I didn't know LDO's are so touchy. Infact, recently I was wondering why high precision LDO's like the MCP1702 are not used in almost everything ;) I would greatly appreciate this as a separate series too. Specifically a series oriented towards Open Source project designs sent in by hobbyists and students. Maybe even set that up as a requirement. Like submissions for a new detailed series must include full documentation (Schematic/BOM/OS Code/Design File/Gerber Zip) posted online. I would also appreciate a few KiCAD oriented tips and tricks (to keep it really OSHW), first time etching design tips versus/transitioning to our first PCB manufacturer versus different PCB manufacturers. This is probably the perfect timing for a series like this. I imagine there are a lot more people interested in designing our own PCBs now that word of the JLCpcb deal has gotten around. As a hobbyist, I would appreciate a broad multi-part tutorial on the in's and out's of PCB design and development from a professional engineer's perspective. I have been goofing around with my first design to send out, but am reluctant to pull the trigger. -Jake
Well, I rather would love to make a really bad example of 'not doing it' with lots of example faults, and send it in, if wanted, but only if EEVBlog would do a regular series of PCB reviewing. Would that be an idea ? @EEVBlog, just leave me a message if you want, MWagner@computers-home.de
I really enjoyed the analysis of the first-timer PCB sent in. I kept decoupling close to the pins, but never knew why, and never really gave any thought to loop area, so learned something important today.
giving valuable and critical fair review on a first board project, thats how you learn, and my hat off to ya dave. and to the maker of the board, keep at it.
Note to all shippers, fold note into small square and package with/affixed with the parts you can feel outside the package. Dave hasn't learned to not cut the note, even after all the Mailbags.
Dave, I love these videos. Thank You so much for making them! Even though I’m not an electronics genius, you explain everything so clearly that I get most of the stuff and it motivates me to learn more.
One reason is to prevent "twist". When you tighten the screw terminals, one could twist one into the other and "short out". This will become more likely as you insert and remove the banana jacks which will put rotational stresses on the friction hold. Dave's idea of enlarging or moving the holes means both posts continue to hold it rigid and prevent rotation. More work but safer in the long run.
Enjoyed the PCB layout bit you did in the first part of the video! We've been covering board layout and design in one of my college (EE) classes this semester and it's nice to see some real world application... I think I remember having a choculator as a kid, seems like it came from the school book fair
That review of the PCB was excellent and very informative. Its one thing to say "dont do X, Y and Z" while teaching or explaining, but seeing it in a practical example like that makes it worlds easier to understand. Should really do more of these.
The critique of the PCB layout and design was fantastic. Great way to learn from other people's projects, both good and bad choices. Would love to see this more often. Great illustration of redundant components, ground loops suggestions for improvement. Fantastic!
instead of drilling new holes on the banana plug adapter to get to fit other machines just spilt it in half through the middle, wasn't the airgap a clue
Hi Dave! I'm glad, you like my radiosonde and I'm really looking forward to your teardown video on it. The odds of one landing on top of one of your viewers home can not be calculcated accurately, but maybe I can make a very simple estimation: 500,000 viewers each with 200 m² land sum up to around 100km² . A given radiosonde should then have a chance of 1:5,000,000 to land in such a spot. "Thousands per day", may sum up to 1 million per year, so we could expect to have an actual hit once in every five years. Hmm - I really seem to have been quite lucky .. :-)
Another potential problem with the PCB layout are the thermal reliefs on the voltage regulator. You don't usually want these on the thermal pad of an IC as they will reduce the amount of heat you can get out of the chip.
Comment on the PCB, not great idea to have a switch discharging a 100nF debounce capacitor without a resistor in series, the arcing will take its toll.
My old Psion gave me endless hours of fun. Can't recall for the life of me why I bought it or even what I used it for, (it was over 30 years ago) but I do recall spending lots of time playing with it 😄 Mine had the four line display and I even had a couple of expansion packs. Good times!
@7:00 1117 regulators don't like ceramic capacitors on the output, the ESR must be above 0.1 ohm or something like that. A plain 10uF electrolytic is enough on the output.
