In this project, we are going to build an IR remote control relay PCB that can control up to 4 onboard relays. This PCB can be used in different applications like where you need to wirelessly switch ON/OFF devices in your home or office from the comfort of your bed or chair.
Let’s learn to control our home appliance using the TV or DVD player remotes or smartphones phones like Xiaomi which is having an inbuilt IR transmitter.
Remote controls such as those used for your TV, DVD/Blu-ray or Cable box use infrared transmitters and receivers. The transmitter is basically nothing more than a flashlight that emits a light beam at a frequency that is lower than the human eye can detect.