Voltage Control: 20v DC

I am trying to find an electronic part that will take in anywhere between 12-36v and put out a consistent 20v. What could do this? And how can I get one? If amperage matters, I'll probably be putting between 1 and 4 amps through it.

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tech-king9 years ago
3.5 amps? sounds like a zener diode might work.
is that your answer to all electronic regulating questions? I havn't seen you here for a while Glad to have you back Also that won't work when it's below 20 volts
hmmm..... yes, i suppose a zener diode is my answere to regulating questions. and i dont think an lm317 can add voltage.
V-Man737 (author)  tech-king9 years ago
I was thinking a 78xx would work, but I don't know which... Or exactly how to get one (or ten, lol).
I don't know if it exists, but you'd need a 7820. Also those are only like 50% efficient, so half of your battery will go to waste I look into it tommorow, but it's late here
V-Man737 (author)  guyfrom7up9 years ago
It exists! It is cheap! I have made a tiny purchase on eBay to see if it works. Thanks a ton!
you may need heatsinks for prolonged use....
guyfrom7up9 years ago
you could use 2 or 3 (preferably 3 or 4) lm317 regulators in parallel (cause each one can only handle 1.5 amps max) google lm317, radioshack carries them, they are pretty simple to use, you just need 2 resistors to determine the output voltage. If I were you I'd heatsink them.
woops, my bad, that'd only work if the voltage is above like 22 volts, I'll get back to you on this
actually, I don't know if there's a practical solution at that voltage and amperage what's the application, maybe there's a work around
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