Your smartphone can be used to check if your TV remote is working properly

Often you find that one of the many remotes in your house isn’t working. You tap it to try to get it to work, next you proceed to pointing it from all possible angles, and eventually get frustrated and open up the back panel to change the batteries. However, before doing any of that there is a simple way to check if the remote is still transmitting a signal. Just start up your default camera app, point the remote to your smartphone lens and voila! If your remote is working, you’ll be able to see a purplish light emanating from the remote’s IR bulb when looking through your camera. The reason is that while your eyes can’t see in infrared, your camera can.