The portable batteries charger has been designed to provide an opportunity to load NiCd batteries even in the outdoors from a 12 V battery of a vehicle. When the circuit is connected to the vehicle battery, D2 lights only if NiCd battery was connected with the correct polarity. Since even on the discarded batteries we have a certain tension, T1 opens and D2 flashes.


As the NiCd battery starts to charge, thru R and D6, lights D6. In the meantime C4 is slowly loading thru P1 and R4. The value of these components determines IC2 monostable period and thus loading time of the NiCd battery. For the components values shown in the schematic, this period can be adjusted with P1 between 26 and 33 minutes. The charching can be interrupted with the reset button S2.
Read the rest and view the portable battery charger circuit and for more batteries chargers.


NiCd battery charger circuit diagram

nicd battery charger
468x60 ApexBattery


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