Multi-purpose automatic charger circuit diagram

Published:2011/5/16 21:43:00 Author:Ecco | Keyword: Multi-purpose , automatic , charger | From:SeekIC

The circuit is designed for the single Ni-MH battery. In the figure: the electric supply is transformed by the transformer, rectified by the full-bridge, filtered by capacitor C1 and then it becomes DC current. LED1 is the power indicator, LED2 is the charging indicator light, T1 is the charging control transistor, which operates in the switching state; T2, T3 and capacitor C2 form a single stable trigger. R6 and RP constitutes a limited pressure sampling circuit, R7 is limiting the sampling resistor. When the circuit gets power, if it does not connect to the battery, transistor T2 cuts off because of no base voltage, transistor T1 is also off, there is no voltage output. At this point only the power indicator light LED1 is lit.



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