I'm from Fort Wayne, IN but Leo is just a few short minutes drive from here since I'm on the Northern side of town. Quite amusing that he sent in a Stepped Tone Generator it took me a minute to realize that it was the Atari Punk Console! I've put one together in a SC Johnson Paste Wax can with my Dad when I started university for EET. Latest modification was to add a photoresistor and a 100k NTC thermistor so that you can also get classic frequency fun out of light and temperature changes instead of just using a potentiometer! Quite a powerful vintage sound out of such a small circuit. Sagan would love tinkering with all the pews, boops, whoops, and bleeps of 555 glory!
SidneyCritic ComedyHound we had a board revision with lots of usb problems: devices randomly disconnecting from the hub and so on. Turns out that the lenght of two of the data line traces precisely matched an LTE band, acting as a antenna. Took us months to figure that out.
I am a weather nerd and a electronics nerd, I would love to have a Radiosonde land in my backyard - how cool. Looking forward to the future video Dave.
@@EEVblog hey Dave Jones big fan of the channel here. Off-topic in terms of this comment that I'm replying to. Potential trap for young players here. They might even become a gutser With the ldr. Low Dropout regulator. I wonder if anyone has confuse that with the other ldr. I'm sure at least one person watching whatever videos may have at least once. If they're new to electronics. The other ldr I'm referring to. Is light dependent resistor. AKA photocell. Aka cds settle. AKA cadmium sulfide cell. If they confuse that all the electrons would definitely fall out. By the way how's Seguin doing. As I've said before I know he's the Lego and coding. Have you ever looked into the older we do robotics kit from Lego. That that will work with scratch programming. Could use a Raspberry Pi. As well as that uses USB which with a hub could have boarded one of the two input output hubs for we do robotics the first generation. Also the Raspberry Pi could work with other other ones of Lego wireless devices that have now through Bluetooth. Possibly through a dongle. By the way eventually all that will be open source for the Lego Hardware. Also if somebody were to get ahold of the older 4.5 volt interface a. It could be tied into the GPO on a Raspberry Pi. By the way originally that are faced was intended to be used on the PC parallel port. Is power bi to the pants at least the internal logic. On the input side. Of course there's an AC power adapter for the rest of it. Also with a hat for Raspberry Pi. You could use a a Serial port. DB9 9 connector. Standard serial port. And connect a interface be from Lego. The firmware is known. Articles of how to talk to it. Although from where does need to be unlocked. With a string. That gives you 8 inputs and 8 outputs. Plus one constant power. Between all that it would make one sweet controller for Lego. Using the Raspberry Pi. Possibly be combined with frog PlayStation 3 controller you could do just about anything you want. Automated Lego trains anyone. Also with the right firmware the white doe Mindstorms the original rcx can also be used to digital command control receivers to multiply multiple motors. Also the LEGO Mindstorms rcx uses infrared. Which could be emulated on the Raspberry Pi. You could even wire in LEDs into the gpio of the Raspberry Pi. and use either with the Code Pilot or the other controllers that can accept Ville commands visual light Lake the two actors auxiliary Motors. Or controllers.
One thing I noticed about that first mail bag item is the caps used in the crystal oscillators. The person is using 10pF caps with one crystal and 15pF for the other. Those values seem a bit low.I would have expected (and typically use in my own designs) values in the 20pF to 33pF range. The sound you added to the end graphic is a nice addition.
If that is what the datasheet states use those values (if they do work). The other suggestion would be to try using the same value of caps with both oscillators to cut down on the number of items on the BOM.
Aren't LDOs sensitive to backwards current? I wouldn't normally put smaller cap on the input than on the output, as it is on the diagram at 8:16, but maybe I'm wrong and it's ok to do that?
I think at this point in time 0603 is much more common than 0805. The resistor and diode on the MCP7904 is as recommended by MIcrochip, it prevents a failed chip from pushing current into the battery and potentially causing a fire. 1k resistors in series with wires going to switches is standard procedure, it helps the ESD diodes survive static discharge
18:48 I wrapped about 6" of 16AWG tinned (bus) wire around the B&K posts semi-permanently and soldered my loads onto that. Love a soldered connection whenever possible.
Hi Dave,, great idea of the binding post to banana adapter pcb, if the pcb doesn't register in line with your device... just split the pcb in two... this will also allow you to direct the banana plugs to any desired direction.
