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Take a look at the schematic for Chuck's CMOS Overdrive. He has the CD4007 pin numbers on it. You can see how, for example, he's using pins 3, 6, and 10 as inputs (as @mckillacuddy suggested above); pins 2, 14, 11 go to supply voltage; etc. In terms of "converting" a CD4049/CD4069 design to...

As Robert said, there are dual- and single-inverter chips, but they are all in SMD format. I've searched, and can't find any through-hole versions with fewer than six inverters. Edit: clearly I overlooked the CD4007! If it makes you feel any better, the unused inverters, assuming they are...

Shhh, sometimes I point my client to this forum for reference! ;) Those knobs (Boss-style) on the green were specifically requested by him. In fact, he wants an oversized Rate knob so he can easily control it with his foot. I forgot to order the larger knob initially, so that's the last part...

As someone who's coming at this from a "weekend warrior"/pure hobbyist perspective, i.e. without any formal training in electronics, circuits like these are kind of a landmine: while it does appear to be a novel circuit, I think all the questionable design choices make it a poor study for...

Have you by chance measured the current draw when the effect is engaged? There’s a possibility it’s not battery friendly. I seem to recall reading somewhere - this is a very vague memory - that one potential solution for switching pop is to not switch so quickly. So if you’re still getting a...

This is in regards to the Median Compressor. I initially had a similar problem as @ninjagrips as described in this thread. I initially built my Median with some TO-92 2n5457s I had in my stash. But like ninjagrips, I could not get the S-G voltage anywhere near 1.875V. However, in this state...

Referring to the schematic for the Chauffeur Overdrive (Shnobel Tone Daily Driver). If I'm reading the schematic correctly, this circuit uses a 7660SCPAZ charge pump to generate a negative power rail. And then all the RC4558 opamps are powered with a bipolar supply. So far so good. Assuming...

I like everything about this build! DIY PCB, shielded input/output wires, kickass custom graphics, clean overall build, fun-to-read writeup! More please!

Just an update. I don't have this process fully fool-proof yet. I used the new glue on two more enclosures, see attached photo. For the pink enclosure, I got most of the image to transfer. But you can see bits of the border didn't transfer, and some of the button labels. For the green...

Thanks again for all the help and suggestions! He ended up going with the Aion Emerald / Boss PH-1R. I just finished the client's build, and built a second for myself. Build report here. Thanks again everyone!

My client (my one and only client!) requested a phaser. He wasn't sure between a Boss PH-1R or EHX Small Stone. But, as always, the community here was extremely helpful. We ended up going with the Boss PH-1R clone via the AionFX Emerald Resonant Phaser project. It's a fairly densely-packed...

Duty Calls.

Just to hopefully add to the conversation, there are some pedals that use a simple capacitance multiplier for further filtering. I don't know if all Boss pedals do this, but many of the schematics I've looked at include one, e.g. OD-3. The Chauffeur Drive has an interesting power supply, which...

To be pedantic, there will be some current-dependent voltage drop due to RDSon. But as in temol's examples above, having a series resistor is useful for creating the low-pass RC filter with the bypass cap. Another alternate solution for reverse-polarity protection is a diode between Vin and...

There's a few folks around here who do "stacked PCB" builds, with a custom bypass board that mates to PCB-mounted input/output jacks. The actual effect circuit is directly below the bypass PCB. So in bypass mode, the effective wire length is roughly the width of the pedal. But I agree...

@Stickman393 - thanks, that's really useful info! You didn't mention it, but I'm guessing that over time, wear and tear on the contacts (via arcing, or maybe even just friction) will cause the bounce behavior to change somewhat too? Now I've gone down a SPST momentary rabbit hole. I think I'm...

There is plenty of open-source code for microcontrollers. Shamelessly linking my own code, and the credits and links section of my README has links to other open-source implementations. I'd argue the only really tricky part of writing simple on-off mcu code is the debouncing, and that's a...

Random thoughts… I prefer soft-touch switches, either for use with a relay bypass system, or even a Boss style electrical switching scheme. But that’s my personal preference. To those who prefer mechanical 3PDT I say cool! (Unless they don’t post gut shots of their builds, that’s not cool! 😎)...

Edit: see the great, more comprehensive tutorial on these waterslide decals by @Guardians of the analog (GOTA): The 2026 revised film free decal tutorial. What follows isn't intended to be a tutorial, but more of a living notes document, particularly with regards to using Sunnyscopa's new...

This is my build of the Aion Cepheus Amp Overdrive based on the Cornish CC-1. Aion's description of this pedal and Cornish pedals in general is good; he goes into even more detail in the tracing journal. The same board can be used to build the higher-gain GC-1; Aion's build docs have the BOMs...