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NiCd Battery Charger [Project]
posted October 18 2013 12:40.29 by spic0m




The design of the charger is similar to that of many commercially available chargers. The charger consists of a mains adapter, two resistors and a light-emitting diode (LED). In practical use, this kind of charger is perfectly all right. Resistor R1 serves two functions: it establishes the correct charging current and it drops sufficient voltage to light the diode. This means that the LED lights only when a charging current flows into the battery. The charging current is about 1/4 of the battery capacity, which allows a slight overcharging, and yet the charging cycle is not too long (4-5 hours).

[Link: diyelectronicsprojects]
 
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