Alcohol detector and engine cut off. 2013-06-29

in order to start the car you have to blow to the sensor having a flowsensor (can be madeform a heated filament when blown the resistance drops and this can be detected. but for test we use condensor MIC) . its also coupled with a alcohol sensor. it is passed through a combinational logic and then a decision is taken whether to turn on / off the engine.

>>the sensor is attached with the lm3914
>>the output is attached to 74147
>>the outputs will get high in bargraph mode
>>it is decoded...

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