ฝัง
- เผยแพร่เมื่อ 28 พ.ค. 2021
- In this video, I use a PT2399 module to build a simple delay pedal. These boards can be bought very cheaply and make an ideal base circuit for someone starting out with DIY stompboxes. I needed to make a small fet buffer for the input signal, and also do a couple of basic mods to the board.
The enclosure is a Hammond 1590B, but it was a tight fit, and for beginners I'd recommend using a 125B instead, or even a 1590BB.
To decorate the box I used self-priming white spray paint, a water transfer decal, and a rattle can of satin clear coat.
The artwork was scanned from a paper coffee cup. - แนวปฏิบัติและการใช้ชีวิต
"One Transistor"
"Here's the PT2399..."
I'm joking btw, I know it's not possible to make a delay without some dedicated chip that does the effect.
Unfortunately, half of TH-cam is filled with idiots who name their videos incorrectly in order to attract more views. The author of this video managed to do this twice in one video. Firstly, calling it a DIY pedal, and secondly, saying that it was made from a single transistor
@@ArtchiFAVN If you don't use "incorrect" titles your video won't be seen by anyone.
please don't say it is only one transisor when you rely on a chip full of them, thank you.
Yea what he said.. “using a simple transistor”. Yea. Theres not a simple transistor in that circuit.. theres an ic with transistors and gates built in it.. if i wanted to make a pedal out of prefabbed boards than id take apart existing ones and combine em or something…
Dont " chips" i.c's also have many resistors capacitors & diodes in them too ?
He did it for clicks
Please dont say a chip when you have half a bag of them all over you.
I agree. I thought it was a bit odd but I figured hey, maybe I missed something.
Officially bingeing all your vids. So well done, with endless possibilities for future content. The more detail the better. Thanks, man 🤙
Thanks mate. I'm glad you like my stuff. In my next video I'm designing an opto tremolo pedal. It will be quite nerdy in parts... ;)
This is a work of art. Thanks for sharing.
Very informative, thanks Rob. Glad I found your channel yesterday.
Excellent, helpful and inspiring build!
I've just bought this module and was seaching tips about that, but this video became bigger that any expectation I had. Thanks for sharing this experience!
Thanks mate.
Good project and great video. Have been thinking of building a delay, might do this one now. Nice to see content like this coming from a fellow resident of the Banana Republic of Australia too!
I've built a few with the PT2399 chip also.... it's quite versatile, and sounds pretty good.
Great sounding build …. Thx for that
Thanks for the video! I am very interested in DIY'ing some pedals myself and this gave me some motivation.
Great build!
The PT2399 can really make some cool ,dirty, analogish echos and running its run-away feedback thru a VCF can make the King Tubby Dub sounds.
I have some high-end solder vacuumed tools but honestly, I find the push-button spring ones shown in this post are just as effective ..and better in some situations.
Rob, you really have a great channel… you have a knack for covering some very practical details that don’t get covered typically. I think beginners get a lot from your channel, and you bridge a gap such that intermediates can glean some cool little tips and ideas, and you’re an example of a great methodology for approaching these kinds of projects.
Yes!!!! Videos like this are why TH-cam exists. Thank you!!
I love this. You are an amazing builder and video creator
Thanks for the kind words. I'm glad you like my stuff!
Thank you for making this great video
Beautiful box design!
Just build one and I love it! Bought two modules for safety. It´s dirty easy without the buffer and the next step is make the buffer :D (to noise at longer times)
I can´t wait to see the next mods to this pedal (the mixer and the filtering stuff)
How do i add only 3pdt foot switch and led without the buffer. I mean how the wiring goes? I already add potentiometer and it workes fine. Now i want to add a foot switch and i cant get it to work.
Nice mod Rob! I'm gonna place this together with a small chip amp that powers a speaker on my bench. I run the amp on a 19v laptop power supply, and I'm pretty sure the regulator on this board can go to 35v. I think I just need to replace the 2 decoupling caps that connect to the 7805 input with higher voltage ones? eg a 480uf 25v, and a 100nf 50v mlcc, which I can place at the power inputs of the module (using through holes). Not sure if this is simpler/better than using a 9v1, 1/2w zener diode (the largest I have on hand).
Jeez Rob you're boring - NOT!
Thanks for posting an interesting vid on the PT chip
Thanks for the wonderful video, the PDF...
I have made it without the input buffer, it is dark through the front of the amp but excellent in the Fx loop. I will do the buffer when I have the time.
Yep, in an effects loop or after a buffered bypass type pedal (boss) it will be fine. But yeah 15k is far too low for direct interface with a passive guitar. You'll get a treble roll off, a signal drop, and often your vol control will be very abrupt.
