Re: LED's

["Robertm" <Respond@xxxxxxxxxxxxx>]

"Rich" <Never@xxxxxxx> wrote in message
news:k4ydndNrJZY0W_LenZ2dnUVZ_tGdnZ2d@xxxxxxxxxxxxxx
>I have an assorted pack of led's.  No numbers lots of colors. How do I tell
> what resister to add in the circuit at 12 DC
>

Many LED's drop 1.2 volts across them so you have 12 minus 1.2 = 10.8 Volts.
Assuming a current of 15 ma, you might try a 720 Ohm resistor. Not knowing
the exact LED's you have, no one can say exactly. If you want to be on the
safer side, start with a 1K resistor. Somewhere between 10 and 20 ma should
provide sufficient brightness. Disclaimer: If you burn them up, I'm not
responsible.

Bob