I built a landtone delay pedal and it works until you hit the footswitch. Read the FAQ and what to check and came up with voltages for the IC chips. See post below... Anyone know if this indicates anyting that may help me
https://www.diystompboxes.com/smfforum/index.php?topic=126028.0
welcome to the forum,
those voltages are said to be correct, so your voltages should be similar.
also, look at the debug sticky and report back with voltages, the schematic and detailed pictures.
cheers, Iain