for.
What's the reason for wanting to set voltage levels?
Capacitors are only an open circuit to DC once it's charged right? or is it also open while it's charging? maybe the charging occurs so fast that it's not considered?
@@TheDesertRat31 well said. I appreciate you giving a brief explanation as opposed to just saying "nah you'd need years of study like to get it" lol
wow this is the best video ever. thank you so much for sharing this knowledge.
This is one of the most informative pedal videos I’ve watched on here. Brian you’re really on another level when it comes to tweaking drive circuits.
The sound of this effect very exceptional just what I was looking for and all this on a breadboard perfect. 🎉🎉🎉I Great tut and explanation.🎉🎉🎉
Excellent video Brian - sonic alchemy with electronics is a beautiful thing - and it's amazing how useful and good sounding the simple circuit turns out. The Bode plots are a fantastic companion to show us qualitatively what is actually happening. Tone controls and loading is where it is all at....awesome and thank you!!
Greatly appreciated. I'm about to mod my 1st pedal. It's a TS type with 3 diff diode possibilities. I socketed the diode section to jump to the breadboard. I was fine with all of that. Got a good selection of diodes, caps & resistors. My head scratch was altering the caps. Thx much.
I'm amazed how such a fantastic sound could come from a circuit that is relatively simple.
Thanx again big time. I was surprised at how good it sounded. It would make a great pedal for working at home at low volumes to take
that tinny scratchy sound out of my amp when practising. I watch these vids several times until I can take it all in. Looking forward to the next show.
Thanks, this sort of content is really appreciated. I've been spending my lockdown breadboarding and this has helped me organise my design process, tuning and refining my choice of BJT and diodes.
I am just getting started with pedal building. Thank you very much for doing this.
Thanks, man. That was great. Very easy to understand without getting too technical.
You are a genius friend! Thank you very much for this video, this type of information is very useful for us sound enthusiasts. I send you a big greeting from Argentina.
Thank you for this video I been looking for someone to actually explain circuits and what the components are actually doing. This vid hit the spot! Def gunna geek out and binge watch ur catalog soon! Thank you!!
Great video and details on the basics. The changes in the schematics help us out. Thanks for your time.
Brief glimpses of breadboard @ 10:10 to 10:18. I’ll never understand why he showed himself instead of breadboard (no 2nd cam?), but appreciate what we got. The schematic shots were most helpful, as was the step-by-step description. Thanks 🤙
This is exactly what I want to see at this moment!
Brian Wampler building a circuit and explaining what components are doing as he adds them.
I've just bought a breadboard and some components to build a 1W amp as a first project, with a fuzz being the second.
Please do more like this.
Thank you a lot! This seems like a great starter builder circuit, I will probably build a padal using this for a school project next year, but i will have to play around with the capacitors as I wanted to make a bass OD and figure out how to add a footswitch, but this really helps a lot!
I love this. I have always been a hands on electronics nerd so with the cost of many guitar pedals, this content is priceless. Thank you
I was so excited to watch this and learn what each component does. I’m good enough with electronics that I could build this and troubleshoot it from the schematic, but I still don’t actually know what each of these components actually does after watching this. I mean, I know what a resistor does, but when you put a resistor between the op-amp negative and the capacitor before the ground, I don’t know what that resistor or capacitor are actually doing. It would be great if you had just verbally explained the power section and the function of each component, rather than just showing how the sound changes as they are added. This video seems like it’s for beginners but it assumes the viewer knows what an op-amp is and how and why the power section is constructed as it is. Great video though, still. I can use this knowledge to build this exact OD, but not necessarily my own. I wouldn’t know what to change because I don’t fully know what the function of each component is. I know what a resistor does but not why each is in place, nor why you’ve used those values. Thanks for the video, I’m excited to check out more of your channel.
Then you're clearly not good enough with electronics, contradicting the first half of your second sentence. If this video was to explain how op-amps work, go into all of the different configurations of resistors and caps with the inverting and non-inverting inputs, then it would be hours and hours long. That's not to mention covering how filters work and how they affect tone.
This video isn't necessarily about how each individual component affects the sound, it's about how each section of the circuit (the amp, filters, voltage dividers, etc, that contain said individual components) affects it. If you don't know how these sections work on their own in an isolated circuit, then you have a lot more to learn before getting into this video.
Yo, I’m feeling exactly the same as your description. I don’t know how each parts really do to the sound. Knowing you posted this comment 3y ago, what did you do to get that knowledge ? Thanks
Perfect video. Very understandable. Keep doing this with the most common pedals. I will build this one.
This might be the coolest pedal video I have ever seen.
This week I bought my first Wampler pedal, todays I discover this amazing channel ! 😍
Thank you!! ❤️
DAAAYYYUUUMMM!!! This pedal sounds GREAT!!! Awesome playing too!
I love the premise of this video. Thanks for doing it!
Fantastic... thanks so much Brian! Great to see your 'books back in print'! As Oliver might say "Please Sir, can I have some more!?"
I myself don’t use pedals, but I’ve been delving into more solid state amp mods and repairs, having always been a tube junkie. I’m really enjoying your videos because of the practicality of presentation! Thanks for sharing your knowledge.
A definite requirement for designing pedals is being a great guitar player. Brians got this in the bag!
