Storage Battery Voltage Monitor (2)

Published:2011/5/16 4:47:00 Author:Sue | Keyword: Storage, Battery, Voltage, Monitor | From:SeekIC

Here we will introduce a storage battery voltagle monitor circuit composed of digital integrated circuit CD4011. The drivers can know whether the battery voltage is proper by observing the lights on the monitor. When the voltage is proper, the light doesn't work. When the voltage exceeds a certain value, the light will keep on working. When the voltage is reduced to a certain value, the lightwill betwinkling, warning the driver of the low voltage which need charging. Working Principle: As seen in the figure 7-49, the storage battery monitor circuit consists of four-NOT gate integrated circuit IC's 2 inside NOT gate circuit D1,D2 and resistor R1-R5, potentiometer RP1,RP2, capacitor C, transistor V, indicating light HL. When the voltage is proper, IC's 4 pin outputs low level, and V is disconnected, HL doesn't work. When the voltage is higher than the proper one, IC's 4 pin outputs low level, and V is connected, HLkeeps on working. When the voltage is lower than the proper one, IC's4 pin outputssquare form pulse, and V is connected and disconnected from time to time, HL keeps twinkling.



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