| Summary: | Strong growth in demand for cars , air pollution will reduce the quality of
human health . One of the pollutants generated by motor vehicle emissions are
carbon monoxide ( CO ) and nitrogen oxides ( NOx ) .CO gas and NOx gas can
cause health problems for humans , even if exposed to the concentration limits
specified period of time and can lead to death . Emission test device has been
available in many auto repair shops , but by the time the emissions test , just read
the source or sources of gas emissions from the exhaust vent .
This final project aims to design a carbon monoxide detector and nitrogen
oxides detector, that device will indicate the level of carbon monoxide ( CO ) and
nitrogen oxides ( NOx ) into 3 categories of air quality , safe , and the danger
threshold . the system will automatically warn the driver if the gas exceeds the
threshold . microcontroller is used as the central data processing center and the
data is ATMega8 microcontroller gas sensor using MQ-7 and MQ-135. The
design begins with the schame of hardware and software design using CVAVR
and proteus 7 professional.the testing phase is done by using gas by testing tool
using a source from exhaust vent. There are three actuators , the LCD will display
the levels of CO gas and NOx gas , the Buzzer will give a warning buzzer sounds
when gas exceeds the threshold , and the LED will give an indication of certain
conditions .
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