Picture of Super Simple Ipod Battery Charger (Altoids Tin)
Super Basic 5v regulator circuit

Step 1: Get the Goods

Picture of Get the Goods
You will need:
1. A 9v or greater battery
2. A 9v battery clip
3. A lm7805 or lp2954 5v regulator (Sampled from Maxim-Dallas)
4. A female Usb port (also sampled but from keyeleco.com)
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joshr1232 years ago
THIS WON'T WORK you need to put around 2volts threw both data pins
inthesand6 years ago
I made a charger with AA rechargeable batteries and it works for a little while, but then the Ipod says its done charging when its not yet full. I'm thinkin maybe cause the AA's are not enough power. I say that cause regular AA's are 1.5 V but these rechargeables are 1.2Vs, ( I just remembered the difference). Any ideas as to why the Ipod stops charging after that little bit?
Can i use the LM75A Regulator instead of the LM 7805? if not, can someone please post a link where i can get a sample LM7805. ty
If i am not wrong its the same thing
i pulled one from an hp scanner
I don't know exactly why it does it, but I would guess it may have something to do with the current, not the voltage. I tried charging my 1st gen iPod Touch (w00t) on a mintyboost and it didi the same thing.
Yeah, what should I do if the charger icon doesn't appear on my ipod, but the charger is clearly on?
it wont work on iPods, their cables have something special about them
Its not the cable its the USB
Yeah i know that now. All the storebrand chargers have resistors in them to tell the ipod to start charging.
just connect d+ to d- (pin2 to pin3) and newer ipods will think it is a charger
you sure that it will work because im gonna buy the material :D
it doesn't work with new ipod models.
go to this website for the one that works with new ipod models and iphones 

I don't think, it's good idea to use a 9V battery, cause they only have a capacity of approx. 250mAh, so in my calculation, the battery will only last under an hour.
heyyyyyy!!!!!you copied my character!!!!!
wow wait a second thats my character
Maybe you copied mine, cause I've been on 'ibles for longer time than you :o :o :o
maybe we both copied from google!!
Yes. I think you're right.
i changed my image...Wall-E is too childish..
stallsworth7 years ago
why dose it heat up so much
because it feels like it
Alot of digital things you take apart have 5v regulators in them(I found one in a dish receiver) and some of them have little screw on or awesome clip on heat sinks.
i found one in a temperature thermometer for measuring the room temperature (I bought it for 1 dollar)
zack247 joinaqd5 years ago
if you live in canada, i bet i know where you got it.
the common issue with linear regulators is the heat, it is commonly used to supply necessary voltage for PC components who needs very little current (<=100ma). Heat indicates severe efficiency loss, sure its simple but those 9Vs will cost alot more on the long run.

input voltage = 9, output voltage = 5, say your drawing 500ma, a full load for any USB port, then your looking at (9-5)x0.5 = 2 watts of heat. the LM7805 by itself will cook itself to ~120C before internals shutdown

without a heatsink you will start to smell the solder smoke pretty fast.
Last time I tried something like this I thermally epoxied the LM7805 to a 3 watt capable heatsink, tied the input pin to a 12V source, the output pin to a 5V 40mm fan mounted to the heatsink and made myself a little space heater _

if the heat gets to you, an alternative option would be a zener diode of some sort...something like 1N4732A with ~193mA sustained current. Zeners diodes are cheap you could place several in parallel to share the overflow current once whatever your charging are up to ~5volts.... I'm sure theres an instructable for that here somewhere
tyeo098 (author)  stallsworth7 years ago
Because thats how the 7805 gets rid of the excess heat.
markee24 years ago
The schematic is very simple. i have also another version of simple
iPod charger using transistor 

from http://electronician.blogspot.com/2010/11/simple-ipod-charger-using-6v-to-9v.html 

simple cellphone charger.jpg
toogers5 years ago
the battery would last longer when idling if you put a switch to cut all power to the regulator, electrons still flow through when not charging.
lorddavis65 years ago
you need voltage regulator ( L78M05CV )
LiporXT6 years ago
also I have constructed a 9v portable usb charger, beautiful project I compliment
Composizione 1.pngEnjoy.png
zack247 LiporXT5 years ago
now that, is smooth. it looks just like a regular 9v battery clip. ingenious. brilliant. smart
Bartboy LiporXT6 years ago
does not work cant someone post one that really WORKS
tyeo098 (author)  willymakesstuff6 years ago
It works if youre not a 3rd garder, cmon people this is the simpliest circuitry. If you read the comments, it DOES NOT work for IPT and iPhone, because they require a signal on D+-, thats how they get you to buy apple accessories.
http://www.instructables.com/id/SBM25G0FR123LQF/   I did this one, same thing just added 2 wires and resistors, works like a charm!
Dgunz56 tyeo0986 years ago
sooo this doesnt work for ipt? and if not how do u make it work? bigger battery?
ooooooo sorry i was using this for itouch and iphone
it works i just made it today
I think you can charge an iPhone/ itouch if you bridge the data lines with a 10k resistor
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