Automatic charging, power supply dual-use device circuit (1)

Published:2011/7/14 2:07:00 Author:TaoXi | Keyword: Automatic, charging, power supply, dual-use, device | From:SeekIC

The automatic charging, power supply dual-use device circuit is as shown in the figure 4-2. IC1 is the three-port voltage stabilizer LM317T, it forms the adjustable voltage stabilization power supply, the output voltage can be adjusted in the range of 1.25V-20V through RP1; IC2 is the CD4060, it is designed as one kind of 14-stage binary addition calculator/oscillator, the timer and pulse generator is composed of this calculator/oscillator and the external components. IC3 is the NE555, it forms the simple automatic charging circuit; IC4 is the sampling controller that is composed of the four-two input NAND gate CD4011 to control the conversion of the charging current. After the battery is installed, it gives a positive pulse to the pin-12 of IC2 through C6, the IC2 starts to oscillate, the oscillation frequency is about 1.8Hz that is decided by the R6 and R7.



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