UNDERVOLTAGE_INDICATOR_FORBATTERY_OPERATED_EQUIPMENT

Published:2009/6/24 22:30:00 Author:May | From:SeekIC

Due to the low duty cycle of flashing LED, the average current drain is 1 mA or less. The NE555 will trigger the LED on when the moni-tored voltage falls to 12 volts. The ratio of R1 to R2 only needs to be changed if it is desired to change the voltage point at which the LED is triggered.



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