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MQ-2 Gas Sensor Module – Quick Start Guide
Also check Single Cell Lithium Battery Boost Power Module Board offered by Robocraze
disadvantages
Technically
and an upgrade path to Digi mesh or ZigBee mesh protocols if desired
E18-D80NK Infrared Sensor Module raspberry pi 3B+ MQ-2 Gas Sensor Module –E18 D80NK Infrared Sensor Module The E18 D80NK Adjustable Infrared Sensor Switch 3 80cm is a set of transmitters and receivers in one of the photoelectric switch sensors. The detection distance can be adjusted according to the demand. The sensor has a detection range of 3 80cm. The Adjustable Infrared Sensor Switch is small, easy to use, inexpensive, easy to assemble and can be widely used in a robot to avoid obstacles, interactive media, industrial