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Last Updated on:  10/16/2009 10:57:51 AM

Model Airplane Wing Tip Flasher
designed by David A. Johnson, P.E.
The circuit below is designed to flash two white LEDs mounted at the wing tips of a model airplane.  The flasher unit is powered by a 4.5v supply made of three AA or AAA 1.5v alkaline battery cells.  The average current is about 2ma so a set of batteries should last about 1000 hours of flashing. The circuit uses one hex Schmitt trigger inverter to perform all the timing functions. A single n-channel FET drives the two LEDs, each with a peak current of about 20ma.  The circuit flashes the two LEDs in a pattern typical of commercial airplanes. 
 
Click on Schematic below to view PDF version of this Circuit

circuit model airplane wing tip flasher
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