Solar Engine Circuit - Small DC motor runs off of calculator solar cell in dim light HOME

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.

Solar powered motor circuit works in dimly lit room

Here is the solar engine circuit powering a photoflash

I do not gaurantee the accuracy or safety of any information herein.
This is only a graphic due to spam      HOME     Valid HTML 3.2!
Do not experiment with or build any of the above circuits.