We’re quite sure that all hobbyists have used the 7805 voltage ... picture above such a regulator is composed of very different elements: transistors, resistors, capacitors and diodes, all ...

If you need, say, a 5V regulator, you grab a 7805, add a capacitor for stability, and send in enough voltage for the regulator to work with. Cheap and easy. However, the part is not without its ...