Introduction: Emergency Power Bank

Picture of 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.

Step 1: Collect the Things That Needed.

Picture of 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.

Picture of 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

Picture of Solder the Components

Solder the components carefully on the board.

Step 4: Final Finishing Work...!

Picture of 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....!

Picture of Its Ready....!

Now the 5V USB emergency power bank is ready.

Have fun :)


lapham25 (author)2017-08-06

Congats for your EPB, i will try make one with a LM7805CT, withou PCB :)

Thanks and all the best.... :)

Lima79 (author)2017-08-04

This is pretty cool.

wchen8 (author)2017-07-29

Small portable for out door and on the move use, good one.

alfredmoses (author)2017-07-20

wonderful project

golfball (author)2017-07-11

Nice simple project, however good practice for using a voltage regulator such as the 7805, is to place capacitors on both the input and output. This will increase the stability and is shown in the data sheet for this part.

I know it. But I avoided those capacitors to make it miniature.


Might you be able to stay miniature with SMD ceramic capacitors? Pretty sure the datasheet doesn't demand a big juicy electrolytic.

Wesbflyer (author)2017-07-10

Nicely done!

Thanks :)

bhavik zure (author)2017-07-10

nice project.

thanks for sharing.

Thank you...

About This Instructable



Bio: I am an electronics enthusiast, doing my B.Tech degree in Electronics and Communication Engineering.
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