Simple 5v PSU (battery Powered)

Introduction: Simple 5v PSU (battery Powered)


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

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

Soldering Iron

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.

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)

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    11 years ago on Introduction

    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. ;)


    Reply 12 years ago on Introduction

    supply it with 9v, and it will put out 5v, which is useful for testing and/or powering/charging USB devices