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Yep! Modular but still custom and compact. This is what my buddy wants for his rig, right down to the satin finish instead of gloss.... He has a Fortin NATAS that might be his external drive option.

By the way, I should say... The AMT LA2 series of pedals sound great. I've compared the M2 to recent modeling pedals like the TC Ampworx 800 and V550. These old AMT analog pedals sound better compared side by side. My favorites are the M2, E2, C2 and K2, which are similar in tone but still...

FYI, I have PCB that uses an ATtiny84 to control three latching relays, has 3 inputs (for switches), 2 open collector transistor outputs (for two LEDs) and 3 latching relays. It's for a specific application but is generic enough that it can do this job. It's used in this combo build I posted...

With the bottom switch in the down position, the only option is bypass. The upper switch doesn't matter but shorts input to output in the down position.

FYI, this is the diode-lift switch to remove Octave. I wanted to see a schematic of it... https://fuzzcentral.ssguitar.com/octavia.php Looking at the wiring in post 6, this is what it does: Both switches up: FUZZ, no Octave. FS up Toggle down: FUZZ, With octave. FS down Toggle Up: Bypass. Both...

I've spent an inordinate amount of time creating a combo build with 3 footswitches in a 1590DD case. The picture tells most of the story. I'm happy to share info about it if anyone is interested... I'm wondering if anyone else has any interest in such a thing.... To make this all fit, I had to...

More info needed. Got a schematic of what you have built? I don't know how the present switching is wired, which is the starting point.

I would be happy to contribute what ever I come up with. I presume you do not want anything already available from SnapEDA? For example, I like kemet UA2 single coil latching relays. The footprint and symbol came from SnapEDA and I used it unedited. But, others, I've had to edit for one reason...

The 4305 works great but requires BJT opamps. You cannot use jfet opamps, like TL072. The chiclet linked above and also available at pedalpcb work fine. They use NJM8080 or NJM8068 opamps. This link describes the difference between them...

By the way, all TPA3118/3116 modules have a pair of resistors that determine the gain of the module. Different manufactures may well choose different values for those. Most use the 32db gain setting.

I have PCBs for this if you want. I had 10 of each style built since PCBs are so cheap to have made now. Build doc is here. https://drive.google.com/drive/folders/1iFa5Fe8ZB1ukfYn8xFxkUt--wFWA6nne?usp=sharing

Something is wrong with your circuit. My guess is at least one of the op amps has the wrong (or missing) feedback resistors to set the gain. It should not have enough gain to do this.

Certainly not. The first op-amp stage has a voltage gain of about 9X to get instrument level up to line level into the EQ, which has a significant attenuation. Should not be anywhere near clipping. What signal level are you feeding in?

I suggest using some stereo amplifier you already have and test out the scenarios first with the potential speakers and figure out exactly what you like and what you need in a power amp and speaker setup. Then plan out a build...

Yep. The amp is clean and takes line-level input. The Volume-only and TMB preamps are straight out of typical guitar amps to provide the needed gain and EQ that would typically be applied to a guitar signal. But, it's still only a power amp. These are not emulating any kind or preamp. They are...

Added a subfolder with videos of soldering the TPA3118. Link to the upper level folder: https://drive.google.com/drive/folders/1iFa5Fe8ZB1ukfYn8xFxkUt--wFWA6nne?usp=drive_link Description of the process with direct link to the videos... Videos show the process of soldering a TPA3118 to the...

Minor update to the build doc. I changed all the LED resistors that go to 24V to 100k. 47k is too bright for me. But, you might want different. I suggest testing your LEDs at what ever power supply voltage you choose to make sure the brightness is what you want. I don't like blinding pedal LEDs...

Since the cost of shipping from me to anyone outside north America is more than it would cost direct from PCBWay, I've shared the projects there. At the moment, the Volume-Only boards are showing up but not the others. I think they go through some type of review before going live to everyone...

Since there was actual interest in the 3118 board, I've added the schematic, BOM and links to odd-ball parts to the build doc. https://drive.google.com/drive/folders/1iFa5Fe8ZB1ukfYn8xFxkUt--wFWA6nne?usp=drive_link

By the way, I'm willing to sell some of these, too, but it's kinda pointless with the real ones still available for cheap. I've already soldered the 3118 on all 10 of them. I would have to sell each for $6 as they are (no other components), which is already the same price the real ones. So, this...