Ni-Cd Charger

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Ni-Cd Charger

This is a NiCd/Ni-MH charger that can charge with constant current and automatic charge termination when the total voltage for all cells reach the setting voltage.

I design this project to charge for 4 cells Ni-Cd/Ni-MH only .After assembly all components into PCB then adjust VR1 to get the voltage at pin 5 of LM555 is 5.8-5.9V or about 1.45 V/cell (1.45 x 4 = 5.8V) This circuit charging the battery at about 270 mAh or 10% of C (my battery is sanyo Ni-MH 2700mAh) .You can change the charge current by replace R2.

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Ni-Cd Charger - Link

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