Signal Generator

Awesome - thanks!

This and the metronome work great - led blinks, sound works on my newly assembled pedal shield.

However, when I try any of the effects that take the guitar input, I get nothing. How can I test to confirm I have it built correctly? Also, when I hit the foot switch, the guitar works through the pass-through to the amp.

Thanks for your help and what a great project you have here!

If you can load the metronome and the led blinks and you can adjust the speed and tone means that the output stage is working and you can read the ADCs properly.
This are some ideas to troubleshoot the problem:

• Double check that your top/bottom board looks the same as the one in the picture: www.flickr.com/photos/electrosmash/11155820805/sizes/h/
• Look for shortcuts of unsoldered joints.
• Check that the ICs are correctly placed.
• If you have a multimeter you can verify the voltage at the pins of U1, just pedalSHIELD connected to the computer, with no guitar or amp plugged should be:
  pin1: 1.6V
  pin2: 1.6V
  pin3: 0.1V
  pin4: -5V (-4.5V is also fine)
  pin5: 1.5V
  pin6: 1.6V
  pin7: 1.6V
  pin8: +5V (+4.5V is also fine)
• Try adjusting the RV1 potentiometer (I normally place it in a mid position).
• With any code loaded (it does not matter), if you activate/put down the mix switch (left one), you should listen the clean guitar (pat of the guitar signal bypass Arduino and goes to the output mixer directly).

Let me know about your progress!!

Success!

Thanks for your help again. I tracked it down to I had flipped two of the capacitors around the 1uf and 4.7uf. They looked identical and were loose so i never even looked while following the .pdf instructions. I saw the difference when looking at the schematics and your labeled photos.

The two on the left are the ones I swapped.






JR - you are the MAN! Thanks!

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