Delay singal light battery life circuit

Published:2011/5/13 2:49:00 Author:Nicole | Keyword: singal light, battery life | From:SeekIC

Chopped wave oscillator is composed of the first two 4011 CMOS four NAND gate , the duty ratio is changed by 1MΩ potentiometer. As interface, the third NAND gate is connected to NPN high gain power transistor. If the bulb's current is higher than 1A, then paralleling a NAND gate ; if it does not parallel, you can connect the input terminal of the fourth NAND gate to IC's (14). Before power supply is turned on, potentiometer is adjusted to the middle position, then it can be regulated. In order to make the battery life 3 times longer than before, it should provide singal light discontinuous current and double voltage with 50% duty ratio.



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