[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 ...

Spoiler summary: The sheet inductance of a square cavity is 32pH per mil of dielectric spacing. Remember: before you start using rules of thumb, be sure to read the Rule of Thumb #0: Use rules of ...

At low frequency, a transmission line, shorted at the far end, looks like an inductor. After all, it is just a conductor in a funny shaped loop, current going down the signal path and getting shorted ...

Inductive loop systems are commonly used thanks to their simplistic nature. There’s much less chance of a breakdown compared to expensive and complex digital sensors, but this simplicity can also be a ...

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 ...