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How to Check if a Remote Control is Transmitting an Infrared Signal
Michael M, Mark R, Travis Derouin, and 12 others
March 15, 2014
Many households have 5 or 6 remote controls laying around the house. Sometimes, it stops working and you don't know what happened.
Most remote controls use infrared light to transmit the signal. The human eye cannot see this light, however a camera can. This article will explain how to detect whether or not your remote is still giving a signal.
GO TO THIS SITE AND FOLLOW THE DIRECTIONS
http://www.wikihow.com/Check-if-a-Remote-Control-is-Transmitting-an-Infrared-Signal