Emergency Power Bank

Hi friends, in this instructable i am gonna share you how i made this simple emergency power bank.

This is a quick and simple diy and also cheap.

A few things are needed.

1. Take a dead 9 V battery, break it down and take the connector clip alone.

2. A small piece of copper clad board.

3. 7805 voltage regulator (SMD).

4. USB female port.

The circuit is really simple one with 7805 regulator IC.

Using the circuit diagram ,7805 and USB port ,draw a layout diagram on a piece of copper clad board.

Then do the chemical etching process using ferric chloride.

Solder the components carefully on the board.

• Connect +ve and -ve wires from the pcb to the connecting clip of 9 V battery.
• Now fix them together using hot glue.

Now the 5V USB emergency power bank is ready.

Have fun :)