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Hi Edwin, Yes, I took it apart. The 3.2 volts on the main board was going straight to ground. So it was dead with board power. As I say, the teensy powered up via USB and definitely at least partly working. As it happens I was using a current limited power supply set at 100ma. In...

Hello Cor, that is very neat. I hope the noise levels are reasonable. I plan something very similar but am trying to put use sockets so I can remove either board it goes pear shaped again. I found some extra long headers which should allow that. I will post a photo if it works. Jim

Hello Edwin, thank you for getting back to me and so quickly. The teensy seems to be OK as far as I can determine, no way to test all the pins though without the circuit working. I concluded it was probably the audio board but I cant be sure. Thank you for the advice, I will try with pin...

Hi, I could use some advice on building the detector with Edwin's excellent PCB. What difference would it make in practice if I mounted the audio board and teensy with pin headers and sockets on the reverse of the PCB rather than using the resistors? I understand I would expect more noise but...