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Hey folks, so given that I'm sure these FNIRSI devices have popped up on people's radars I thought I would share my experience with the DSO-TC4, a combination signal generator, oscilloscope, transistor tester. I purchased this device primarily for the SigGen and Oscope abilities. There are a...

Hey folks, I have a question about using CMOS switching for potentiometers. (CD4053 in this case) I want to build a pedal that is a Tube Screamer and a SD-1. Both circuits will be on the same PCB, but I want each to be a "mode" with a push button (in this case because I like to build "studio"...

*Renamed the thread as it is primarily about FET designs. Hey folks, so I've been reading Merlin Blencowe's Designing Guitar Preamp book. One thing that has interested me is the effect of essentially a poor design leading to some current leaking into the grid of the follower and therefore...

Has anyone here used an STM32 as a microcontroller for switching? The reason I ask is that JLC has a few as a basic part for assembly. Just wondering how easy it is to program. I'm guessing you would need pins on the pcb in order to flash the firmware onto it. ESP32 boards are cheap on...

Hey folks, I tested a bunch of cheap transformers for use in pedal design. I won't replicate the post here, the full thing is over at GroupDIY. I think the Hammond 142 series one are the most interesting. Despite claiming a frequency response of 200 - 15khz they actually extended all the way...

Does anyone here use LiveSpice? I like that you can change components and instantly hear the effect and feel by just playing your guitar, also allows useful stuff like adding power amp sim and cab IR afterwards if you use the VST version. The only problem is, the component selection is quite...

Hey folks! So some elements of my circuit designs get a lot of use, like this JFET buffer for instance. What I want is to be able to save this as a component so that I can just add the whole buffer circuit to a schematic and have it pre-laid out once I go to the PCB layout phase and have all...

Might be a weird request, but did anyone ever get a copy of ToporLite, I guess preferably v7. Seems impossible to get off the internet now as the Emerex site is really badly maintained and they've moved on to this Delta Design platform.

I'm thinking of getting some daughter boards printed for SMD Fets, Op-Amps, and other SMD stuff. What is the most economical way of getting them printed? Do you create your own pannel boards or do you send the small PCB and have JLC or PCBway do pannels for you?

I've looked at the spec sheet for this part. I see it has a maximum input voltage of 30v. But does it have a minimum voltage? For instance if you fed it 9v would it output 12v still? Or do you need to supply it at least 12v?

Anyone seen the inside of the new Revv Anniversary edition pedals and seen what they changed? Was thinking of doing a modified build to compare.

Hey folks, I'm just dipping my toes into designing my own circuits so I could use a little bit of help here. I tend not to put tone or volume controls into my guitars, preferring the pickups to go straight to the jack, maybe via the selector. Occasionally this leaves the guitar with too much...

Hey folks, so I'm building a 5 way splitter using the JFET buffer boards. But I have a question as to the best way to parallel them. I'll mostly be using it during re-amping but could occasionally plug my guitar straight into it. Secondary question I guess but I have a bunch of 2N5458s. Is this...

Has anyone ever modded a gain reduction indicator into their compression pedals, either by several LEDs or a single one that gets brighter the more gain reduction is occuring. If so how did you do it. Which pedals.

I don't remember which site, but one of them had mouser project lists available for their PCBs. I think this would be an amazing addition to the site. Maybe it would be too much work for PedalPCB themself, but maybe we could crowd source and have verified lists or something. It would save a lot...

Am I right in thinking that the D3 and D4 diodes in the Thumb Sucker circuit are pseudo gain reduction meter LED's as I think is mentioned in the write up by the circuit designer? If so thinking of mounting them so they're visibile when I build it soon, probably by wire as the POTs would be in...

Hey folks love this community. Some very creative people! I know this is mostly a guitar pedal focused kinda place but was wondering if anyone had knowledge on mic pre / compressor circuits etc. I'd love to build a relative budget channel strip type thing for podcasting etc but really lack the...

This would be a great utility circuit to have to create say a standalone JFET buffer or other similar utility that requires power but might not be part of another pedal build that has this circuit built in. An always on buffer at the end of the pedal chain would be pretty useful to have.

These pedals are under-rated gems in my opinion. Great JFET based "tube like" preamp pedals that sound crazy close to their inspirations when used in the FX loop. I think the R1, P1, S1 etc would be the best as I don't think most people care about the extra clean amp or cam sim circuit from the...