Don't you just hate it when you're taking photos with your camera then your battery just dies on you and there isn't anywhere to charge your camera! Well I have come up with a solution! It's to build a Portable USB Power Supply and I will show you how you build one in this Instructable. Here are the specs for Portable USB Power supply
length=5.6cm height=3.1cm
output=5vdc 1A
battery life=over 3 hours

Step 1: Gather Materials

Here is a list of things you need to build the Portable USB Power Supply
1-battery connector
1-100uf capacitor
1-5v voltage regulator
1-rectifying Diode
1-220uf capacitor
1-150ohm resistor
1-330ohm resistor
1-10kohm resistor
1-female usb port
1-pcb board
1-9v battery
1-project box

soldering iron
philip screw driver
16/64" drill bit
hot glue gun
can it work with a 200mAh 9volt battery (rechargeable)
i did the circuit today and i have 4.38V in my output if i remove the diode i have 5! what you suggest? is 4,38 enough to churge the iPod?....i dont have any other device to charge so please tell me....i tried on my ipod and nothing happened!!!...please reply i am too dissapointed!
hi wat is the no. on the rectifying diode??
I think it just needs to be a low voltage silicon diode which can handle the current.<br> A 1N4001 should be fine.
Nice 'ible I think you should add some picture notes though. d:)
Two questions for you: First, why put the resistor across the data pins on the female usb port? Wouldn't it be safer to just leave them unconnected? (Asked out of ignorance, not because I think I know better.) Second, how long does the battery on this last? How many charges can you get from one 9V battery? I know it's going to depend on the device in question, but I'm curious if I would get one full charge from this, or half a charge, or what.
I put the resistor across the data pins on the female usb port because I that in another instructable. It won't hurt to do that because power is supplyed only when the device is pluged into a computer. I don't know how long the bnattery will last because It hasn't died yet but I'm guessing it should compleatly charge over 2 devices.
Isn't the resistor for charging the Apple related products?
You need <a href="http://www.instructables.com/image/F17V2NCFKHQCSHJ/Schematics.jpg">this</a> to charge any new apple products. The resistor between the data pins makes the ipod say that it is charging but it really isn&rsquo;t.<br> <br>
That's interesting. I have an 1st Generation iPod Nano. When I would plug it into USB to charge it, it would recognize the iPod, and reshuffle my songs. Annoyed me to no end. So I went to the dollar store and got a USB extension cable. I cut it down to about 6 inches, and only connected the red and black wires. Left the data wires alone, not connected to anything. I plug that into the USB port, then the iPod's cable into that. Always works just fine, with no 100K resistor.
That makes sense because not all Apple products need the resistor.
OOPS! 10K resistor.
If you used a 300 milliamp 9 volt battery than you are not getting a 1 amp output.
The reason my Portable USB Power Supply can output 1 amp is because the voltage regulator I used is rated for 5volts at 1amp. Battery are measured in milliamp hour meaning that if the devise you are powering consumes 300milliamp the battery will last for 1 hour.
Yes, but if you try to pull 1 amp out of a 300 milliamp battery you do risk it overheating. It will only put out 1 amp if the load requires 1 amp. When the voltage regulator says it is 1 amp it means that its maximum load is 1 amp.
i have a soldering iron just like that, mine is 20-40 watts
Cool, I used to have a mastercraft 25watt but it stoped working so I got that one instead.
i had a 30watt before this and it didnt work very well so i got this 1 and accidentaly destroyed the other 1
does this really charge an IPod touch? ive been looking online for making a portable charger for my ipod touch. i made one, worked for half an hour, then the ipod said it was not supported. does this legit charge it though? thank you. awsome instructable btw

About This Instructable


40 favorites

More by qazwsx755: Arduino Examples #2 Use an Arduino as a FTDI Programmer Arduino Examples #1 Make An RGB Led Randomly Flash Different Colors How To Build a simple 1-25 VDC, SPST NO, 0.05A 1-70 VDC  Relay For Under $4
Add instructable to: