How Do Remote Controls Work?
Generally, there are two types of remote controls: infrared (IR), and radio frequency (RF). Infrared remote controls work by sending pulses of infrared light to a device, while RF remote controls use radio waves in much the same way. Pragmatically, the biggest difference between the two is range. IR remote controls require a clear line of sight to the receiving device and their range maxes out at about 30 feet (9.14 meters). RF remote controls can go through walls and around corners, with a range of roughly 100 feet (30.48 meters). Most home entertainment components such as stereos, televisions and home entertainment centers use IR remote controls. The remote contains an internal circuit board, processor, and one or two Light Emitting Diodes (LEDs). When you push a button on a remote control, it transmits a corresponding code to the receiving device by way of LED infrared pulses. The idea is somewhat akin to flashing an SOS signal, but instead of letters, the flashing LED light is tran
ajn, December 30, 1999 Your Answer: There is an excellent Internet article that describes the complete operation of a remote control. In brief, when you press a button on the remote, you make an electrical contact on a circuit board inside the remote. An electrical signal results, which is then transmitted using infrared radiation to the appropriate device. The device, whether it is a television or VCR, will interpret the signal and perform the necessary action. Read the article from the website howstuffworks.com for a much more thorough explanation.
