[Trax] was asked by a friend to build a device that could detect the presence of a car in front of his garage gate for ... build his own detector based on an induction loop.

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 ...

The PD130 inductive loop detector is the most critical component of ... indicator and are suitable for parking control and motorised door or gate applications. All detectors are CE tested and approved ...