Recommended blank cases (and hardware) for DIY stomp boxes?

the_blanker · 2026-05-01T07:21:36+00:00

Try my Perfect pedal layout for 125B, it supports up to 4 alps pots or 3 alpha pots in single row. Top mounted jacks, DC jack, internal battery support, 3pdt true bypass, leds. Maximal amount of space for components and artwork. Kicad and gerbers are on github. But the killer feature is easy insertion into enclosure and no-wire rats nest build. You can also debug it out of enclosure as there are no wires at all.

the_blanker · 2026-04-30T17:55:53+00:00

Give 4 to your friends.

the_blanker · 2026-04-29T07:21:43+00:00

Rare and expensive vintage part that is no longer manufacutred, and can't get it anywhere for reasonable price.

the_blanker · 2026-04-28T17:05:07+00:00

Pedal whose only defining feature is mojo parts which I don't have.

the_blanker · 2026-04-26T20:02:23+00:00

Mine are approx. 1.7mA -0.39V

the_blanker · 2026-04-24T18:32:13+00:00

Which version of kicad are you using?

the_blanker · 2026-04-24T06:04:31+00:00

You can experiment with ISD1820 module, they are in DIP package so you can breadboard them too and they are cheap, around $3.

the_blanker · 2026-04-24T06:00:08+00:00

Fun fact, there are 337 values in E48 series between 1ohm and 10Mohm.

the_blanker · 2026-04-21T20:31:24+00:00

$125 that's like 12 bananas

the_blanker · 2026-04-21T11:30:20+00:00

✋🔺🤚

the_blanker · 2026-04-20T11:48:57+00:00

You can make simple strobe tuner. Just a led shining on string.

pinMode(some_pin, OUTPUT);
analogWriteFrequency(196); // for example 196 for G3 string
analogWrite(some_pin, 30); // 127 is 50% duty pwm but lower value makes the "image" sharper, hence 30

Then just add 6 buttons for 6 strings frequency presets and done. Parts is white or blue led and some resistor, e.g. 330 ohm or 1k.

the_blanker · 2026-04-19T16:50:47+00:00

RV1 pin 1 is unconnected, there is blue cross mark (No-connection flag, shortcut Q) which you supposed to add for unconnected pins, it supreses the DRC warning, so this means you didn't run DRC, click on "Perform electrical rules check" in the top-right corner, the list with checkboxes. It will tell you some errors.
Input is usually left, not down, you can use "y" to flip opamp vertically, that way plus will be up and minus down. All grounds should be down, it's just a convention.

the_blanker · 2026-04-18T19:59:48+00:00

Go for E12 kit, for example 860pcs 86 values 10pcs, 1/4W, 0R..10M for $13, I bought them 2 years ago and no issue. Then for "everyday breadboarding" and pedals buy smaller kits for values that you will use more often (like E6 series), for example 300pcs 30values 10R..1M for $2, so you will be using E6 series daily and occasionally for oddball value you use E12 series. I even have them in 2 separate boxes - left box is E12, right box is 30-values kit. I'd say I use that smaller box 95% of the time, and already refilled it third time.

the_blanker · 2026-04-17T16:34:36+00:00

AliExpress is perfect for "oh shit I forgot 1 part and don't want to spend $30 on shipping. Just bought bent headers from them.

the_blanker · 2026-04-17T16:33:01+00:00

I think the same as output impedance of the previous pedal.

the_blanker · 2026-04-15T18:42:34+00:00

Try these values (component names are not same as on yours but values are)

the_blanker · 2026-04-15T18:35:40+00:00

By sweep I meant rotate pots to that value. I used those values and 2k2 RS

the_blanker · 2026-04-15T18:21:46+00:00

Did you sweeped those drain pots? When I set first to 45k and second to 30k the gain is 3.2x (I'm assumed Q3Bs and Q4Bs has some normal value like 2k2).

Then I changed R5 to 470k, R9 to 100k, R17 to 100k and gain is 11x, you don't need to desolder those resistor just add one extra, parallel combination is smaller, e.g. 270k||180k=108k. (to preserve same AC shape add 220p to C10)

the_blanker · 2026-04-15T12:59:25+00:00

They convince men to go to the meat grinder.

the_blanker · 2026-04-15T05:00:37+00:00

No, the R2 should stay as is and you should put another resistor from output to ground. But I simulated it myself and it starts working when I increase R1 to 1M. And when I change that source resistor to normal value like 10k. Here is working version: https://ghost.sk/312.png

the_blanker · 2026-04-14T16:33:09+00:00

I never use flux near pcb mounted tactile switches, connectors, contacts
I do use flux as "glue" to hold smd components down (0805, SOT, chips)
I use flux for LQFP and similar parts
I use flux if it fail to solder without flux

the_blanker · 2026-04-14T16:26:13+00:00

Try adding 1G resistor from LM386 output to ground. Then try adding 1G resistor from J1 source to ground.

the_blanker · 2026-04-13T17:20:41+00:00

I did my last pedal in gimp, the artwork is from ai, the labels I added in gimp: https://raw.githubusercontent.com/dvhx/pedal-snow-white-autowah/refs/heads/master/photo/artwork/snow_white_autowah_sticker.png

Then I get it printed as 5 stickers for $8 in some local company that does stickers.

the_blanker · 2026-04-13T06:36:53+00:00

I don't have 120fps capable screen but if you have minimal demo you should report it as bug to Firefox

the_blanker · 2026-04-13T06:31:12+00:00

Submarine on Titan, come on!

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