How to use MQ-2 gas sensor for smoke detection?
Aug 21, 2025 · 4 min read · Here’s a practical, no-nonsense guide to using an MQ-2 for smoke detection with Arduino. What the MQ-2 is (and isn’t) Detects: smoke/particulates via combustible gases (LPG/propane, H₂, CH₄, alcohol, etc.). Output is analog (resistance change). No...
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