WES components in Sydney will have tips for that iron.
Many, many thanks for this brilliant video Rob! I'm a novice in electronics, but working hard to develop a nice little 9 volt guitar amp based around the LM386. I failed my Physics A-Level (40 years ago!) but videos/teachers like this/you are what I needed back then! My LM386 amp has been refined and is working great - nice clean, loud sound from such a tiny circuit - but I wanted to add reverb if I could. I usually play acoustic/clean/dry sounds on guitar but it would be nice to have a touch of reverb to take the edge off that dry sound. I tried the Belton Brick board/IC which was OK ... but comparatively expensive (£35 vs the £4.95 for the PT2399 module). Then I found the PT2399 board/module and it's great. So here was my challenge: Knowing very little of electronics (beyond what I've learned through researching how to get the best from the LM386) I wanted to get a reverb/delay module inside the same (Cigar Box) amp enclosure running off the same 9 volt battery. I read (elsewhere) that you could run more than one circuit off a 9v DC supply in parallel, so I just whacked my PT2399 module (same as yours) alongside the LM386 amp circuit (in parallel). Results: Rubbish! Loads of oscillation across the frequency spectrum. So I dabbled with a breadboard between my amp and the PT2399 module and added a cap and resistors across the (shared) power supply to the PT module. Result? Much better! Nearly all the oscillation is gone. I have to admit that, from the maths/physics/electronics point of view, I'm only vaguely aware of what I'm doing with these components but, as I haven't managed to burn the house down (yet) I'll assume I'm making some kind of progress... So, with the power/oscillation issue mainly resolved, I followed everything you said with immense concentration. I found the following: 1) Yes, removing the R27 resistor was a piece of cake - but did need that little bit of extra solder to distribute the heat. And... I didn't melt the board - even though it took a few attempts to "sweep" that resistor aside! 2) Wiring the 10K pot to the SGG through-holes worked a charm, too. 3) I didn't seem to need any buffer! Although there is a perceptible (and slight) volume and top end (treble) drop when the reverb module is added, it is slight, and within the acceptable tolerance, to my ear. I would love to restore this treble, so would be interested in any solution you might have in the aforementioned "filtering..." vid but, in the meantime, I'm enjoying having got my PT2399 reverb unit inside the same box as the LM386 amp with a pretty good reverb sound. Thank you!!!! (PS If you want to check out my amps, please google "Crazy Jack Amplifier". The ones on show in that TH-cam vid are now well out of date and the recent ones sound much better... but with the reverb? Mmmmm Tasty!) Thanks again! :-)
The perfect (fearful) symmetry of the cat picture and it's just slightly wide proportions make it look like it's mirrored , (cos it was drawn mirrored) which makes it a great picture for a copy cat 🐈🐱🐈
I also like the blue ink on white background ceramic look. Sound good too 👍
nice! i'm gonna build some delay pedals into a few spare gameboy shells i have laying around.
Nice job sir!
Thanks Greg!
Awesome video!
Thanks mate.
Suena maravilloso 😍
awesome, can't wait to order the module to build one
May I ask a suggestion? Do you have some mod to use some cheap module as overdrive or preamp for guitar?
Excellent.
@RobMods I was wondering what software you used to create and print the circuit diagrams? I could do with getting into being tidy and organised like that, got to make putting stuff together with fewer mistakes easier.
It really makes building tape delays seem more hellish
It sounds better than my Behringer delay pedal. ...if you can believe that or not. You also have nice hands, a nice guitar, and a nice tone. I wished you played more guitar to demo the pedal more. ...
Thanks mate. I've played guitar since I was a teenager, but I'm really a bass player TBH. I still love this pedal, especially the artwork.
Just curious. Can you make a multiple effects pedal in the Hammond box. Basic five effects of OD 2 Dist 2 Variable Modulation 2 Delay/Verb 2 Amp modeler with noise reduction?
Wow, this one turned out just beautiful. I bet you get hundreds of requests or pre-printed boxes, lol
Wow just found this. It was pleasure to watch so pragmatic explanation of all design decisions during develoment into a final solution together with the artwork. I wonder since you said it is for line level signals (0dB=0.775V) how you got the guitar signal to that level ? Do you have a preamp on the path ? Is it worth putting a buffer on the output as well ?
I was referring more to how line level is usually low impedance. So the guitar signal needs buffering. IIRC, the buffer/preamp for this project had little or no gain. I didn't bother with output buffering. Pedals will almost always feed input thats have high z. The classic Boss pedals always had buffered outputs, but there are plenty of other classic designs that don't bother. With this project I really wanted to keep it as simple as possible, and the module already has a moderately low output z. If there was a volume pot on its output, then I'd have to reconsider. Especially if it was a pedal particularly aimed at bass, since it would be more likely to end up feeding, say a passive DI transformer or a direct line input on a desk or recording interface. Cheers!
can this be made into a gated reverb pedal?
