12V NiCAD Battery Charger Circuit Schematic
Source: InternetPublisher:兰博 Keywords: Battery charger battery circuit Updated: 2024/06/07
The figure below is a schematic diagram of a 12V NiCAD battery charger with a charging rate of 200mA/Hour.
Components List:
Resistors: 1KOhm, 68Ohm, 2KOhm, potentiometer 10KOhm
Diode: IN4001, 2xZenerIN752
Transistor: 2N2219, 2N2222
This NiCad battery charger circuit charges a battery at 75mA until the battery is fully charged and then reduces the current to a trickle rate. It will fully charge a dead/unpowered battery in 4 hours and the battery can be left in the charger indefinitely. To set the shutoff point, connect a 270 ohm/2 watt resistor between the charge terminals and adjust the potentiometer to 15.5V.
The input voltage of this battery charger circuit is 24VDC, you can use a universal power supply or a 24V lead-acid battery from your car.
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