[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 it to open automatically. After searching the web for such a project and trying ...

In a bout of frustration I recently realized that the roads have all updated — most people have no idea how — and this sometimes hurts the flow of traffic. This realization happened when an ...

The detector comes in both single and dual-loop versions with separate outputs for each loop. Single-loop versions have two outputs, one pulse and the other presence. Outputs in the dual-loop system ...