John is correct, I have made a switcher for my nav lights which have a 3 watt luxion star LED and reflector, and are marginally dimmer than the 20 watt incandescent they replaced, current drain dropped from 1.5 amps to 200ma, and the heat from burn your fingers to ambient warm.
Cheers Nigel > > Since when did LED's need AC inverters? LEDs are best driven with constant current. The most efficient way (lowest battery drain) to do this is to use a switching regulator. there are several ICs specifically intended for this application, which use just a small inductor (the frequency is quite high) a couple of capacitors and a resistor or two to give constant current through the string of LEDs over a wide range of input voltage. John G. _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
