Design solar panel with bateries for pc fan at radiation shield part 2.

  • Ηi again
    I make a electronic circuit with 2N2222 tranzistor, and CA3140E microcircuit, i drive to relay with better accurace,with trimmer i tuning at how voltage i want to drive the relay.
    I have some photos
    All it is the same with other project ,except the relay circuit
    Fan turn the day with full speed ,and the night at half speed

    Best regards from Greece

    Edited 3 times, last by weather19671967 ().