what is the differenc from a remote control signal and a cell phone signal?

Question

if i look at each circuit design, can i be able to build my own remote control by a specific sequence arrangement of electronic parts to get the desired signal?? what is the most sensitive task to make the signal perfect.. can someone explain the correct technique

Answer 1

Remote controls are transmitters, generally operating using infrared spectrum of light. therefore they do not work through objects in the path, and are considered line-of-sight devices.

Cell phones are transceivers, which transmit and receive, signals in a series of predetermined bands of radio frequencies. They do not operate on line-of-sight as the radio waves can penetrate some solid objects.

Answer 2

wow.. ok well from my understanding your radio contolled iitems such as tv remote radio controlled cars car starter and stuff like that uses a certain frenquency to tranmist a radio sine wave and the receiver's antena is tuned to that frenquency along with some diodes and crystal osalators for fine tuneing but you get the idea but on the other hand your cell phone witch uses CDMA ( code division multiple accesse ) allows multiple people share a frenquency to be sent the the cell site then to the satilites then back to a cell site then to whom ever your calling. we started useing CDMA a few years ago its still being develpoed. this is why a modern cell phone conversation can not be traced because their is not a certain frenquency that phone is on and if someone did pick up a single and some how taped into it all they could hear is static or "white noie" not sure if this helps you but that the best i can explain it off the top of my head. sorry for speeling/grammer errors. lol thats why i am going to college for electronics and not englshish major i guess =P

Answer 3

Depends on what the desired outcome is. Cell phones are transceivers designed to carry digital voice/data traffic. A remote control can be a far simpler circuit with minimal encoded information (e.g., on/off). Any basic transmitter/receiver combination can be used as a remote control.

Answer 4

Most remotes (like for TV's) are infrared. Cell phones use different types of waves.