This simple instructable will show you how to make a wall charger that can charge / operate any USB device, including iPhones and iPods.
Most DIY chargers can not charge iPods and iPhones. This one can, however!
This charger takes input from both a 9v battery and a size N DC Coaxial plug.
A wall charger or car charger with the right voltage and amperage can be modified to have a size N DC Coax plug with a cable coming out of it.
Most of the pictures of the charger itself are on the last page (Step 7).
Step 1: Materials
5V regulator and SMALL Heatsink: I used Radio Shack part: http://www.radioshack.com/search/index.jsp?kwCatId=&kw=5v%20regulator&origkw=5V%20regulator&sr=1
Resistors: 22 Kohm (1), 27 Kohm (2), 39 Kohm (1).
I used Radio Shack part: http://www.radioshack.com/product/index.jsp?productId=2062306#
DPDT Toggle Switch: This will be used to switch between the battery and the DC Coax Jack.
USB Extension Cable: Any cable with a type A Female USB port will work.
AC / DC Wall Transformer: Try to get one with <10 volts and equal to or less than 1.5 amps. The regulator will overheat and / or blow if you put more than 1.5 amps into it.
Cigarette Lighter Car Adapter: 12V dc
Size N DC Power Plug (2): With wires attatched.
Size N DC Power Jack (1): Panel Mount with solder leads.
Prototyping Board: I used Radio Shack Part: http://www.radioshack.com/product/index.jsp?productId=2104052
Project Box: Whatever kind you need to fit the components inside
Wire: I used a mix of 22 gauge solid and stranded wire.
Heat Shrink Tubing: An assortment of sizes would help.
9V battery and 9V Battery Clip
Cable Stress Relief Joint That Fits The USB Cable: I cannot stress (No pun intended) how important this is. If this fails then the USB cable solder joints can be damaged
Soldering Iron with Solder
Third Hand (Optional, but would be very useful)