Dry cell charger circuit (2)

Published:2011/7/17 21:43:00 Author:TaoXi | Keyword: Dry cell, charger | From:SeekIC

You can make a strong-function high efficient dry cell charger by using the NE555 time base integrated circuit as the core, and add some external components. The dry cell charger circuit is as shown in figure 2-5. The low-frequency multivibrator is composed of the NE555 and the external components R1，R2，C1, when the voltage of pin-3 is the high level, you can charge the four dry cells through VD1 and R3. The oscillation frequency of the oscillator is decided by R1, R2, C1, according to the data of the figure, the oscillation frequency is about 80Hz, the electrical level of pin-3 changes with this 80Hz frequency.



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