Nice PCB review! But one thing to note, some RTC chips do require a specific battery impedance. In that case you would have to put in the additional resistor. One such RTC is the AB0805. Some systems also require a diode (mainly RTC modules embedded in MCUs), which will otherwise charge up the coin cell when external power is available. So... Datasheet! A good read is always worth it.
Nice new logo/outro! BTW I agree with the others about a PCB review series, but people have to send them in. I think the issues to find would get thin if you go after just production boards. Super helpful and will cause me to look at my boards a lot closer.
@Dave About the PCB review and particularly the triple cap on the output, not sure if the maker saw this configuration from a different datasheet, but I had noticed this on another converter and I asked my electronics teacher in college why this configuration was used over a single cap of the sum of the values of the caps, he said this configuration would respond quicker to the spikes than a single big cap.
I'd be more worried about the LDO going unstable due to the low ESR on the 100n cap. The large loop area might actually be preventing it from going unstable due to adding series resistance in the traces :)
Ripped from TI's datasheet: "The TLV1117 device is designed to be stable with tantalum and aluminum electrolytic output capacitors having an ESR between 0.2 Ω and 10 Ω." Yes, some component are just weird like that. What most think will be a good practice for general applications turns out to be detrimental for this particular case. Not the first time I myself assuming that a whole class of components to behave the same and got myself splitting hair trying to debug it. Also, the cap is in the output... .
seems so, but solder looks Ok. On the other side 23:25 it looks like some capacitors are not soldered properly. Had the same issue with a cheap class d amp. After resoldering it works fine and dont stops after some time anymore.
I know that I personally use very small package parts because it means I only need to have one size of that part, and it'll work for practically all things I make and they end up useful on perf boards when I realise I didn't leave room for a pull up/down resistor and need to fit one in
Another solution to the binding posts: Pomona 6203, adapter with sheathed banana socket to spade lug. Not quite as elegantly horizontal as that PCB, though, and it's not dimensioned the same as a standard meter sheathed socket (no inner insulation, longer outer barrel) so it's a worse fit but might have better current capacity if your plug fits it.
Ok but Dave you could also say something about the the thermal conduction of the 4 narrow tracks to the huge square under the voltage regulator. It is better when those tracks where fat or non existing, so you have good thermal conduction.
Dave, not so fast on the Rigol binding to banana solution. The polarity is backwards with the Rigol so drilling a hole in the PCB of the adapter isn't correct unless you unsolder and swap the red and black banana jacks (and cover the silkscreen symbols). XXM5XX in Deltona Florida USA.
Hello Dave !!! Vaisala yes! IBM used systems from this company to monitor and or control the Temperature and Humidity of most of our clean rooms in East Fishkill, N.Y. now part of this site is owned /used by Global Foundries!! Geneva N.Y. is upstate North of New York City by about 200 maybe 300 miles!!!
Dave, any chance you will do a review on a ultrasonic cleaner? I am looking to purchase one and I am still unconvinced after watching others videos. More like in the 200usd range.
Absolutely LOVED the PCB review! Please consider doing more of these, perhaps a regular series, very educational.
Me too - had no idea about the loop issue!
I didn't know LDO's are so touchy. Infact, recently I was wondering why high precision LDO's like the MCP1702 are not used in almost everything ;)
I would greatly appreciate this as a separate series too. Specifically a series oriented towards Open Source project designs sent in by hobbyists and students. Maybe even set that up as a requirement. Like submissions for a new detailed series must include full documentation (Schematic/BOM/OS Code/Design File/Gerber Zip) posted online.
I would also appreciate a few KiCAD oriented tips and tricks (to keep it really OSHW), first time etching design tips versus/transitioning to our first PCB manufacturer versus different PCB manufacturers.
This is probably the perfect timing for a series like this. I imagine there are a lot more people interested in designing our own PCBs now that word of the JLCpcb deal has gotten around. As a hobbyist, I would appreciate a broad multi-part tutorial on the in's and out's of PCB design and development from a professional engineer's perspective. I have been goofing around with my first design to send out, but am reluctant to pull the trigger.
-Jake
Right on!
Well, I rather would love to make a really bad example of 'not doing it'
with lots of example faults, and send it in, if wanted,
but only if EEVBlog would do a regular series of PCB reviewing.
