Automatic tracking solar controller circuit

Posted on Mar 28, 2007

As illustrated, the control circuit by the NE555 and phototransistor, R1, C1, C2 and so on. Photodiodes 3DU12 when sunlight to photodiodes, due to its resistance becomes smaller, so that the voltage of the circuit 555 is greater than 6 feet,

Automatic tracking solar controller circuit
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6 feet threshold level 2 / 3VDD, the circuit is in the reset state, 3-pin output is low level, the relay J pull, Figure (B), J1 contact connected to the motor M starts to drive slowly rotating gear. Go to a certain angle, photodiode light because it weakened resistance gradually increased, so that the charging time due to C1 potential drop of 2 feet, the light level is below the pin 1 / 3VDD, the flip circuit 555, 3-pin output It showed a high level "1" relay J release, the motor stopped due to power failure, when the sun again illuminated photodiodes, and start the motor, branched sun tracking.

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