INTRODUCTION TO SIMPLE IR REMOTE SWITCH CIRCUIT Most of the Remotes used in our home appliances are based on IR ( INFRARED ). INFRARED rays are a part of Frequency Spectrum, in which they lies just below the visible light. So we can't be able to see them with our naked eyes. If you wants to see an INFRARED ray, just press and hold a button on your tv remote and point its led to a camera and you can see the ray on screen. I think you already know that. Ok. Right back to our topic, It is quite easy to control an appliance with a remote, isn't it.....? Yeah. And It is not a difficult task to make an appliance controlled by a remote. Now i am going to demonstrate you with an LED, just turn ON and turn OFF.