Having only built a couple of clone pedals from pre-designed and printed boards, this has been massively helpful in understanding the effect of different components on the overall output and tone of the guitar. I have a massive amount of components now, just need to get a few more - op amps, pots and some breadboard - before I feel I can start experimenting for myself! Thank you!
Great video! I already have too many hobbies, but this really makes me want to shift my electronics hobby away from microcontrollers and robotics to guitar pedals!
Thanks. Excellent presentation with interesting discussion and demonstration.
One of the most informative pedal videos out there! Thank You!
Very nice demonstration. This is how I like to work... make small changes and evaluate their effects, either with sound, or a scope (for non-audio projects). Thank you.
Well done such a clean sound and good overdrive
Super-great video. This man knows his topic!
Awesome vid. Very cool seeing the effect of each part as you go through the circuit.
Thank you for explaining things in a way that I can understand!
Glad it was helpful!
Interesting video. I'd love to see it again with a pure sine wave for an input and an oscilloscope showing the change in wave form through the additional component additions.
@Jacob Faseler I have EveryCircuit on my phone and Tina installed on my tablet. While these software simulators are nice they do have their limitations unless you buy the full blown versions. I've designed circuits in software that did not work when breadboarded. Sometimes it just took changing a few resistor values on the breadboarded version to fix my problems. Once I'm building on a breadboard I use a real scope and real volt meters and amp meters. With an audio device I also like my ears to hear the differences. Apps on our phones can replace my old signal generators though.
Really cool. Thanks for sharing Brian. This is really not found elsewhere so we who like circuits are quite happy new! :)
Amazing Mr Wampler! Thanks for the distorsion 101 lesson!
That’s honestly a pedal I would buy. Sounded fantastic
Very informative with the sound as function of parameters.
Hear the effect of diodes clipping.
My idea was that the sound would be without clipping. Many thanks.
must build one pedal.
I love your videos and think you make some of the best pedals your pantheon is just amazing it really is the best BB circuit I wish you could get a overdrive boost out so you just stomp it rather then have to flick a switch. But man your pedals are some of the best. I love you and diamond pedals.
Man.... I really wish Radio Shack was still open. I'd be down there in a heartbeat right now
Thank you so much for this!! I won't even try to express how important something like this is at my stage of understanding circuits. Not to be sappy but it almost feels like you read my my mind and figured out what I need to know next in order to get better. This is really great \m/
Mind blown! Thank you for taking the time to present this. Great stuff!
This is really cool and giving me ideas on how to customize the circuit to get the tone I want.
This taught me so much for my pedal building. Id love to see more of this.
I agree with your cat. When will we see you DIY a univibe lol.
Very cool. Great question Chuck!
I liked how it sounds, and built it. Thanks for the guide
I'm not into engineering at all but this is gold. Even for me. 😍
Fun concept. Great video. Starting up pedal building soon.
Thought I'd write you a comment here so you see it about a previous vid......but super like this one too...Story goes........Just happened to have seen a Boss ODsd1 at my local store reduced; had been sitting around in the back room and forgotten about as it was a dud. But the guy who got it out didn't know this. Anyway, it was only £35 so.....got it home to find out it was screaming....looking up stuff came across an old gentleman who fixes amps very kindly shows you what he does and teaches schematics on line. I've had it for months now......so then thought I'd take a look to see if there was a schematic I could read and up you came........So yes.......very interested in these types of videos....have been watching you anyways.......So thank you....... I own three pedal that's all. Interested in building an amp some time. Much appreciated. Thank you so much Limechillo from England.
Now split the signal, on one signal do deep/high very fuzzy hard clipping with no mids, AND on the other signal do the same soft clipping you just did but scoop *some* of the mids out and give it a little fuzz here, and on this sides output give it another more simple soft clipping amp (leave the raspiness alone)
You have now achieved the crunchiest tone ever. Congrats.
I've just made this overdrive circuit and I think it sounds great! Maybe not quite as creamy or tube-like as something a bit more sophisticated, but I've already got a box that does that. This is a little bit rougher and edgier, but that's exactly what I wanted. 40 years ago I used to have one that I made that was very similar to this, but somehow it disappeared along the way and I lost the circuit diagram; this is as close as I've been able to find.
I wanted the sound of the circuit as it is with the diodes in the feedback loop, but I also wanted the sound you get when they're across the output, so I used a DPDT switch to give me the option. The switch has a centre-off position which disconnects both sets of diodes so then it's only the opamp itself distorting, but this option is much, much louder, so if you try it, beware!
Thank you Brian, I really, really appreciate the article and the video.
I guess you just described the plumes
Thankyou ! I have just built my first guitar pedal based on your circuits in this video . I have however given myself 3 tone options (basic hf rolloff / 3 band active eq / no tone) .. I have also made the soft clipping and hard clipping variants optional . I am loving the sound and have now housed the project in a Hammond 1950X case. Happy man :-)
How did you do the Soft clipping and Hard clipping Switch ??? Thanks
Being a fan of the BD2 and never having delved into modifying pedals, I'm going to get your book on this.
Great video, really nice explanation of each part. I’ve only ever built valve amps, the solidstate world is a bit new to me and this helped a lot! Thanks for making it
Loved it. Learned a nice bit from this real world demo.