Nicad Battery charger , easy to make.

Nicad battery charger , this circuit just use transformer not  CT and  3 LEDs lamp. And its very very simple circuit charger . This circuit constant current LEDs to adjust charging current. It uses LEDs that pass a constant  current about 15 mA for an applied voltage range of 2 to 18 Volt.
They can be paralleled to give any multiple of 15 mA and they light up when current is flowing. The circuit will charge single cell at 15 , 30 , or 45 mA , or cells in series up to the rated supply voltage limit about 14 Volt.
See schematic below :


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