Traffic lights are timed using a few different methods, with many using inductive loop systems embedded in the road in order to function properly. Induction loops are basically magnetic sensors ...

For anyone unfamiliar with the original project, the circuit detected a vehicle via an inductive loop and was able to perform a task like opening a gate. It now has two independent channels which ...

Such a situation faced [David Schneider] at his Quaker meetinghouse, which he ended up solving with this home-brew audio induction loop system. The worship style of conservative sects of the ...