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You are here: Experts > Home/Garden > Home Appliances > TV/VCR/Stereo Troubleshooting > Infrared Signal
Expert: cleggsan
Date: 9/3/2008
Subject: Infrared Signal
Question
Im doing a project on the IR to RF transmission. How would the infrared signal being converted to Radio signal since they use diffrent frequency all together?
Answer
IR or Infra Red signal is like a light beam. Compare it to a flashlight beam. It is not an electromagnetic propagation but a light beam that is outside the visible spectrum so your eye does not see it but it is there.
RF or Radio Frequency transmission is by propagation of an electromagnetic field. It is quite different in its principle of operation and its implementation.
To convert an IR signal, say from a remote control, to an RF signal it must be passed through a converter. The converter will decode the information content on the IR beam and use it to modulate an RF carrier.
You can google for an IR to RF converter and find many interesting and informative sites to read.
Here is a schematic of one particular solution:
http://www.circuitstoday.com/?p=299
Please let me know if you have further thoughts.
C
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