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Breathalyzer circuit using 8051

17,500.00

Breathalyzer circuit using 8051 project enables you to check the blood alcohol content from the breath of a person which is then displayed to the LCD.

Project Information:-

This article is about a breathalyzer circuit using 8051 microcontroller which outputs the blood alcohol content (BAC) from the breath. The BAC is displayed in percentage on a 3 digit seven segment display. The microcontroller used if AT89S51 which belongs to the 8051 family and the alcohol sensor is MQ135 gas sensor from Futurelec.

Additional Information

Language used:- EMBEDDED C

List of Components:-

Alcohol sensor (MQ135)

IC (ADC 0804)

Microcontroller (AT89S51)

7 segment display

Transistor (2N2222)

Switch

Capacitor (150pF)

Capacitor (22uF/10V)

Capacitor (10uF/10V)

Resistors:

100 ohm

10k

22k

8.2k

330 ohm

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