offboard wiring help

[swelchy]

Have a pcb I'm populating by someone else and it came with no documentation. I'm fairly spoiled by Roberts awesome layouts and documentation. I have literally no idea how to wire the switches up on this one. Any help to teach me here would be appreciated.

 

[Alan W]

If I weren’t confused by the “r1” and “s1” I’d feel comfortable attempting this. I figure that stands for send and return, so they’d be the same as PPCB’s “in and out”.

The other issue is, assuming you have one input and one output jack—what does each side do? Are they in series? (In which case does out1 go to in2?)

 

[swelchy]

It’s a Kilt V1 clone

 

[Alan W]

OK. Don’t follow this without thinking about it—it looks right to me, but I am still confused about the labeling on the board. If my guess on the “r1” etc is correct, then I think this should work.

if you have a schematic, look for the final resistor on each side (one end to ground) and see if you get continuity with the “s1 or s2” pads. That should confirm if my assumption in correct.

BUT—I just noticed that there are jack in and out at the top of the board—which is furthering my confusion. Hopefully someone else will chip in. I'm having my doubts now...

 

[KR Sound]

This would be my guess based on how Robert does his. The jack goes to the upper IN then the lower IN goes to the footswitch. Likewise with the OUT on the upper right. You’d want to test continuity to verify which is which- IN vs SEND and OUT vs RETURN.

Edit: actually, flip it horizontally to line up better. One of those two lol ¯\_(ツ)_/¯

 

[Alan W]

This would be my guess based on how Robert does his. The jack goes to the upper IN then the lower IN goes to the footswitch. Likewise with the OUT on the upper right. You’d want to test continuity to verify which is which- IN vs SEND and OUT vs RETURN.

Edit: actually, flip it horizontally to line up better. One of those two lol ¯\_(ツ)_/¯

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This makes sense. I agree about the need to test what S and R mean. I want S to be send, which to me is an out, and R is return, which is an input though. But the order of them makes more sense with those reversed—no crossed wires.

 

[jimilee]

This makes sense. I agree about the need to test what S and R mean. I want S to be send, which to me is an out, and R is return, which is an input though. But the order of them makes more sense with those reversed—no crossed wires.

Send and return. You can use any of Robert’s stomp diagrams. Send=in and Return=out. The numbers are for effect one and effect two. Probably numbered because eagle won’t let you have duplicates. I just go in after the fact and change the labels.

 

[Feral Feline]

No schematic?

This will be the opportunity to learn how to trace a pedal. DMM on continuity and you've got all the values given to you...

Maybe it'll help to look at other schematics of the Kilt, if there are any, and of the Bixonic Expandora.


The Send/Return conundrum might be solved by DMM continuity mode and, armed with schematics and best guessing, you should be able to determine the input cap (1µ on the Expandora) and output cap (100n on the Expandora) traced by Digi2T — wait! That's the 2000R V3 reissue Expandora from Godlyke... MadBean's Dragonbeard is reversed, 100n on input and 1µ output, as is JMK's Expandora. Fuzzdog's Expandotron has 1µ caps for both in and out couplers as does Gustave Smalley's trace.
Well sheepdip BLATMAN! So much for that idea.


Better idea, maybe: Trace it out from the ICs, that way you know for sure what stream flows to the ocean...

As Jimilee said...