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MQ-2 Sensor of Gasaspon Attake: DC5V Power (current): 150MA DO Exit: TTL Digital 0 and 1 (0.1 and 5V) AO Output: 0.1-0 .3 V (relative with gas pollution), maximum concentration-approximately 4V .Name: Once the sensor is powered, it takes time to warm up, 20s, VCC: Positive Note Signal (5V) GND: Negative Water Signal
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