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September 2, 2008
The Sun Switch senses the position of the sun for a solar tracker. This is a test circuit to see if green LEDs can provide TTL logic levels into a motor control circuit. When green LEDs are exposed to direct sunlight they will generate a voltage. This circuit uses three LEDs in series which produce about 5.1 volts when aimed directly at the sun. The circuit and pics will be posted on www.greenwatts.info