NiMH Battery Chargers


Posted on Feb 5, 2014

Widely available AA NiMH battery chargers are in the market, even those already in a single package that can be used to charge other battery types such as NiCd, NiCad, and other types. Battery charger in this project is designed for two AA NiMH or NiCd cells of any capacity (as long as they are the same) at approximately 470 mA which will use the


NiMH Battery Chargers
Click here to download the full size of the above Circuit.

USB port as power. This battery charger will charge 700mAh NiCds in about 1. 5 hours, 1500mAh NiMHs in about 3. 5 hours, and 2500mAh NiMHs in about 5. 5 hours. Charger incorporates the automatic bill cut-off circuit based on cell temperature, and the cells can be left in the charger indefinitely after the cut-off. The NiMH Battery charger schematic can be viewed as follows: As important to know that any USB port can supply 5V up to 500mA. USB standard specifies that the device cannot use more than 100mA until it has negotiated the right to use the 500mA, but apparently no USB ports enforce that requirement. This makes the USB port is a convenient source of power for devices like this charger.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Siren alarm simulates star trek red alert
    Ultra-precise long time delay relay
    Low-battery-warnlng-disconnector
    Very-short-pulse-width-measurer
    Digital Main Voltage Indicator
    A Regenerative Receiver with AGC for 80 Meters or 3-10 MHz Shortwave
    Bandwidth reduction of DXTV video
    Voice Shield for Arduino
    A Low-Frequency Crystal Controlled Oscillator
    SRS5250S Application circuit diagram
    555 meter circuit diagram of the analog information Qigong



    Top