I'm right now building the Tremulus Lune, but I'm having some trouble getting the wiring correct for the 3PDT Stomp Switch from DIY Stompboxes.
I look at the schematic for the NPN wiring of the switch, is that the one to use? 'Cause when I compare it to the picture of the Tremulus guts in the project page, it doesn't match.
Oh, and have I got it right if I think the input signal is together with the +9VDC onto the PCB?
Perhaps I should say that I'm building almost an exact copy of the one in the project page, with both battery and DC jack.
There's an equally simple way to bypass the Tremulus using a DPDT switch. One pole switches both the LED's ground connection on/off, the other pole switches a resistor in parallel with the LDR in/out. The resistor should be equal in value to whatever your trim pot is set to.
This project doesn't require true bypass with this switching since the circuit acts as nothing more than a buffer when the effect is off. If anything that is a desirable thing that will improve your tone through any following effects!