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Topic: 12v input to 7805 voltage regulator heating in a second?? (Read 309 times) previous topic - next topic


Incorrectly wiring a 7805 will make it get very hot very quickly if it is supplied from a strong power source. Check your wiring, Two leads are probably reversed.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)


The 78XX series actually work by dissipating the extra power into heat to create the output voltage. Therefore the efficiency of those things are the worst ever, just second to a 100W light bulb.

Can you get your hands on a "real" DC-DC converter? Efficiency and output are much better on those and you don't have to worry they get hot, so you don't need a giant heat sink to keep things cool.
World Domination?

Yes please, i'll take 3 right now!

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