Would that be an idea ?
@EEVBlog, just leave me a message if you want, MWagner@computers-home.de
I really enjoyed the analysis of the first-timer PCB sent in. I kept decoupling close to the pins, but never knew why, and never really gave any thought to loop area, so learned something important today.
giving valuable and critical fair review on a first board project, thats how you learn, and my hat off to ya dave. and to the maker of the board, keep at it.
Note to all shippers, fold note into small square and package with/affixed with the parts you can feel outside the package. Dave hasn't learned to not cut the note, even after all the Mailbags.
Dave, thanks so much for a mailbag segment!! You're probably tired of it, but I love the old mailbag. All the best to you...
LOVED THE TIPS ON PCB DESIGN. I LEARNED SO MUCH! THANK YOU!
Dave, I love these videos. Thank You so much for making them! Even though I’m not an electronics genius, you explain everything so clearly that I get most of the stuff and it motivates me to learn more.
At 20:30 - why not carefully separate the Positive & Negative halves so you can put it on any spaced Binding post setup?
One reason is to prevent "twist". When you tighten the screw terminals, one could twist one into the other and "short out". This will become more likely as you insert and remove the banana jacks which will put rotational stresses on the friction hold. Dave's idea of enlarging or moving the holes means both posts continue to hold it rigid and prevent rotation. More work but safer in the long run.
Slots instead of holes would allow for a range of distances between the binding posts. Redesign!
Enjoyed the PCB layout bit you did in the first part of the video! We've been covering board layout and design in one of my college (EE) classes this semester and it's nice to see some real world application... I think I remember having a choculator as a kid, seems like it came from the school book fair
That review of the PCB was excellent and very informative. Its one thing to say "dont do X, Y and Z" while teaching or explaining, but seeing it in a practical example like that makes it worlds easier to understand. Should really do more of these.
20:30 the problem will be solved if you break it apart into two pieces
Seeing that gap in the middle I actually thought it's designed to be snapped in half. :)
@@techalyzer I think it is for extra insulation, it is a safety gap. But yeah, cool idea to snap it :D
The critique of the PCB layout and design was fantastic. Great way to learn from other people's projects, both good and bad choices. Would love to see this more often. Great illustration of redundant components, ground loops suggestions for improvement. Fantastic!
instead of drilling new holes on the banana plug adapter to get to fit other machines just spilt it in half through the middle, wasn't the airgap a clue
Hi Dave! I'm glad, you like my radiosonde and I'm really looking forward to your teardown video on it.
The odds of one landing on top of one of your viewers home can not be calculcated accurately, but maybe I can make a very simple estimation:
500,000 viewers each with 200 m² land sum up to around 100km² . A given radiosonde should then have a chance of 1:5,000,000 to land in such a spot. "Thousands per day", may sum up to 1 million per year, so we could expect to have an actual hit once in every five years. Hmm - I really seem to have been quite lucky .. :-)
Woah, the new outro is pretty neat
Just to repeat what has been said before but the feedback you gave on the pcb design should be a staple in your videos- fantastic job!!
Smart is the man that sends his PCB design board to Dave.
I believe that them PCB reviews are what many of us need
Hi Dave. Thanks for all your great videos. Im here in Kansas in the good old USA. Mailbag is a favorite of mine.
He is using the default 0603 footprint in kicad, which is suitable for high density pcbs. I would suggest to use ones end with "handsoldering".
Cool! I've waited a couple months for you to get that solder dispenser. Glad you like it
The PCB critique was very informative. Thanks
Great review on the PCB and kudos to its maker.
...18:21 - Rothenburg ob der Tauber, lovely medieval town. Been there in the mid-90's, great memories.
Another potential problem with the PCB layout are the thermal reliefs on the voltage regulator. You don't usually want these on the thermal pad of an IC as they will reduce the amount of heat you can get out of the chip.
hahaaaaaa top notch ending. that was fun. more people should do mystery PCBs that was great.
Comment on the PCB, not great idea to have a switch discharging a 100nF debounce capacitor without a resistor in series, the arcing will take its toll.
