There are no reviews yet.
Your email address will not be published. Required fields are marked *
Your review *
Notify me of new posts by email.
The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do.
MQ-4 gas sensor has high sensivity to Methane, also to Propane and Butane. The sensor could be used to detect different combustible gas.
The PIR Sensor detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects.