Hi, I try to make sport timekeeping for "agility" on the principle of the IR transmitter and receiver on one side and reflectors on the other. I have try more variations, but without success. 1st option #include <IRremote.h> IRsend irsend; void setup () { } void loop () { int = 38 kHz; // 38…

IR transmitter and reciever with reflector up to 2m

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