The Sep/Oct 2025 issue of Elektor is out. The magazine explores a range of topics including short-range audio, satellite ...

Usage Upload the transmitter_vehicle_detector.ino code to one Arduino UNO board. Upload the receiver_traffic_signal_output.ino code to the other Arduino UNO board. Power on both Arduino boards.

This product is open source! Various bits of the code have different licenses applied. Anything SparkFun wrote is beerware; if you see me (or any other SparkFun employee) at the local, and you've ...