Circuit diagrams and schematics - Electronic projects

This is the schematic of the 30V/2A power supply I use in my own lab.It may look very complex, but it really isn’t very difficult to understand: it uses only the knowledge we’ve learned in the previous lessons. The top part looks like the power supply we built in Lesson 7: the transformer L1 transforms [...]

It is a simple circuit regulated power supply, based on the known UA723, that drive a transistor Q1 [2N3055]. The regulation of voltage, of expense becomes with potentiometer R1 from 0v-30v DC roughly. In order to we achieve 30 V, will should the transformer of supply TR1, it gives all the current that it asks [...]

This is power amplifier OTL circuit,It is old but good amp(classic) I like it. It is have power output 60W at 8ohm speaker. I use IC op-amp LM3900 is mian part in this circuit. The LM3900 function amp audio signal,ad have transistor 2N3055 x3 for boost power sound audio. The voltage power used 70V at [...]