My old Psion gave me endless hours of fun. Can't recall for the life of me why I bought it or even what I used it for, (it was over 30 years ago) but I do recall spending lots of time playing with it 😄 Mine had the four line display and I even had a couple of expansion packs. Good times!
@7:00 1117 regulators don't like ceramic capacitors on the output, the ESR must be above 0.1 ohm or something like that. A plain 10uF electrolytic is enough on the output.
I'm from Fort Wayne, IN but Leo is just a few short minutes drive from here since I'm on the Northern side of town. Quite amusing that he sent in a Stepped Tone Generator it took me a minute to realize that it was the Atari Punk Console! I've put one together in a SC Johnson Paste Wax can with my Dad when I started university for EET. Latest modification was to add a photoresistor and a 100k NTC thermistor so that you can also get classic frequency fun out of light and temperature changes instead of just using a potentiometer! Quite a powerful vintage sound out of such a small circuit. Sagan would love tinkering with all the pews, boops, whoops, and bleeps of 555 glory!
That PCB section was really enjoyable and educational. I certainly learned a whole bunch!
Mailbag is the best!
We always hear about component positioning, but never see any proof that it matters. Is there any chance you can do a video that shows it physically.
Possible, but time consuming to get an effective demo running.
SidneyCritic ComedyHound we had a board revision with lots of usb problems: devices randomly disconnecting from the hub and so on. Turns out that the lenght of two of the data line traces precisely matched an LTE band, acting as a antenna.
Took us months to figure that out.
I am a weather nerd and a electronics nerd, I would love to have a Radiosonde land in my backyard - how cool. Looking forward to the future video Dave.
I really liked the PCB review that came up! Prepare your inbox for more PCBs!
Absolutely loved the new outro! Very high-tech. Hopefully it is new or that means I haven't been paying much attention to the end of your videos.
It's new.
Great mailbag Dave. I really enjoyed the pub review. Learned a lot.
"That's Sagan's oscilloscope" - ha! That's brilliant - I wish I had a DSO to play with when I was a kid ;)
Why not just separate the binding post to banana plug converter board at the router groove?
The pcb feedback is gold. As a amateur I've made all these mistakes, then wondered wtf is wrong with my pcb when it has weird flakey behavior.
Where can one purchase the BK Precision Binding Post Adaptors? Thank you
He didn't seem to be selling them
Correct, we don't sell them, sorry!
Why not! I'd buy a couple of sets...
@@alexhauck1776 könnte auch einen brauchen :)
@@EEVblog hey Dave Jones big fan of the channel here.
Off-topic in terms of this comment that I'm replying to.
Potential trap for young players here.
They might even become a gutser
With the ldr.
Low Dropout regulator.
I wonder if anyone has confuse that with the other ldr.
I'm sure at least one person watching whatever videos may have at least once.
If they're new to electronics.
The other ldr I'm referring to.
Is light dependent resistor.
AKA photocell.
Aka cds settle.
AKA cadmium sulfide cell.
If they confuse that all the electrons would definitely fall out.
By the way how's Seguin doing.
As I've said before I know he's the Lego and coding.
Have you ever looked into the older we do robotics kit from Lego.
That that will work with scratch programming.
Could use a Raspberry Pi.
As well as that uses USB which with a hub could have boarded one of the two input output hubs for we do robotics the first generation.
Also the Raspberry Pi could work with other other ones of Lego wireless devices that have now through Bluetooth.
Possibly through a dongle.
By the way eventually all that will be open source for the Lego Hardware.
Also if somebody were to get ahold of the older 4.5 volt interface a.
It could be tied into the GPO on a Raspberry Pi.
By the way originally that are faced was intended to be used on the PC parallel port.
Is power bi to the pants at least the internal logic.
On the input side.
Of course there's an AC power adapter for the rest of it.
Also with a hat for Raspberry Pi.
You could use a a Serial port.
DB9 9 connector.
Standard serial port.
And connect a interface be from Lego.
The firmware is known.
Articles of how to talk to it.
Although from where does need to be unlocked.
With a string.
That gives you 8 inputs and 8 outputs.
Plus one constant power.
Between all that it would make one sweet controller for Lego.
Using the Raspberry Pi.
Possibly be combined with frog PlayStation 3 controller you could do just about anything you want.
Automated Lego trains anyone.
