[sdiy] powering LEDs

[harrybissell at wowway.com]

Hi Drew

I would put them in series across the +15 and -15V volt rails with
a suitable dropping resistor.  If they are on all the time, there will
be no problem with noise / voltage drops as there would be if they were
flashing.  

Each RED led with be like 1.7V forward drop, so add the total volatge
drop, subtract from the total voltage, and then calculate the series
resistor to get the current you want.

H^) harry



On Wed, 06 Aug 2008 09:47:37 -0500, Dump Static wrote
> Can someone point me to a way to connect a group of LEDs to the 
> standard +15/-15 volt power rails of a module?
> 
> I would like to add some LEDs to a module for illumination; they 
> would be on whenever the module had power.
> 
> Just standard red ones...
> 
> thanks :)
> Drew
> 
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Harry Bissell & Nora Abdullah 4eva