555 multi-purpose car alarm circuit

Published:2011/4/26 8:17:00 Author:TaoXi | Keyword: multi-purpose, car alarm circuit | From:SeekIC

As the figure shown, alarm circuit is composed of a 555 and a four 2-input NAND gate circuit. When the oil pressure is too low and the brake pressure is too low, this circuit will issue the warning sound; When the car is steering, this circuit will issue the intermittent sound to tell the driver turn off the turn-light.



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