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Hello,

this is my first instructable a longgg timmeee, and in that time, I have learned much, such as soldering is a good thing, melting plastic is a bad thing and that using the correct components mounted on a board is a good thing.

But less of that and on with the instructable.

Step 1: Components

Components--
9v Battery Clip OR DC Jack
9v Battery OR ~9v AC-DC transformer
10uf capacitor
0.1uf capacitor (or 100n capacitor)
L7805CV 5v regulator (..or pretty much any other 5v regulator)
assortment of wire
a heatsink for the regulator (optional)
old piece of board

Tools--
Soldering Iron
Solder
Pliers

Step 2: The Schematic

This is what you should build it from.

Step 3: Test It!

Grab your multimeter and hook the positive up to the positive, and the negative to the ground. Don't forget to set it to VDC at the correct range.

Uses--
I tend to use this for testing and because I had this regulator lying around, but you could hook up a female usb connection to charge up your phone or something (won't work with iPhones or iPod touches without a little modification)
Nice intractable! I would recommend putting a higher value cap on the input, and another cap on the output, also with a higher value. This is because the regulator itself will out out some ripple, and that can become a large thing for heavy loads. just a suggestion. ;)
what does it do?
supply it with 9v, and it will put out 5v, which is useful for testing and/or powering/charging USB devices

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