Electronic enthusiasts looking for a way to control power to the next project from a 9 V battery may be interested in a small device called snapVCC. Available to purchase from the Crowd Supply website ...

There is little to be said about this circuit. All the work is done by the regulator. The 7809 can deliver up to 2 amps continuous output whilst maintaining a low noise and very well regulated supply.

Here is an ideal Power Supply Unit for trouble shooting the circuit boards. It gives Five and Nine volt regulated DC from a Rechargeable battery. It is portable and handy and can also functions as a ...