A regulated power supply can fail in a mode that results in excessively high output voltage. An overvoltage protection circuit, a crowbar, is available as an option for most power supplies.

Click to Enlarge Image Figure 1: This one-op-amp circuit derives a regulated plus-and-minus supplies from unregulated plus-and-minus input voltages. (Note: OP1 is a Maxim MAX4495 device.) The op amp ...

The board is small and simple, but quite useful all the same. It was built to power both sides of the breadboard, and it can be easily switched between an unregulated power supply and a regulated ...

Fig 1. The ripple-eater design, essentially a filter with a follower, rejects as much as 40 dB in ripple and continues operating even as the supply voltage drops to low levels.

Electronic equipment requiring dc power must adjust the ac input to a usable level with transformers or switching transistors and use a rectifier stage to convert the ac to dc. Electronic ...