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

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

Post by Triton » 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!
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i will post more pictures when i get it all powered up and whatnot!

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By triton
VIDEO RIGHT HERE YA'LL

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by gamemasterAS » Sun Feb 22, 2009 9:03 pm

Cool I have always wanted to make one.
.

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by XCVG » Sun Feb 22, 2009 9:15 pm

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

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by Rekarp » Sun Feb 22, 2009 9:18 pm

slick man. Beats the crap out of my power supply :mrgreen:
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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by Triton » Sun Feb 22, 2009 9:26 pm

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 :D

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by grossaffe » Sun Feb 22, 2009 10:01 pm

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

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by Kurt_ » 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...

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Hey, sup?

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by nevermind1534 » 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.
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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by XCVG » 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.

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by nevermind1534 » 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
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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by Triton » 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

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by eurddrue » 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...
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chainfire95 wrote:220V I believe
I think we should check to see if you can withstand 220 volts

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by Triton » 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 :D

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by XCVG » 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 :D
Link?!

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Re: DIY Dual Adjustable benchtop PowerSupply!

Post by Triton » Mon Feb 23, 2009 9:15 pm


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