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Ni Cd Battery Charger 12 18V Wiring diagram Schematic
Ni Cd Battery Charger 12 18V Wiring diagram Schematic
Build a Ni-Cd Battery Charger 12-18V Circuit Diagram. A clever charger schema that safely can charge any Ni-Cd battery. Offers charge current selection, polarization detection and protection and the ability to connect many batterys in series.
Ni-Cd Battery Charger 12-18V Circuit Diagram
Ni-Cd batteries can be recharged more than 1000 times before become useless. the charging current should be the 1/10 of the (Ah) of the battery. The batteries need 14 hours to be fully charged.. Switch S2 is the current selection as follows: 50mA, 200mA and 400mA. LED D10 is the indicator for proper battery connection and/or wrong polarity checking. LED D9 is the charging indicator. The transformer is a 220V/2x12V 0.5A.
PARTS:
R1,R4,R5=10K
R2,R3=100K
R6,R8,R10=1K
R7=820
R9=100
R11=15
R12=3,9
R13=1,8
C1=1000uF/40v
C2=470pf
D1-D4,D6=1n4001-7
D7,D8=1n4148
D9,D10=LED
IC=741
TR1=BC548
TR2=BD137
TR3=2N3055
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