V1 of LC+Resonance Frequency Meter for ESP32
I've searched for a while for ESP32 based LC ( Induction / Capacitance ) meter but seems like everyone were arduino based. So.. I've created one which actually looks better than the rest ;) It's based on LM393N but You could replace it with similar. In the github - you can get the full EAGLE PCB single layer optimized board and the circuit with a few libraries which I've created as well, and the demo project. ENJOY ! :) ...
*** NOTE that as better the quality and smaller is the tolerance of the capacitor - the better readings you will get. *** It is used 10 nF 10% capacitor. If You have other one, or you need to measure higher or lower inductances - change the capacitor, and reflect it's changes inside the code.