modified 11 years ago

Hey faceblast

00:52:15

Is this the right way to make an adjustable 12-24v power supply? Using a potentiometer?

published 11 years ago

aquialexjajaja

11 years ago

You should use a transistor because this way when you puto a load the voltaje will variate

romanbirman

11 years ago

Pnp or npn?

giomix

11 years ago

NPN

faceblast

11 years ago

the pot in this circuit is a powerful heater and wastes a lot of power. use an LM317 to make an adjustable voltage supply

romanbirman

11 years ago

Thanks guys

faceblast

11 years ago

if you're after a lot of efficiency you can also get tiny switch mode converters now, they're tiny little power supplies eg. http://au.element14.com/webapp/wcs/stores/servlet/Search?catalogId=15001&langId=43&storeId=10184&categoryId=800000000443&sort=P_PRICE&pageSize=25&beginIndex=1&showResults=true

romanbirman

11 years ago

And it seems to me as though theyve made those so cheap that its not even worth making your own. Im just trying to learn electronics, not really knowing where to start i chose power supplies. Hoping for alot of support from the real enthusiasts such as yourself. Thanks again

romanbirman

11 years ago

Correct me, however, if i am wrong...

Sine_eyed

11 years ago

Power supplies are a logical place to start- as far as I know, all electronic devices use 'em. But they range from simple to uber complicated. Even the easier ones that one could learn to build have fundamental component relationships that any enthusiast would do well to learn and understand. All depends on how far ya wanna take it. Keep at it- it's fun..

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