MQ 7 CIRCUIT DIAGRAM
Arduino CO Monitor Using MQ-7 Sensor - instructables
1. MQ-7 CO sensor. Most commonly available with this Flying Fish sensor module, it has to run through a small modification, details in the next step, or you can use a separaten MQ-7sensor. 2. NPN bipolar transistor. Virtually any NPN transistor that can handle 300 mA or more will work here.
MQ-135 Gas Sensor Pinout, Features, Alternatives
Where to use MQ-135 Gas sensor. The MQ-135 Gas sensors are used in air quality control equipments and are suitable for detecting or measuring of NH3, NOx, Alcohol, Benzene, Smoke, CO2. The MQ-135 sensor module comes with a Digital Pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying..
Smoke Detection using MQ-2 Gas Sensor - Hackster
May 06, 2016The MQ-2 smoke sensor is sensitive to smoke and to the following flammable gases: The resistance of the sensor is different depending on the type of the gas. The smoke sensor has a built-in potentiometer that allows you to adjust the sensor sensitivity according to
MQ135 Alcohol Sensor Circuit and Its Working - elprocus
Working Principle And Circuit Diagram. The MQ-135 alcohol sensor consists of a tin dioxide (SnO2), a perspective layer inside aluminium oxide micro tubes (measuring electrodes) and a heating element inside a tubular casing. The end face of the sensor is enclosed by a stainless steel net and the back side holds the connection terminals.