Having crossed many challenges at every stage of its development, the technology used in garage door openers is now using transmitters (remotes) and receivers set to a certain frequency for their operation. The most recent frequency used in these garage remotes is 315MHz. This frequency provides the most secure and hack-proof system for operating garages. The frequencies at which these transmitters and receivers were operated are usually in the range of 300-400MHz. To know why 315MHz is the best operation frequency, let's delve into the stages through which the technology evolved.
Initial models for remote operation, simply transmitted and received radio waves of a certain frequency. The main drawback of this system was that, as the usage of remotes in a locality increased, the remotes interfered with the other receivers in the area. Hence, more than one garage door could be opened with a single remote. Therefore it turned out to be a threat to the safety of the garage. …show more content…
For introducing this singularity in the remote-signals, a code was sent along with the signal and this code was fixed and unique for a transmitter and receiver pair. Due to technical limitations of the transmitter circuit, only a small range of 256 codes could be set. This solved the issue of multiple interferences among local remotes but the safety of the garage was still under question. This system can be easily hacked into by attempting different codes on a basic transmitter. In localities where security was poor, these multi-code remotes became unpopular and instead they were adopted in operation of gates in complexes and apartment