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Posted for "David Lowry" <dave@edt.com>:
Jeff,
I looked at your schematic. Most of the heat is in the resistors you use
to set the current in the LED. If you want to reduce that you could use
a high efficency step down regulator (involves an inductor) to get a
lower voltage. This will give less power wasted in the resistors.
Maybe you would not need the heat sink. A much more complicated circuit but there are many chips that do it.
A purpose built circuit could be designed to dump just the right amount
of charge through the LEDs and eliminate the resistors all together.
Again more complex but puts all the power into the LED.
A temperature detector would solve the melted rudder scenairo.
I have no personal interest but if you like your idea of LEDs in the
rudder it could be solved albeit with added complexity.
David Lowry, Legacy
I posted new photos of the LED tail strobe, now with the circuit completed, at http://w1.lancair.net/pix/led-strobe
i also posted the schematic.
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