I needed a simple LED indicator showing that a particular voltage level had been reached—specifically, that a capacitor had charged to a particular potential. I was convinced that there must be a way ...

The TL431 and TL432 are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be ...

Off-line applications that don't require isolation can take advantage of the circuit shown in Figure 1. It offers a very simple and inexpensive solution for supplying a regulated low-power dc output..