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Re: Too hot 7805



Powering a 7805 from 12V causes a lot of energy to be dissipated in the 7805.
You may want to use a 10 ohm 10 watt resistor between 12V and of the 7805 to drop
the voltage a bit.

Bill


>
> > I'm running a 7805, to supply 5v to a 2732, and 2 74LC 161s,
> > all the load is
> > a LED with a 1K inline resistor.
> >    The 7805 is really hot after just seconds, I've checked my wiring a
> > jillion times, ans still that way.
> >   Can this 3 chips be drawing that much current?.
> > Grumpy

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