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Subject: Re: Constant current sources to drive LEDs on long lines

Date: 02/25/03 at 7:12 PM
Posted by: Russ Kincaid
E-mail: russlk@netzero.com
Message Posted:

In Reply to: Re: Constant current sources to drive LEDs on long lines posted by David Ambry on 02/25/03 at 5:52 PM:

If you operate from the 10-32 volt unregulated source, an LM317 supplying 8 volts to an LED-series resistor network will be the simplist. The resistor will be about 270-300 ohms for 20 mA to each LED. The resistance of the wire will be negligible compared to 270 ohms.


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