Dry cell charger circuit (1)

Published:2011/7/17 21:14:00 Author:TaoXi | Keyword: Dry cell, charger | From:SeekIC

The dry cell charger circuit is as shown in figure 2-4. This circuit uses a timer chip and a relay. You can choose the timing time by adjusting the rotary switch S3, the timing range is 3-9 hours. IC2 timer integrated circuit is the universal device that can produce the long-term accurate timing. For the AA-size batteries, the optimum charging time is 5 hours, but the C-size dry cell is 9 hours. The timer is started by the button S1, the charging LED turns on randomly, the transistor VT1 makes the relay K act, so the charging begins. When the selected charging time is up, the relay releases, and the LED which means that the charging is complete will turn off.



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