DOD 210

[Joshhr]

I’m trying to troubleshoot a perf board I’m making for the DOD210. I attached what I used; however some other diagrams don’t have the diode (4001) and 47uf capacitor. What are their purpose here?

 

[Coda]

the diode (4001) and 47uf capacitor. What are their purpose here?

Is that a power filter?

 

[benny_profane]

Is that a power filter?

Yep. Polarity protection and power decoupling.

 

[Joshhr]

Should the 9v pass through the positive side of the diode first? Like the image I attached this time?

 

[benny_profane]

The first has an 1n4001 reverse-biased to ground. This will dump power to ground (and may destroy the diode in the process) if wrong polarity power is applied. The second has a forward-biased 1n5817. This will block power from entering the circuit if wrong polarity power is applied.

Both are correct and will get the job done. The first incurs no voltage drop, but is potentially destructive to the diode. The second incurs a small voltage drop but is less likely to result in the destruction of the diode.

 

[Joshhr]

The first has an 1n4001 reverse-biased to ground. This will dump power to ground (and may destroy the diode in the process) if wrong polarity power is applied. The second has a forward-biased 1n5817. This will block power from entering the circuit if wrong polarity power is applied.

Both are correct and will get the job done. The first incurs no voltage drop, but is potentially destructive to the diode. The second incurs a small voltage drop but is less likely to result in the destruction of the diode.

Thanks

 

[Joshhr]

One more question (for now ) ime trying to but a cabsim right after the pre amp I posted earlier. Do I need to add diodes to control the power between the circuits? Normally, PedalPCB has similar power set up but these perf diagrams aren’t set up like them.

 

[benny_profane]

If you're connecting each to the power input (i.e., the power jack), then yes. If you're providing power from a daisy chain from the other protected/decoupled power line (i.e., after the protection diode), then not necessarily. However, I'd suggest building them as shown and connecting each to the power jack just to simplify things and reduce the probability of error.

 

[Joshhr]

Thanks. That’s what I did. Must be a different issue. I’ll keep troubleshooting

 

[benny_profane]

Thanks. That’s what I did. Must be a different issue. I’ll keep troubleshooting

What issue are you having?

 

[Joshhr]

No sound. Neither side of pedal is working right now. I’m running an audio probe later and looking at voltage.

 

[benny_profane]

To better help you, you should make a thread in the troubleshooting section with clear pictures of your board(s) and the layouts you're working from.