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The HLK-20M05 5V/20W Switch Power Supply Module is a PCB mounted isolated switching step-down power supply module with a plastic enclosure
IGBT co-packaged with HEXFRED TM ultrafast
SPI serial port
Model MQ-8 Type Hydrogen Gas Sensor Module No
7A Rated Power 130
MQ-3 Gas Sensor Module 0.47uf 63V Poly film Capacitor The HLK-20M05 5V/20W Switch PowerMQ 3 module can detect alcohol, benzene, CH4, hexane, LPG, and CO. The sensitive material in the MQ 3 gas sensor is SnO2, which has a reduced conductivity in clear air. When the target alcohol gas is present, the sensor's conductivity increases in accordance with the increase in gas concentration. The MQ 3 sensor has a high sensitivity to alcohol and is resistant to fuel, smoke, and mist contamination. Based on the amount of alcohol in the system,
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