Another Altoids Ipod Charger

Step 4 Wiring the ground

Solder a wire going from the out of the regulator (pin 3) and solder it to pin one of the usb port.

Take the wire you soldered onto the ground (pin 2 of the regulator) and solder it to the negative of the battery.

Ok now the confusing part. Solder another wire onto the negative of the battery. Take the end of that wire thats not connected to anything and connect it to pin 4 of the usb. Sorry if this sounds confusing

The picture should help a little.
I also tried to make a schematic in paint

Comments

[guitarcrazy189]

will this work for the ipod touch 3g?

[29er sailor]

Good idea..

Here is something that would work for the touch and iPhone!

http://www.adafruit.com/index.phpmain_page=product_info&cPath=10&products_id=14

Master T

[hhankpelfreyy]

sorry man, but from what I've heard, the newer ipod touches and iphones and even the ipad use the data lines to charge in addition to the power lines in a usb cable

[pablosartor]

actually giving less voltage to the regulator by adding the resistor in front might be beneficial so that the regulator does not heat up as much. This works if you are sending more than 5v out of the resistor otherwise it is pointless and agree with bomberman 3 on his circuit. In addition this will not charge your iphone. for the iphone to charge you will need to use pins 2,3 on the usb with a +2.7volts and -2.7 volts in addition to 5 volts on 1,4. Good Luck People : )

[guitarcrazy189]

how would you make it so that pins 2,3 are getting a +2.7 volts and a -2.7 volts?

[jmcg_ian]

how would you go about doing this for an iphone?

[protonrules]

this will work exactly the same for an iPhone, they charge in the same way.

[tomtortoise]

I made this and used it on a usb light and the led flashed then went away it is not the bulb being burnt out because i can do it again also i nave nano 3g it lights up but no charging.i tried an enV 3 it sais charger not reccomended but starts to charge.

[TarzanJr]

I forgot to put the resistor in and when i tried it the light bulb blow out so fast but it was very bright next time i am going to video tape it. It was pretty cool!

[roroanozolo127]

i did that and the led blew out so i replaced it but now it wont work

[bomberman3]

I think this would work better for the LED

[cmart20]

I did this with radioshack 9v alkaline battery, spst submini toggle switch, 150-ohm carbon-film resistor, 5mm / 1.7 / volt 20mA / 3000mcd red LED, 7805 5VDC regulator. The female usb that I'm using i got from a usb port and all the 4 metal pins inside came off but I put the pin 1 in and pin 4 back in thinking they are the only ones i need. I finished this project but its not working what did I do wrong?

[binary_man_1010]

the new ipods are different, yes pins 1 and 4 are the charger but 2 and 3 are also used to tell the ipod that it is charging.(2 is D- and 3 is D+)D=data

[bomberman3]

Are you sure you put the pins in the correct positions? Also, it may not fix your problem, but if you have a 1.7 volt 20 ma led hooked up to 9v (as shown in my schematic), you would need a 390 ohm resistor, not 150.

[cmart20]

yes i did hook the pins correctly because my ipod(3rd gen nano) will be off and when i plug it in it turns on the ipod but doesnt charge it. I was thinking it was the resistor too but i dont know much about them so i didnt know which one to get. thanks ill try it out with a 390ohm resistor.

[bomberman3]

This is a good website for calculating resistor values for your LEDs.

[Killa-X]

Exactly what I said before. When the resistor is going to the regulator, your giving it less power than 9V. Thus, like your diagram shows, its best to go a separate path. Also, Your amps question, Radioshack ones are like 1amp, 34V max for input, so I don't know..

[bomberman3]

Ya that's what I was thinking. And about the regulator, I found out that USBs give off a max of 500 mA so a 5v 500mA regulator should work best.

[psychodeathmonkey]

couldnt i just hook up the regulator/9volt jumpers to the input part of the usb cable directly into the device and completely skip the female usb part?