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But I'm also getting a beep between ground and BI or board input.  Is that correct

Yeah, if it is in bypass, the input is grounded. It shouldn't be grounded when the pedal is engaged, though.


Madbean has a great explanation about footswitch wiring here:

https://www.madbeanpedals.com/tutorials/downloads/MBP_FootswitchWiring.pdf

@NorthCoast: yes, the LED flashed once the first time i pushed the 3PDT switch.  i'll replace that resistor leg with the 2.2k ohm resistor now and see if i get anything, but i fear i've blown some components.

Ah, ok, if it flashed quickly, and then went off while there was still power to the circuit, then that flash was the LED getting too much current due to the lack of a current limiting resistor, which is what RLED is. The LED is blown and will need to be replaced.

Apologies for my newbie-ness

Not at all!

2) Also, on the 3PDT board, it looked like a white LED was supplied with the kit, so I used a resistor leg to short across the RLED pads.  But I notice now that I have one 2.2k resistor left over from the kit - should I have used that in the RLED spot?

Yeah, the LED needs a resistor. Did it ever light up?

https://www.youtube.com/watch?v=RPDjlRKO_Q8

Happy Birthday!! Thanks for being awesome!!

Try this circuit.

Connect "IN from LFO" to the output of the LFO. I'd need to see the layout or schematic to be more specific, but it would be the same place where the 100R resistor connects to the LFO.

R2 sets the LED brightness. You might need to go higher or lower than what is suggested.

The transistor can be any NPN such as 2n3904, 2n5088, etc.

Hi Luke!

Bass players Unite!

This thread needs some bass player love:

https://www.youtube.com/watch?v=iN42uzNFVmQ

Did you include C101?

The 47uf cap is C100, which is 100uf on the schematic, but I don't see a 47uf C101.

Also, it looks like there might be two traces that are touching that shouldn't; I've circled them in yellow:

I'm guessing it's this one?

Congratulations, Jimi!!

Very nice! Sounds great.

Did you insulate the antenna from the enclosure, or is that a plastic enclosure?

That's great! You're welcome. I'm happy to help and glad that you got it working. Would be great to see a build report!

Congratulations Jimi!!

It looks like you used a pair of B2K pots where there should be B25K pots.

Take a look at the intensity and throb controls.


Also, be careful bending the legs of the pots, after 5-10 wiggles back and forth, they'll break.

Nice! Always excited to learn something new! Since I have a signal passing through the circuit and the fuzz side is working, what are the components controlling the theremin(still learning how to read schematics)? Just so I can narrow my search.

I'm assuming it's this section...

Yes, that's it.

Also take a look at R12 R13 R15