how to build a portable charger. Does not work with iPod touch or iPhone
-1x 150ohm resistor (optional)
-1x toggle switch (optional)
-1x LED (optional)
-1x7805 voltage regulator (required)
-1x 9v battery clips (required)
-1x female usb connector (required)
soldering iron (required)
project case (optional)
scrap wire (optional)
if you do not want to use the switch then u can just solder the positive battery lead to the left prong of the 5v regulator. If your not going to use the LED then you wont need the 150ohm resistor. You can just use the second method
cost of products(not including the solder and the soldering iron and the project case) using first method: $16.06 (after tax)
cost of products(not including the solder and the soldering iron and the project case) using second method $9.47 (after tax)
I compiled my parts into an altoids mint tin
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