MQ-5 Gas Sensor User Manual
Contents
1. the development board Then power up the development board and start the serial debugging software Here is the configuration of the connection between the module and the development board MQ 5 Gas Sensor User Manual Waveshare Port STM32 MUC pin DOUT GPIOA 4 AOUT GPIOA 6 GND GND VCC 3 3V Port Arduino pin DOUT D2 AOUT AO GND GND VCC 5V Warn up the sensor for a minute 4 The detected result can be checked by the LED indicator on the module Put the sensor into a container filled with sensitive gas you will find the indicator turns on While take the sensor out of the container you can see the indicator turns off2. MQ 5 Gas Sensor User Manual Waveshare MQ 5 Gas Sensor User Manual 1 Features Sensitive gas Liquefied gas natural gas and coal gas Boost converter chip PT1301 Operating voltage 2 5V 5 0V Dimensions 40 0mm 21 0mm Fixing hole size 2 0mm Operating principle MQ 5 gas sensor applies SnO2 which has a lower conductivity in the clear air as a gas sensing material In an atmosphere where there may be inflammable gases the conductivity of the gas sensor raises along with the inflammable gas concentration increases MQ 5 plays a high performance in detecting butane propane and methane and can identify both propane and methane at a same time MQ 5 is highly sensitive to natural gas It features with the ability to detect various inflammable gases and lower cost making it an ideal choice of different applications of gas detection 2 Applications This module can be applied to liquefied gas natural gas and or coal gas monitoring devices for household or industrial usage 3 Interfaces Pin No Symbol Descriptions 1 DOUT Digital output 2 AOUT Analog output 3 GND Power ground Positive power YE supply 2 5V 5 0V 4 How to use We will illustrate the usage of the module with an example of sensitive gas detection by connecting a development board Download the relative codes to the development board Connect the development board to a PC via a serial wire and the module to
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