Step 1: Tools
-needle nose pliars
-solder & soldering iron
-drill & bits
-dremmel tool(depending on your case)
Step 2: Matierials
-an led(with mounting hardware)
-a 12v sealed lead acid battery
-a transformer and a charge board for the battery
-a chassis mount connector
-1-5 amp fuse
Step 3: The Battery
things to conciter:
1)Battery size & weight
thease factors can dictate the size of your case and portability.
you need to know the power consumption of the device you are planning on using.
your ipod requires 200ma to charge.
batteries capacity is allways marked on the side, a 1 amp hour battery can safely supply 1 amp for one hour, or it could supply 200 milliamps for 5 hours.
Step 4: The Features
Please note, the first pic is a suggestion on how to lay out the controlls.(how mine is layed out)
Step 5: The Main Circuit
Step 6: Chose Your Add Ons
for the battery tester, goto step 7, for the regulator goto step 8 for usb goto step 9
Step 7: Battery Tester
if you want the three led version,connect pin 9 to positive and only connect the green led to pin 10, the yellow to pin 14 and the red to pin 1
Step 8: Regulator Board
7805 is 5v
7806 is 6v
Step 9: Usb Port(for Chargeing)
Step 10: Case Mods
note, the 2nd and 3rd immages are for an older version of the power supply, this one did not include the charge regulator or the rotery switch.