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Easy-auto-alarm

2016-02-20 00:52  
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Timing information alarm circuit by (a) (b) show. If you are using incandescent lamps instead of a resistor, you'll get an extra feature, open enrollment targets. R value should be less than 1 KO. By keeping a low resistance, to avoid false tripping water collecting under the hood. If your door switch is connected to 12 V, rather than ground, using a single  transistor as a courtesy light inverter input.

Easy-auto-alarm 
 

When leaving thevehicle,armedflipthe switch, it willclose the door,armeddevice.Then openaportaltriggerstwotimers.Entry delaytimerexpires,the alarm timecontrolledby thestopwatch.

 



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