NiCAD Battery Charger with Current and Voltage Limiting

By | December 27, 2010

The following diagram is the schematic diagram of Ni-CAD Battery Charger circuit which featured with current and voltage limiting to keep the battery lifetime.

NiCAD Battery Charger with Current and Voltage Limiting circuit

The lamp L1 will be light brightly and the LED  will be out when the battery is low and battery charging in progress, but the LED is very bright and the lamp L1 dim when the battery is almost ready to use (charge complete). L1 must be a bulb lamp rated for the current you want (usually the battery capacity divided by 10).

The diode D1 should be at least 1 A, and Z1 is a zener diode 1 W with a voltage determined by the fill-charge battery voltage minus 1.5 V. When the battery is fully charged, the circulatory flow around the battery capacity divided by 100 mA.

NiCAD Battery Charger with Current and Voltage Limiting circuit
NiCAD Battery Charger with Current and Voltage Limiting was last modified: June 20th, 2012 by circuit diagram

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