This repository contains the source code for the firmware used to read the measurements taken by a MH-Z19B infrared co2 sensor and publish them to our MQTT server. The firmware provided here uses the ...

What do you need to build an Arduino Speed Sensor. Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, and it is also very ...

For Power supply purposes, I decided to use a 12V DC Power Adaptor to power this whole setup through a barrel jack connector. In the below image, you can find our actual hardware setup of our ...