https://forum.arduino.cc/t/3-qrd1114-button-arduino-mini-breadboard-help/172219
3 QRD1114+Button+Arduino+Mini Breadboard+HELP! - General Guidance - Arduino Forum
Jul 8, 2013 - Hello tinkerers :slight_smile: I'm working on a project that surpasses my knowledge of electronics, and I need your help! I connected 1 QRD1114 IR emitted /...
general guidancebuttonarduinominibreadboard