True Bypass work?

[ori1122]

I made it with reference to the wiring diagram below.

 

[Locrian99]

That is quite possibly the most confusing true bypass set up I've ever seen.

I typically attach pins 1 and 8 aswell but that makes so much more sense than that one you posted.

 

[Fama]

I also use that one (I think it's in all the PPCB docs too). The original PCB posted would have worked fine, the only comment I have is that the pins are usually "Input, pedal/board input, ground, LED, pedal/board output, output" in that order more or less, so you might want to stick with that yourself too. It's up to you of course, if you want to do it differently it's probably fine, but if you use some other variants from time to time it might be less confusing to do the same thing.

 

[pricklyrobot]

Here’s the PPCB one (with the PCB In grounded on bypass). Works, easy to tell what’s going on at a glance.
But if you want to reinvent the wheel in a way that makes more sense to you…

 

[phi1]

That is quite possibly the most confusing true bypass set up I've ever seen.

I typically attach pins 1 and 8 aswell but that makes so much more sense than that one you posted.
View attachment 106148

Pedalpcb is the same except link 1-8 to ground the pcb input in bypass.

Ori managed a scheme where both the pcb in and out are grounded, interesting. I’ve never encountered and issue with the pedalpcb way

 

[Fama]

Pedalpcb is the same except link 1-8 to ground the pcb input in bypass.

Ori managed a scheme where both the pcb in and out are grounded, interesting. I’ve never encountered and issue with the pedalpcb way

I don't think having the output hanging makes much of a difference since the input is grounded anyway. But maybe there could be some edge case where grounding the output might also be slightly better?

 

[ori1122]

I also use that one (I think it's in all the PPCB docs too). The original PCB posted would have worked fine, the only comment I have is that the pins are usually "Input, pedal/board input, ground, LED, pedal/board output, output" in that order more or less, so you might want to stick with that yourself too. It's up to you of course, if you want to do it differently it's probably fine, but if you use some other variants from time to time it might be less confusing to do the same thing.

Thank you for your thoughtful response! I appreciate the advice on the pin order. I’ll make sure to follow the standard sequence of “Input, pedal/board input, ground, LED, pedal/board output, output” to keep things consistent, especially when using different variants. Your input is really helpful!

 

[Robert]

But maybe there could be some edge case where grounding the output might also be slightly better?

I've seen a few circuits that ground the circuit output in bypass, although usually only briefly while transitioning between states. A couple of the most recent MXR stuff I've traced grounds the input and output in bypass using FETs.

I'd be hesitant to blindly ground the output of any circuit though... it could cause issues in a circuit with a low impedance output. (For example, a circuit with buffered output or intended to drive a speaker or headphones)

 

[Fama]

I'd be hesitant to blindly ground the output of any circuit though... it could cause issues in a circuit with a low impedance output. (For example, a circuit with buffered output or intended to drive a speaker or headphones)

Yeah I thought about adding that there could also be some possible downsides, but I'm just guessing my way around electronics to be honest, so it's good to hear from someone more experienced that at the very least it's probably not a good idea to start blindly grounding all outputs for pedals I build