Automatic charger circuit with the manual trigger function

Published:2011/7/18 3:42:00 Author:TaoXi | Keyword: Automatic, charger, manual, trigger function | From:SeekIC

Operating principle: The circuit is as shown in figure 4-5. The city electricity is reduced by transformer T, the subprime output voltage is rectified by the bridge type rectifier circuit which is composed of the VD1-VD4, and then it is filted by the C1 to be the DC voltage, at last it produce the +5V stable voltage through IC1: it can be used as the reference voltage of the control circuit, and it also supplies the operating power to IC2. At the same time, the bridge rectifier is divided into two parts, and it outputs two groups of inverted half-wave rectified pulsating voltage through the two ends of the secondary coil to charge the four Nickel-cadmium batteries respectively. The LED1 can be used as the charging indicator light, the R6, R7, R8 are the current-limiting resistance.



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