Dark Rift Delay - Turns On, Switch Works, but delay is all garbled and pots seem to be in reverse. Looking for help. Audio included.

Jgoldkamp

New member
Hi, I built a dark rift delay, but it's not working.

Here is some audio of me messing with it:
It powers on, the stomp switch turns the LED On/Off, bypass signal is fine. However, when I turn the pedal on, instead of delays I get fuzzy garbage. Also my pots sound backwards (while typing this I googled a working pedal's guts and realize why the pots are backwards now, lol. They are supposed to be installed on the other side of the PCB.).

I tried replacing the PT2399 chip, to no avail.

Any ideas?
 
Def need to see how you have it wired up.

Should be straightforward- compare yours to the one I made a couple of weeks ago and see if anything looks different.

99AD31A3-297E-4366-823D-412B963B85D0.jpeg
 
I'm applying 9V via my power supply and it says the circuit is pulling .092A for .828W

Ok voltages:
pt2399:
1. 7.52v
2. 3.62v
3. 0.01v
4. 0.01v
5. 2.98v
6. 3.61v
7. fluxuates between 4.6v - 5v
8. 0.76v - 0.82v
9. 3.62v
10. 3.62v
11. 0.23v
12. 1.1v
13. .33v
14. 6.6v
15. 3.62v
16. 3.62v
 
LM324 voltages:

1. fluctuating 3v-5v
2. 4.41v
3. 4.41v
4. 8.75v
5. 4.41v
6. fluctuating 4.32v - 4.38v
7. 3v - 5v
8. 3v - 5v
9. 4.4
10. 4.4
11. 0.01
12. fluctuating 3v - 5v
13. fluctuating 3v - 5v
14. fluctuating 3v - 5v
 
Hi, I built a dark rift delay, but it's not working.

Here is some audio of me messing with it:
It powers on, the stomp switch turns the LED On/Off, bypass signal is fine. However, when I turn the pedal on, instead of delays I get fuzzy garbage. Also my pots sound backwards (while typing this I googled a working pedal's guts and realize why the pots are backwards now, lol. They are supposed to be installed on the other side of the PCB.).

I tried replacing the PT2399 chip, to no avail.

Any ideas?
What 3PDT breakout board is that you used? Do the pads match correctly to the pads on the PCB? It kinda sounds like the signal is running through the circuit backwards.

Also, check these connections. Can't quite tell if there is some fray strand of wire on that top connection. I would also "tin" those leads before soldering.

Screenshot 2023-02-09 at 10.26.58 AM.png
 
What 3PDT breakout board is that you used? Do the pads match correctly to the pads on the PCB? It kinda sounds like the signal is running through the circuit backwards.

Also, check these connections. Can't quite tell if there is some fray strand of wire on that top connection. I would also "tin" those leads before soldering.

View attachment 41762
Yes I tin my tips after going through the pcb. There's nothing shorting there I've double checked.

It's not the circuit going backwards I had the pots attached on the wrong side.
 
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