No wet output on Circulator

kliptor3

kliptor3

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I'm new to pedal building, so please excuse any ignorance. I built a Circulator using Tayda components, and I have no wet output. LED lights up when activated, but no sound comes out. Dry output works.

I did initially get the polarity backwards on the 9v input power jack, would that have fried any of the components?

This is my second attempt at building the Circulator, and the first one had the same problem, but I elected to redo everything with brand new PCB and parts because my soldering wasn't the best on that attempt. I must have done something wrong if it's happened twice in a row, but I'm not sure where to start.

PXL_20220225_171359567RESIZED.jpg PXL_20220225_171323617RESIZED.jpg
 
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fig said:
Can you verify R28 as a 220KΩ?
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I'm colorblind, so I can't read color codes very well, but according to my gf, the bands are [red, red, black, orange, brown], which should be 220k. I also measured every component before I put it in.

Is it worth taking it out to verify?
 
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kliptor3 said:
No, I'm new to electronics so I wasn't sure where to start. I'll begin with that. Is Vref supposed to be 9 volts?
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Yes. Vref is 9v in this case. Attach/touch the negative lead of your meter to any ground point or the negative in of the power jack and then use the other lead to check Vref against the schematic. If that checks out, put your meter in continuity check mode and check ground to ground through the schematic too. That's a good place to start.
 
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UPDATE: It seems the black (output) wire from the breakout board was not connected. Having resoldered it, my circulator now seems to be working!

Sorry to get you guys involved for something I should have noticed much sooner, but you've given me some good directions to head in if I ever run into an issue like this again.

Much appreciated fig and TravisM.
 
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kliptor3 said:
UPDATE: It seems the black (output) wire from the breakout board was not connected. Having resoldered it, my circulator now seems to be working!

Sorry to get you guys involved for something I should have noticed much sooner, but you've given me some good directions to head in if I ever run into an issue like this again.

Much appreciated fig and TravisM.
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Way to go!

I thought the black wire on the foot switch looked strange but I figured it was just longer then the other and sitting at a weird angle. I'm glad you got it going. I would recommend that you buy DIP sockets for your ICs in the future. Tayda sells quality ones for cheap. That will at least let you salvage IC's without too much trouble while you skill up in soldering. I use the tooled IC version. You can always solder the chip into the sockets later if you have any trouble with the chips becoming loose over time, but I have not experienced that myself yet.
 
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kliptor3 said:
I'm colorblind, so I can't read color codes very well, but according to my gf, the bands are [red, red, black, orange, brown], which should be 220k. I also measured every component before I put it in.

Is it worth taking it out to verify?
Click to expand...
No I wouldn't do that, LOL! It's hard for me to see some of those colors...glad it's working, good catch! :love:
 
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