Simple Mobile Charger

Ever needed your mobile to catch a pic or share something on Facebook, just then your battery runs out. At this moment all you need is an external battery charger. Recently I was checking out of the ones on eBay (see pic) for portable or external mobile chargers and just realized I could make that, and started to build one. At the end I realized it wast so hard and it cost me around 10$ while the orginals were around 30$. And also looks quite like the one on ebay as in the pic.

In this tutorial Im going to show you how to build a simple portable mobile charger. This has a USB output so you can you can plug in various types of mobile phones. So you can stop searching for a charger and start sharing. More ever this is portable and can fit in ur pocket easily . This charger gives a constant output of 5v at 1amp.

1) LM7805
2)USB input pin
3)Rechargeable 9V battery
4)A case to get all of this in.
5)A switch
6)Power input pin (see the pic)

The circuit is quite simple and takes a matter of minutes to build. The circuit is just a voltage regulator, it is a 5v regulator which gives 5v output from the rechargeable 9v battery. I inserted a switch to keep the circuit off when not in use and get a longer charging life.
Insert the switch in between the input DC positive. The other pin of the switch goes to the charger .
This gives us three modes of operation one internal battery charging , off and then an USB charger.

For the battery I used old rechargeable mobile phone batteries which are rechargeable. I used two batteries connect in series which gave me 9V output. You can go with easy ways by using 9V rechargeable battery which comes with a charger. And for the case you could go with an altoids container . To save space You could remove the capacitor , but if your mobile keeps on beeping then add it.