Boa tarde, parabéns pelos projetos, para desenhar o esquema elétrico você usou o ExpressPCB, e para desenhar a pcb qual programa você usou. Sou do Brasil abraços.
Great Video Rob! Any replacement for 2n5484? I can't get it here. Awesome content!!!!
I love these PT2399 Delay projects but sadly i always miss the Feedback feature since there's really only Delay Time and Delay Mix not really a way to enhance the intensity. I wonder... do you have to solder an extra audio line and feeding it back into the Input of the PT2399? I have put together a kit with Stereo input and output (output signal is still only mono though) and tried to feedback one of the channels back into the effect unit since the Unit has 2 volume potentiometers for each channel. So i wonder how easily that would be done with the much simpler kit here?
On these modules it's actually kind of easy to add a feedback knob.
Where can I find instructions for the final build?
Hi Rob, first I want to say thanks for creating this really quality video and coming up with such an interesting project idea, I love stuff like this and really enjoyed your work!
So may I ask what software you used for creating the schematic, and also for doing the stripboard layout? Thanks again!
Pt2399 delay/reverb schematic/diagram. Electromechanical is way more annoying if you're interested in that
Sir how can i add a mix control for this modulation delay
Hello, and thanks for this video. May I inquire what model oscilloscope you use? Cheers
Hi mate. It's a usb interface made by syscomp, called "circuit gear". I'm not sure they still make them. I bought it 8-9 years ago I think. It is great because it has a bode plot function.
Wow, great Video! Congrats! I just managed it, to build this pedal but it is very noisy also at moderate delay times. Is there a way to reduce the noise in the delay loop?
Unfortunately that chip will get pretty gnarly with moderate delay times. The commercial effects with it were mostly slapback type pedals i think. There are a few builders who have chained 2 or 3 in series, and/or used heavy filtering. I still have a few of those modules around and have been toying with that idea. There's also one or two other chips in that series that I believe have longer clean delay times. There's lots of info on the forums about the pt delay chips. Electro smash also have some great info. Cheers!
Would it be possible to make it a chorus by adding the LFO from " little angel" mini chorus to the positive terminal of 47 U cap of pin2 of pt2399. The pin 6 will be connected to ground with anti latching.
I have heard of guys making choruses with the pt2399. From memory there's a few things you have to do to get good short delays with it. There are other chips in the same series that are more suited. The dano chorus that I rehoused in this vid has a pt chip if memory serves. th-cam.com/video/SK94DVrjb9U/w-d-xo.html there's a nice page about the pt chips on electro smash I think. Also worth checking out... www.electrosmash.com/pt2399-analysis
i love to watch this :)
Amigo podría hacer un delay fácil usando el MN3205?
And put a tap tempo button? How i do this?
ROB, try to look into what delay chip is used for the Ibanez delay champ CD10 because is suppose to be a really good slapback delay. The delay chip used in Way Huge Aqua Puss is also suppose to have a good slapback delay. The Ibanez EMS echomachine uses a M65831 echochip that studio producers like not sure why but maybe you can make a video lesson about different echo delay chips used a various 70's 80s 90s guitar pedals and rack mount gear.
Hi Wayne. I just found the schematic for the CP10. It is an analogue delay and uses a pair of chips from the mn3### series. These were very common in choruses, flangers, and analogue delays back in the 80's. They also used an NE571 companding chip for noise reduction and headroom. These chips were obsolete for decades until 5-10 years ago when Behringer's chip manufacturer started remaking them. That's why there's now so many new analogue delays and choruses etc on the market.
@@RobMods The MN3 series the CP10 is specialized for slapback delay not sure why the circuit design is fine tuned for better slapback delay even when its using the same MN3 series delay line chips in other delay echo pedals. The Way Huge Aqua Puss is another pedal designed tuned for slapback delay but it might also use a common delay line IC chip
@@RobMods0
"Keep an eye out on my website for a schematic"
Would be cool if you put a link in the description mate for us who are "new round here"...
Agreed! (Although I did find it, eventually...)
Actually, I think "Copy Cat" works very well, since the delay is a delayed "copy" of the original signal. Better than Coffee Cat, imo. I agree with the other comments that the pedal is a work of art. Super cool.
My first echo unit in 1962 was a Watkins Copycat. The company founded by Charlie Watkins in England changed its name to WEM. I bought a new WEM Copycat in the i990s so Copycat is a registered trade mark.
Are there any mods for module to have less dirty longer times?
Unfortunately for the PT2399, that's the limit. I have heard of pedal designers chaining two together though...
