Arduino drives MQ4 to simulate methane gas sensor (gas sensor)

Table of contents

1. Sensor characteristics

2. Hardware schematic diagram

3. Controller and sensor wiring diagram 

4. Driver

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The MQ4 gas sensor can detect methane, natural gas and other gases in the air very sensitively, but the sensitivity to ethanol and smog is very low. Combined with Arduino, you can make fire methane, natural gas leak alarm and other related works.