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I am building the spring reverb pedal with BTR3 module for a school project. The light functions when the cable is plugged in. I get audio when the light is off, when light is on there is no audio and no effect. I am attaching pictures and my measurements from my op amps and reverb module.

Op amp1:
3.57
3.56
3.54
0
0.95
0.96
1.45
7.1

Op amp 2:
3.54
3.54
1.67
0
3.49
1.24
6.49
7.09

Reverb:
5.02
0
3.53
0
3.33
3.33'
2.54
2.51
2.54
2.52

I am concerned that the reverb pin 6,8,10 are showing voltage when I think they should be zero?

Any ideas on things I can check next? I'd really appreciate it, my deadline for class is approaching.

Several of your voltages look squirrelly. How are you powering the pedal--battery or power supply? If the former, is it a fresh battery (+9.0V or better)? If the latter, what kind?

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

I am using a 9v battery. My battery isn't a fresh battery so I got a new one today and here are my updated measurements.


Battery before use: 9.66

Op amp 1:
4.6
4.58
4.54
0
0.98
1
1.46
9.08

Op amp 2:
4.53
4.51
2..12
0
4.44
1.31
8.39
8.99

reverb:
5.03
0
4.47
0
0
4.2
2.54
2.52
2.54
2.52

Battery after use:
9.28

This drop was just the time it took to measure the chips.

Your op amp 1 voltages look good, but op amp 2 still shows some odd voltages. With a fresh battery, that IC should show ~4.5V on pins 1 - 3 and 5 - 7. I would suggest referring to the PCB map and schematic for the pedal in THIS THREAD, about 3/4 of the way down. Note that what you've referred to as "op amp 1" is IC2 on the schematic & PCB map, and your "op amp 2" is actually IC1. I would suggest reflowing the solder joints for all the socket pins for IC1 as well as the solder joints for all the components that connect directly to that IC. While you have the PCB out of the enclosure to do that, take a photo of the solder side of the PCB and post that, please. The reverb module covers a lot of the back of the PCB, but it never hurts to take a look at the solder joints that are visible.

BTW, You may want to recheck the voltage on pin 5 of the reverb module, which should be the same as pin 6 (as it was in your initial voltage readings) and not zero as you've reported here.

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2