MQ-7 CO Sensor
Sensors · Board: ESP32 · Day 33 of 100
Detect carbon monoxide with an MQ-7 on the ESP32 and raise an alarm. A focused safety build with real stakes.
How it works
The MQ-7 runs heating cycles that make it sensitive to carbon monoxide, and the ESP32 watches its output for dangerous concentrations. Crossing the safety threshold latches the alarm on until levels fall. A focused build where getting the threshold right genuinely matters.
What you'll learn
- CO sensor heating cycles
- Safety threshold design
- Alarm latching logic
- Gas sensor selectivity
Full project: code, wiring diagram & Wokwi simulation
The complete build guide lives in the original repo. Ours is a summary — the real thing is one click away.
Open full project on GitHub ↗Summary by SkillShop. Project by Kritish Mohapatra — code and diagrams belong to the original repo.
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