12 VOLT GEL CELL CHARGER


Posted on Dec 9, 2012

When a discharged gel cell is connected, the charger goes into a fast charge mode at a fixed rate of 400 ma. After the chip detects the voltage leveling off or when 4 1/2 hours has elapsed. (which ever happens first.) the fast charge will stop. After the fast charge has ended, the IC goes into a trickle charge rate of about 50 ma. This trickle charge continues until 13.8 volts is reached which will stop all charging current since the cell is now fully charged. If the cell voltage should drop for any reason, either a fast charge or trickle charge (IC will detect what is needed) will start again.


12 VOLT GEL CELL CHARGER
Click here to download the full size of the above Circuit.

When constructing this circuit, be sure to attach a small heat sink to Q1. Apply a DC (partially filtered) voltage of at least 15.3 volts. The voltage must never go below this level even under load conditions. Many of the DC wall transformers available wi




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Proximity Camera Head (A2047) Manual
    Microchip Tutorial
    Data-based Load Pull Amplifier
    dc motor driver with h bridge ic l293d
    digital to analog
    Car and Motorcycle Battery Tester
    MW0LLO RF Milliwatt Meter
    Telephone Ringer
    Direction Sensitive Light Barrier
    Basic circuit diagram connection of signal and power ISO103



    Top