Hey, rob my delay pedal (using same IC) have too much output, it boost my signal volume when its on! What should i do to fix it to unity gain?
Hmm... without seeing the circuit it's hard to say, but often this sort of problem can be fixed with a simple trim pot wired as an attenuator on the output, before the bypass switch.
@@RobMods bulls eye, i put trimpot on op amp output and it fix my problem,
Thanks for your time Rob, i apreciate it!
@@premiumboard21 Nice one mate. Glad you got it sussed!
What is the blue thing surrounding all the wires called?
It's called heat shrink
How many thousands of these kinds of builds must one do before this seems like "a simple build"?
When I saw the title I thought simple would be 2 jacks, 2 pots, a transistor, some wire, a resistor or two and an enclosure.
We have very different ideas about the word "simple"! 😉
Holy cow
One transistor and one sound processor?
When I was getting in to DIY guitar pedals back in the late 90's, the early forums etc were always posting "two-transistor fuzz" projects. There are many many circuits like that in the DIY pedal world, mostly based on the fuzz face. And they are still very popular as projects for beginners. Then the "Bazz Fuss" appeared. A one-transistor fuzz! That's where the thumbnail comes from. It's kind of an in-joke I guess. As I mentioned in the video, it's really a cheeky joke. The PT2399 has thousands of transistors in it.
@@RobMods here is one transistor guitar effect))) th-cam.com/video/Rv5iQ_aenX8/w-d-xo.html
💚
👍👍
it's not really a "one transistor delay" if you have to use a whole entire specially designed ic for delay and echo effects as well.
The good: This is a very simple circuit, and it's great to learn. Does it work? yes. Thank you for the tutorial!
The bad: As a pedal itself, it's terrible. I built it and once placed in my pedal chain, the tone went to hell. It works well by itself, but it's terrible when combined. I tried boosting it out with buffers, but the result was terrible.
If you need a decent delay pedal, there are better circuits, a little more complex than this one. Having said that, as a standalone pedal (meaning, you won't use anything else) it works fine.
But as a learning experience, it's a great tutorial. Kudos for that!
Thanks for the comment. There was a misprint in the original schematic. The input resistor should be 1k, not 10k. You shouldn't hear a treble roll off unless the previous pedal in the chain has an output impedance of more than approx 20k. Apologises.
@@RobMods Thanks for your reply!! I still have the circuit. i will try it, and write of edit my review. Again, it's a great video nevertheless. Best to you!
Sneaky! I was already saying: "it's impossible to have a delay with a single transistor! You need to store a short 100-500ms sample you have taken. A transistor doesn't do that." But it's only the input buffer, the rest is a breakout board.
Yes that's why I clicked,I was like "how is he gonna working that" might learn something..then I saw the PT2399 and felt conned 😂
Man can you please comment and talk to me about what you know? I’m pretty good with learning and I can’t really find anything about what you’re showing us. I would love to understand what you’re doing on the computer and graphs.
The PT2399 contains thousands of transistors. Not just one.
Weare to buy
Haha in what bunker are you sitting?
Just as a correction that chip was invented in 1969 not the 90s it's first pedal use was the original memory man good video though
PT2399 is most certainly a 90s issue cmos, there was no such thing in 1969, you may be thinking about the bucket brigade mn300x series
Where is that "one" transistor? There 's a module used for the real job.Dissapointed :(
In my experience, hot glue doesn’t work for the leds
That's not a transistor, that's IC inegrated circuit
as a biginner i can say your videos are for those, who already knows how to do what you do, because you don't explain much.
Thanks for the feedback. It's always hard to know what to leave in and what to trim when editing. I tend to waffle on with too much detail and if I left it all in, then the videos would be far too long. Hopefully the info sheet on my website will answer some of your questions. robkiddhomepage.wixsite.com/robkiddmusic/rob-mods-yt-extras
K that is cheating.... I prefer to build the entire circuit, you can control the tone, add buffers, and modulation....
Why don't you make the video to show us how it's made
Good for you! No one gives af what you prefer
Nice, but this is way beyond me.
"How To Make A DIY Guitar Delay Pedal":
1)buy a complete delay effect circuit
2)solder a transistor
3)put it in a plastic box
4)paste a nice design
hahahaha this video made me laugh
at first it's not a delay pedal. then you do some things yourself, or DIY. and then it is a delay pedal. yeah?
@@beyshore_ yeah it’s not like the title was “how to build a delay pedal from scratch”
What's the point of this video.... 23min. Wasting of our life
Just curious. Can you make a multiple effects pedal in the Hammond box. Basic five effects of OD 2 Dist 2 Variable Modulation 2 Delay/Verb 2 Amp modeler with noise reduction?