This gadget can sniff out voltage and amperage of electrical circuits ... at these two diagrams below. The first is an outline of what you should see. It's the simple three-way circuit I ...

We can see how circuits work, and represent them with some simple diagrams ... in parallel reduces electrical resistance. Learn more about parallel circuits. A three-lane motorway represents ...

To achieve this higher level of electrical wizardry, you install four-way switches between the two three-way switches in the circuit. A four-way switch has four screws on it, plus the green ...