Also with the right firmware the white doe Mindstorms the original rcx can also be used to digital command control receivers to multiply multiple motors.
Also the LEGO Mindstorms rcx uses infrared.
Which could be emulated on the Raspberry Pi.
You could even wire in LEDs into the gpio of the Raspberry Pi.
and use either with the Code Pilot or the other controllers that can accept Ville commands visual light Lake the two actors auxiliary Motors. Or controllers.
Dave: That's not a knife. _That's_ a knife!
Forrest Mims and Colin Mitchell. Probably the 2 biggest reasons I got into electronics as a hobby.
I think this channel has the highest effort per video of any I subscribe to. Loved the PCB review.
+Frank Harding you'd be surprised, I'm a least effort kinda guy :-D
fantastic to see another mailbag .oh and the new graphics are really cool too .nice one dave keep it up
One thing I noticed about that first mail bag item is the caps used in the crystal oscillators. The person is using 10pF caps with one crystal and 15pF for the other. Those values seem a bit low.I would have expected (and typically use in my own designs) values in the 20pF to 33pF range. The sound you added to the end graphic is a nice addition.
Datasheet of the RTC chip recommends 6-9pF for the crystal.
If that is what the datasheet states use those values (if they do work). The other suggestion would be to try using the same value of caps with both oscillators to cut down on the number of items on the BOM.
Aren't LDOs sensitive to backwards current? I wouldn't normally put smaller cap on the input than on the output, as it is on the diagram at 8:16, but maybe I'm wrong and it's ok to do that?
I think at this point in time 0603 is much more common than 0805. The resistor and diode on the MCP7904 is as recommended by MIcrochip, it prevents a failed chip from pushing current into the battery and potentially causing a fire. 1k resistors in series with wires going to switches is standard procedure, it helps the ESD diodes survive static discharge
Where in the MCP7904 datasheet does it recommend that ?
it's not in the datasheet but, ww1.microchip.com/downloads/en/DeviceDoc/20002337B.pdf and ww1.microchip.com/downloads/en/AppNotes/00001365D.pdf
MAILBAG!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :)
Great to see it back.
18:48 I wrapped about 6" of 16AWG tinned (bus) wire around the B&K posts semi-permanently and soldered my loads onto that. Love a soldered connection whenever possible.
That outro is pretty slick!
Checking the pcb was very interesting
Hi Dave,, great idea of the binding post to banana adapter pcb, if the pcb doesn't register in line with your device... just split the pcb in two... this will also allow you to direct the banana plugs to any desired direction.
thank you very much for the review on the PCB design
Nice PCB review! But one thing to note, some RTC chips do require a specific battery impedance. In that case you would have to put in the additional resistor. One such RTC is the AB0805.
Some systems also require a diode (mainly RTC modules embedded in MCUs), which will otherwise charge up the coin cell when external power is available.
So... Datasheet! A good read is always worth it.
Sampling the inputs switches every 30ms or so provides good debouncing. No extra parts needed.
Love the outro logo splash thing. :)
Neat End animation .. waiting for the radio thingy teardown !
like the new EEV graphics , another interesting video . Thanks
Wow, nice detail about that loop area! Today I learned!
Dave, your carelessness in opening packages disturbs me greatly. :)
Mailbag makes me happy.
at 24:28 you can see there's a broken SMD component right above the 2832; perhaps something that's causing it to fail?
Nice new logo/outro! BTW I agree with the others about a PCB review series, but people have to send them in. I think the issues to find would get thin if you go after just production boards. Super helpful and will cause me to look at my boards a lot closer.
Just echoing sentiments expressed elsewhere, love the pcb/schematic review! It would make an awesome segment.
@20:43 Be careful since it looks like + and - are swapped. Drilling a hole will connect the + from the banana plug adapter to - of the rigol!
Yes, i also like the feedback, very informative. If you could do more like this, that would be great :)
22:27 Is that a case of the old "print it out first then hand-ink it later "....I've done that before.
Yeah I sent you one of the psion a year ago, you said then you had them before.
@Dave About the PCB review and particularly the triple cap on the output, not sure if the maker saw this configuration from a different datasheet, but I had noticed this on another converter and I asked my electronics teacher in college why this configuration was used over a single cap of the sum of the values of the caps, he said this configuration would respond quicker to the spikes than a single big cap.
