When a current is supplied to the coil of wire, the relay closes, allowing current to pass. In reality a transistor is generally added to the circuit to provide enough power to control the relay ...

If you ever work with a circuit that controls a decent amount of current, you will often encounter a FET – a Field-Effect Transistor. Whether you want to control a couple of powerful LEDs ...

As with many inventions, two people had the idea for an integrated circuit at almost the same time. Transistors had become commonplace in everything from radios to phones to computers, and now ...