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Voltage regulation Answered

I have a solar charge controller (Velleman SOL4UCN2) that outputs 12v, 6v and 3v. But I need 9v and I'm not sure how to get that.

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pless84 (author)2008-09-01

Yes it's simultaneous outputs, so I gues the 7809 is the way to go. Thanks for the help :)

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Sandisk1duo (author)2008-09-01

So basically build this then tune it to put out 9v (use a miltimeter

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NachoMahma (author)2008-09-01

Use the 12V and 3V outputs (3V will be the negative) - that will give you 9V. May cause a problem if the negative side of your load is grounded.

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guyfrom7up (author)NachoMahma2008-09-01

that's what I was thinking, but I thought it only gave out 1 output at a time

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NachoMahma (author)guyfrom7up2008-09-01

. He used "and," not "or," so I'm assuming they are simultaneous. If you're right, then the 7809 (or similar) would probably be the way to go.

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guyfrom7up (author)2008-09-01

how efficient does it have to be? You can just use a 7809 with the 12 volt output

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