Neat project! I don't think I've seen PET film used as a sensor before. I started looking at trying to use a Magnetospeed sensor, but had difficulties seeing the signal on my o'scope while also getting a reading. I've always wanted to include...
I have had fun developing a Chronograph for measuring bullet speed with a Teensy 4.0 with 3.2in tft and RFM69 radio link to a Feather M0 with the 433mhz onboard radio.
Also added a Nano printer to the wireless display for a hardcopy at the...