Free circuit schematics - wiparat.com

This circuit is very useful in beginners circuits, since most will work on 5v, which is the voltage of this easy little circuit.
This circuit is just an implementation of the 7805 integrated voltage regulator. What this little component does is to lower a voltage and stabilize it by reducing noise and ripple, in order for [...]

Today I receives electricity old printer from a friend. I think it can’t is usable , but power supply circuit still can be usable , modify be power supply source in electronics all work. I then build to is DC Power Supply 9 Volt Regulator, that can give current get about 1 Amp arrive at [...]