Super Simple Ipod Battery Charger (Altoids Tin)

Super Basic 5v regulator circuit

Step 1: 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)

Comments

[inthesand]

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?

[mr.break_it]

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

[chua_erei]

If i am not wrong its the same thing

[zack247]

i pulled one from an hp scanner

[Radioactive_Legos]

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.

[Artificial Intelligence]

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.

[joinaqd]

heyyyyyy!!!!!you copied my character!!!!!

[dudemanclc]

wow wait a second thats my character

[Artificial Intelligence]

Maybe you copied mine, cause I've been on 'ibles for longer time than you :o :o :o

[joinaqd]

maybe we both copied from google!!

[Artificial Intelligence]

Yes. I think you're right.

[joinaqd]

i changed my image...Wall-E is too childish..

[stallsworth]

why dose it heat up so much

[dudemanclc]

because it feels like it

[geeklord]

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.

[joinaqd]

i found one in a temperature thermometer for measuring the room temperature (I bought it for 1 dollar)

[zack247]

if you live in canada, i bet i know where you got it.

[flashlight_nut3777]

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]

Because thats how the 7805 gets rid of the excess heat.

[markee2]

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 

[toogers]

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.

[lorddavis6]

you need voltage regulator ( L78M05CV )

[zodthekonquerer]

Yeah, what should I do if the charger icon doesn't appear on my ipod, but the charger is clearly on?

[FRABBAfrabbaFRABBA]

it doesn't work with new ipod models.
go to this website for the one that works with new ipod models and iphones 
www.tzywen.com/modules.php?name=News&file=article&sid=683
enjoy

[zack247]

it wont work on iPods, their cables have something special about them

[chua_erei]

Its not the cable its the USB

[zodthekonquerer]

Yeah i know that now. All the storebrand chargers have resistors in them to tell the ipod to start charging.

[max1zzz]

just connect d+ to d- (pin2 to pin3) and newer ipods will think it is a charger

[tobyscool]

you sure that it will work because im gonna buy the material :D

[LiporXT]

also I have constructed a 9v portable usb charger, beautiful project I compliment

[zack247]

now that, is smooth. it looks just like a regular 9v battery clip. ingenious. brilliant. smart

[Bartboy]

Awesome!

[willymakesstuff]

does not work cant someone post one that really WORKS

[laxchamp1111]

it works i just made it today

[tyeo098]

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.

[snelpiller]

http://www.instructables.com/id/SBM25G0FR123LQF/   I did this one, same thing just added 2 wires and resistors, works like a charm!

[Dgunz56]

sooo this doesnt work for ipt? and if not how do u make it work? bigger battery?

[willymakesstuff]

ooooooo sorry i was using this for itouch and iphone

[Pyromaster951]

I think you can charge an iPhone/ itouch if you bridge the data lines with a 10k resistor

[Zem]

So, (Correct me if I'm wrong.) it looks like the negative from the battery, the ground pin, and pin #4 from the USB all connect, correct?