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magvitron

Alcohol detector and engine cut off.

in order to start the car you have to blow to the sensor having a flowsensor (can be madeform a hea

  1. magvitron
    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 by 74147
    >>its given to 7447 ( 7 segment decoder)
    >>the alcohol level is displayed to 7 segment.
    >>the lm 741 is used as a flow detector (in place of switch use a condenser MIC)
    >>the maximum alcohol level is detected by 3914 and its use to trigger a latch
    >>the output is anded with the input from flow sensor.
    >> then its passed to a transistor logic for turning on the path to the engine.

    2334.jpg

    Proteus file:

    View attachment asdasd.zip

Recent Reviews

  1. ElectroMaster
    ElectroMaster
    5/5,
    Great Circuit. These should be in every car!