Simple Solar Engine Circuit Diagram Small DC motor runs off of calculator solar cell in dim light. How do we achive 10nA operation? By using diodes in place of pull up
resistors, and by isolating the DC load from the trigger circuit via
junction drops and the 10nF capacitor.
If there is too much power comming from the solar cell then the motor
might run too often or even continuously. You can avoid this by putting a
100K ohm resistor in series with the solar cell.
Simple Solar Engine Circuit Diagram
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