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It will be easiest to make a carbon monoxide detector using an MQ-7 sensor and an Arduino.

[URL unfurl="true"]https://www.theengineeringprojects.com/2024/02/mq-7-carbon-monoxide-sensor-datasheet-pinout-working.html[/URL]

[MEDIA=youtube]aNOm4fNDnh4[/MEDIA]

Carbon monoxide (CO) is not usually present in fresh air therefore, the sensor does not provide any signal until it senses any leakage or danger. Just like other MQ sensors, MQ-7 also has a sensitive element made of ceramic that has a layer outside it. This layer consists of tin dioxide (SnO2) and has the feature of absorbing the target gas. In the case of MQ7, the tin dioxide absorbs the carbon monoxide and indicates its presence as soon as it comes in contact.


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