Introduction: Emergency Power Bank

About: Maker, Electronics enthusiast. Studied B.tech Electronics and Communication Engineering. Studies M.tech Robotics And Intelligent systems.

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.

Step 1: Collect the Things That Needed.

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.

Step 2: Make the Circuit.

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.

Step 3: Solder the Components

Solder the components carefully on the board.

Step 4: Final Finishing Work...!

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

Step 5: Its Ready....!

Now the 5V USB emergency power bank is ready.

Have fun :)

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