Mailbag is back! Forum HERE SPOILERS: Beginner schematic and PCB layout analysis. Can Dave guess the mystery PCB’s function? Arduino Inventors Guide Book Radiosonde car tracking Psion II PDA BK Precision Binding Post Adaptor The Choculator MPEG4 USB TV/DAB dongle teardown Forrest Mimms Circuit Classics Amp Hour Interview https://www.instagram.com/faz_weekendprojects/