I'd be more worried about the LDO going unstable due to the low ESR on the 100n cap. The large loop area might actually be preventing it from going unstable due to adding series resistance in the traces :)
Low ESR on the input to an LDO makes it less stable?
Ripped from TI's datasheet: "The TLV1117 device is designed to be stable with tantalum and aluminum electrolytic output capacitors having an ESR between 0.2 Ω and 10 Ω."
Yes, some component are just weird like that. What most think will be a good practice for general applications turns out to be detrimental for this particular case. Not the first time I myself assuming that a whole class of components to behave the same and got myself splitting hair trying to debug it.
Also, the cap is in the output... .
Okay on the output makes more sense. I didn't read it right the first time.
@23:56 is that white component upside down
seems so, but solder looks Ok. On the other side 23:25 it looks like some capacitors are not soldered properly. Had the same issue with a cheap class d amp. After resoldering it works fine and dont stops after some time anymore.
Isn't the pot silkscreened lcd brightness controlling contranst on the at 12:41?
The organiser, I used one of them for manufacturing quality control in a factory. Lot of them where used for all sorts of things.
I know that I personally use very small package parts because it means I only need to have one size of that part, and it'll work for practically all things I make
and they end up useful on perf boards when I realise I didn't leave room for a pull up/down resistor and need to fit one in
Love the pcb review!!!
To make that second banana plug adapter you could maybe just cut the board in half.
I really really enjoyed the PCB review, it can be cool if you can do a serie on that !
Really liked that animation at the start of the video
The outro too!
Another solution to the binding posts: Pomona 6203, adapter with sheathed banana socket to spade lug. Not quite as elegantly horizontal as that PCB, though, and it's not dimensioned the same as a standard meter sheathed socket (no inner insulation, longer outer barrel) so it's a worse fit but might have better current capacity if your plug fits it.
Lol @ the "what are the odds" comment - didn't you conclude that the damage to your solar panel was likely a small meteorite in the end?
I want to know how to avoid debouncing without capacitor? How do you do it in your uSupply?
It can be done in software, you program it to ignore subsequent button presses within a certain time window which starts at the first press.
You can actually recekve radiosonde signals with your TV dongle (i have the same dongle it works well as SDR)
What would you recommend for someone who wants to start learning electronics please?
The trace width for the power circuitry could be bigger?
I used to like the Dick smith projects back in the day when Dick Smith used to be a electronic parts store. I don't know if anyone does them anymore.
Ok but Dave you could also say something about the the thermal conduction of the 4 narrow tracks to the huge square under the voltage regulator. It is better when those tracks where fat or non existing, so you have good thermal conduction.
Where can I buy the BK Precision Binding Post Adaptor? :O
Dave, about the protective res. - what if somebody removes the badcap - and inserts a jack for a power supply solution ( like 5v) ?
The binding post adapter, can you just separate the two halves for the Rigol? The "S" shaped cutout looks like it has done most of the work for you.
I really liked the info about the board. Good stuff.
I like the new "grid and oscilloscope trace" animation... that's cool.
I want your "bodge" T-shirt! Where did you get it?
Love the new intro!
Dave, not so fast on the Rigol binding to banana solution. The polarity is backwards with the Rigol so drilling a hole in the PCB of the adapter isn't correct unless you unsolder and swap the red and black banana jacks (and cover the silkscreen symbols). XXM5XX in Deltona Florida USA.
Hello Dave !!! Vaisala yes! IBM used systems from this company to monitor and or control the Temperature and Humidity of most of our clean rooms in East Fishkill, N.Y. now part of this site is owned /used by Global Foundries!! Geneva N.Y. is upstate North of New York City by about 200 maybe 300 miles!!!
I like that outro. Very jazzy
I don't get ads on your videos. Do you not monetize?
So, what is a good book to learn electronics?
How similar is the AMS1117 to a LM1117550?
Dave, any chance you will do a review on a ultrasonic cleaner? I am looking to purchase one and I am still unconvinced after watching others videos. More like in the 200usd range.
I'm fascinated by that big knife... Here in Italy you would need at least to notify the authorities just to own it..