MQ-2 (Smoke / Butane Hydrogen ) Sensor Module

From the shop's description

MQ-2 (Smoke / Butane Hydrogen ) Sensor Module is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. This smoke sensor module with MQ2 Smoke sensor have both digital and analog outputs , you also can adjust the sensitivity with the potentioneter. PIN Connection 4 pins as follows: VCC (5 V) GND (ground) Aout (Analog output) Dout (Digital output) When connect to arduino, use digital pins in digital mode (high or low) and use analog pins for analog mode (diffrenet value for different smoke intensity). It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.