Anyony know what these things are made with. They cost $25.00 and I'd like a Dc-DC voltage regulator but for a hole lot less $$$.

The AnyVolt Mini is a miniature step up / step down 0.5A switching DC-DC converter. The output is adjustable from 1.25 to 14V.


http://www.dimensionengineering.com/...nyVoltMini.pdf
http://www.dimensionengineering.com/AnyVoltMini.htm

Any suggestions on how to build one! I'd like to be able to use a USB port to run
different devices, maybe even charge batteries...

 

It says on the main page that these devices use the SEPIC DC-DC converter topology. Just type "SEPIC Converter" into google and you'll get a good start. there is alot of information as well as schematics about it on the web.

how much current do you need? USB provides a useful amount of power but it might not be enough for your particular application.

 

What current do you require?

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the dimension engineering products are very inexpensive for what they do. look through the digikey or mouser catalogs for preassembled dc-dc converters, most start at $50 and go up from there.

if you specify your input and output voltages and current, folks might be able to suggest a better fitting product. usually boost converters (sepic or otherwise) are limited on output current due to limited input current and input current handling.

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The current necessary would be to power a 1.5 in X 1.5 in CPU fan, aprox 100mA-150mA?
$50 is far too much!