https://forum.arduino.cc/t/photo-transistor-vs-ldr/39340
photo transistor vs LDR - Interfacing - Arduino Forum
Dec 22, 2009 - hi guys i am about to build a project it is a chronograph for rifles the way i want it to work is to use either a LED or IR LED and a reciever the light is...
photo transistorvsldrinterfacingarduino