Re: 12V regulator

Rich Grise wrote:
On Mon, 20 Oct 2008 01:59:51 -0400, Paul E. Schoen wrote:

"Steve" <s@xxx> wrote in message

...

led switch, but it's proving a bit more difficult than I wanted for
this particular application. Thanks for the replies,
Steve

You should be able to use about a 10k resistor (about 1-2 watt), and a 1N4004 or higher rated diode, in series with the LED.


It's not necessary to put a diode in series - the LED is alreaady a diode.
But it _is_ necessary to put a diode in antiparallel with the LED so its
reverse voltage stays belos its limit.

But if he does use a proper (say for example a 1N4004)
in series, are you saying he still needs an antiparallel
diode?



But the OP has already said that he doesn't have access to the resistor/
LED junction, so he's just going to spring for the neon switch.

My view is one is always better off using a listed UL product
in branch circuit wiring. Modifying stuff and installing it
in permanent wiring is not allowed by the electrical code,
and can result in safety issues - probably does in many cases.
If it is a cord and plug connected device, that's a different
story. It may still be unsafe, but the code does not require
that you use only commercially produced, UL listed devices
to my knowlege.

Ed


Cheers!
Rich

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