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Did you ever have to find a power short circuit on a board with dozens, if not hundreds of little power decoupling caps all over the place? And they all look fine! How do you find the culprit? Wherever you measure across power, it's a dead short. Or is it? Not if you use a milliohm meter...

I thought I'd share this simple but very well-performing inline buffer/booster. It's intended to go onboard, but nothing's stoping you from using it as part of some other circuit, pedal, whatever. I made it following a request from a European luthier who found a very good sounding, but lower...

Does anyone know what is the right way (or if there even is a proper way...) to display two boards at the same time in the 3D viewer to check for fit? (one of them plugs into the other). So far the only way I managed to do something like this is to save one board as a STEP file and load it as a...

Just curious what others think about this. Is 0.5sec long enough to cover almost all real-life situations where a delay effect is needed? Or maybe 1sec? Or is that already in looper territory (not interested)? Emphasis on real playing situations, real songs, in a band/gig, not just as a party...

Has anybody here dealt with any China to North America freight forwarders? Definitely something economic, not an express courier like DHL, FexEx etc. They want C$1000 for a 15kg box worth $400!

Input buffers, flat boosters, EQ'd boosters - they can all be built around the same basic template consisting of a noninverting op amp and a few passives around it. I did just that, using a DIP switch for set-and-forget settings and an ON-ON-ON toggle to go between 3 main operating modes...

Somebody was complaining in another thread about a lack of demos, something along the lines of "if you don't put up a demo, your pedal is shite, or you can't play, or both". Paraphrasing heavily here, but anyhoo, it inspired me to get off my butt and make a video demo. Behold the JTEX Rock...

Here's a little bass boost idea that could make a useful building block somewhere. I already have it onboard a couple of basses, where it complements my filter-based preamp, which has no LF control. I used to do this circuit with a pot, but ran into space issues in my G&L L-2000's packed control...

Quick demo of an original 1980s Bass Rockman (I just rehoused it). Chorus on, Distortion on. Recorded off the air with a phone, so it sounds a bit tubby. https://forum.pedalpcb.com/media/br-mp3.51/

Just discovered OPA1688. A great opamp that happily drives 16 Ohm loads at super low distortion and low quiescent current. I can't believe I wasn't aware of this not-so-new chip, being a TI fan and having spent quite a bit of time researching headphone amp options. Damn me! In my own circuits I...

Did anyone play around with the supply voltage to see if it still works at less than the recommended 3.3V? I'd be very interested to know how a lower suppy voltage affects (reduces) current draw. Background: a PT2399 is specified at about 25 mA current draw at 5V, with a minimum allowed 4.5V. I...

Here's a quick demo of Rock Mania's PT2399 delay "overclocked" to about 0.6 seconds. That's about as clean as I could get the repeats at this 2x-out-of-spec delay time. I don't have experience with other PT2399-based delays, so I am wondering if it can get better than this. I kind of doubt it...

I think I'm finally ready to come out of the deep, deep Rockman-related rabbit hole. I'll leave some of my schematics here in case they are of interest to someone. No need to trace my stuff :) The bulk of my work ended up in the form of modular analog engine that I called RockBrain (formerly...

Did anyone by any chance run into potentiometer bushing thread adapters? Specifically, I'm looking to convert some skinny, short bushing pots (M7x0.75 by maybe 4mm long) into guitar-style, 3/8-32, 3/8" deep bushings. Or, do you have (access to, or pointers to) a machine shop? I need lots. I'm...

This is how I usually practice at home. Lazy AF. Rock Mania (and Shockman before it) was born out of laziness. The quickest way I could think of to pick up an electric guitar and start playing.

At long last, I managed to put together a production-grade unit. Rock Mania is the much more polished successor to my previous Shockman. I only ever made a handful of Shockmen, as I felt that it wasn't complete without either a reverb or delay. Rock Mania now adds a PT2399-based delay, and...

I'm thinking of making an onboard "activator" for passive guitars as a JTEX product. It's a very low noise and low power active buffer with a 3-way mode selector: 1. transparent buffer (unity gain, flat frequency response) 2. booster (same as 1, but with added gain (adjustable) 3. treble boost...

The Cheat: use an ATtiny chip to drive latching relays directly! Yes, it works, it can put out enough juice, I use it every day, just as seen below. No, you don't even need protection diodes across the relay coils. The chip has them built-in. Some ATtiny chips are available in DIP packages, if...

Does anyone know a good way to print a Tayda drill template (from their Tayda Box Tool) on a piece of paper, to 100% scale? I really want to lay it on top of my already hand-drilled box to make sure I didn't eff something up before placing an order -- and it has to line up precisely.

Here's a little step-by-step tutorial explaining how to make a low profile, no contact, smoooooth feeling magnetic footswitch that should outlast us all. It took me a while to come up with this process, but it turned up so well that I feel it's worth sharing with the community. 1. Start with a...