Zero, one, three, fun.


This device I call my fire control circuit as it uses green LED's, which of course you expect to produce light when you apply a voltage to them. Unexpectedly someone found out that if you shine sunlight on them they produce a current which is used to switch a circuit. I immediately observed that this makes perfect sense and is an example of the principle of microscopic reversibility


The washer acts as an umbrella to obscure the sun's rays from any of the LED's when in perfect alignment.
The circuitry switches 12 volts which powers a 7192:1 gear motor from Grainger which will align an array of Fresnel lenses to focus on a 10' long 3" diameter Aluminum pipe threaded on both ends. I can pump waste vegetable oil through this pipe and capture process heat for filtration, drying and to drive the chemical reaction to produce biodiesel.