NI CD BATTERY CHARGER
Battery Charger Project
In our project we have used 2AA size Ni-Cd Battery which is commonly available and can be used in many appliances. This circuit can also recharge common dry cell battery for fewer times at certain level.

Nickel-cadmium cells have potential of 1.2 V. So Nickel-cadmium batteries come in multiple of 1.2 V for eg 2.4V, 3.6V, 4.8V etc but it maintains constant voltage throughout their service life and about 0.8–1 V when discharged.
The chemical reaction which occurs in a NiCd battery is:
2 NiO(OH) + Cd + 2 H2O ↔ 2 Ni(OH)2 + Cd(OH)2
Here is a simple and slow charger for better life of small Ni-Cd battery. Charge it for 6-12 hrs using this circuit.

circuit diagram of Nickel Cadmium (Ni Cd) battery charger
Part List:
Step Down Transformer 0-6 V
Mains Cord
Diode 4007
Resistance 10 Ω X2 Pcs
LED
Battery Container
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