DIY Dual Adjustable benchtop PowerSupply! NEW PIX/VID 02/25

Triton · **Posted:** Sun Feb 22, 2009 9:00 pm

OK so its not 100% done yet, still have some soldering and cleaning up to do on it but its Cosmetically done!

Features:
*0-12V infinitely adjustable and up to 3 Amps per side!
*Dual LED volt meters accurate to 3 decimals!
*Dual banana jack binding post terminals
*a big metal toggle switch and a light! :lol:

*is made out of a nutone doorbell or intercom box

future features might be negative voltage outputs (just add a switch and some stuff) and higher voltage output than 12v

pics!

i will post more pictures when i get it all powered up and whatnot!

By triton
VIDEO RIGHT HERE YA'LL

gamemasterAS · **Posted:** Sun Feb 22, 2009 9:03 pm

Cool I have always wanted to make one.

XCVG · **Posted:** Sun Feb 22, 2009 9:15 pm

How does the variable converter work? Variac? Dimmer? Custom logic? Pot and regulator?

Rekarp · **Posted:** Sun Feb 22, 2009 9:18 pm

slick man. Beats the crap out of my power supply :mrgreen:

Triton · **Posted:** Sun Feb 22, 2009 9:26 pm

Quote:

How does the variable converter work? Variac? Dimmer? Custom logic? Pot and regulator?

Its an LM350T variable output voltage regulator and output is set by a 5k pot

grossaffe · **Posted:** Sun Feb 22, 2009 10:01 pm

so are these used for testing and what-not before you mess with batteries?

Kurt_ · **Posted:** Sun Feb 22, 2009 10:30 pm

Niiiice. A cheap alternative is an old computer's CPU. Right off the bat, you have +3.3, +/- 5, and +/- 12 volts. In fact, I have an small old one I was saving just for that purpose...

:!:

nevermind1534 · **Posted:** Sun Feb 22, 2009 10:33 pm

Kurt_ wrote:

Niiiice. A cheap alternative is an old computer's CPU.

err PSU. I can link you to a good guide if anybody wants.

XCVG · **Posted:** Sun Feb 22, 2009 10:50 pm

Kurt_ wrote:

Niiiice. A cheap alternative is an old computer's CPU. Right off the bat, you have +3.3, +/- 5, and +/- 12 volts.

so I can take this old pentium i got and pulg it into the wall? how i need help and pin-thingy u guys tak about NEED HELP!!!!!!1!1!!!11

Sorry about that. You should fix that mistake.

nevermind1534 · **Posted:** Sun Feb 22, 2009 10:53 pm

XCVG wrote:

Kurt_ wrote:

Niiiice. A cheap alternative is an old computer's CPU. Right off the bat, you have +3.3, +/- 5, and +/- 12 volts.

so I can take this old pentium i got and pulg it into the wall? how i need help and pin-thingy u guys tak about NEED HELP!!!!!!1!1!!!11

Sorry about that. You should fix that mistake.

Here you go http://www.thebestcasescenario.com/foru ... hp?t=16382

Triton · **Posted:** Mon Feb 23, 2009 3:48 am

Its based on an AT PSU actually. i have it set up like this so i have infinite adjustability from 0-12v so i can test dropout voltages and current draws and such easier. plus it allows me to run pretty much anything that will run on 12v or less. or i can use and old printer power brick and go from 24v and down! and up to 6 amps if i run the supplies in parallel

eurddrue · **Posted:** Mon Feb 23, 2009 5:32 pm

I already have one! It is my friend's old one thats crappier, but it puts out 2A constant and adjustable from 0V to 15V

the banana plugs in mine are always plugged in too! But you have to use a multimeter to check the voltage...

Triton · **Posted:** Mon Feb 23, 2009 5:40 pm

The led volt meters i got only cost about 5-6$ plus shipping each from sure electronics in hongkong

XCVG · **Posted:** Mon Feb 23, 2009 7:57 pm

Triton wrote:

The led volt meters i got only cost about 5-6$ plus shipping each from sure electronics in hongkong

Link?!

Triton · **Posted:** Mon Feb 23, 2009 9:15 pm

CLICK HERE FOR LINK

DIY Dual Adjustable benchtop PowerSupply! NEW PIX/VID 02/25

Who is online