RC controllers are the life blood of any radio controlled system. If there is no transmitter to tell the RC unit what to do, then nothing happens. The RC controller is the first essential part of the 3 essential elements for any RC controlled unit. You have the transmitter or RC controller, the receiver which receives the signals from the transmitter and the servos which take the received signals and control the movement of the RC unit.
What makes it possible for numerous RC controlled units to be operating at the same time is each transmitter has certain crystals that emit frequencies on a very specific channel. RC controllers are allocated specific frequencies and then from there, they can be even further broken down into sub frequencies which allows for so many different models of transmitters.
The RC controller comes with levers or dials that control servo motors on the RC receiving unit and each movement on the controller is directly proportional to the movement of the servo motor and whatever that servo motor is operating.
What makes the RC controller work is the crystals that are used in pairs in the unit. These crystals with the electronics in the controller put together signals that are then transmitted through the antennae to the receiving unit that is setup to receive signals on the frequency that the sending unit it using to send them on.
The crystals can be changed out to allow for the occasion when there are other units using the same sending signal. By changing the crystal, it will change the frequency of the sending unit, then the operator calibrates their receiving unit to the new unit allowing for the two units that were in conflict to now operate without affecting each other.
Depending on the brand and type of RC controller, the price can vary widely. The smaller inexpensive transmitters don’t have the longer range or as many channels so you need to choose one carefully for what you are going to be controlling. Shorter ranges might be OK for an RC car, but it could mean the difference between safely landing or crashing for an RC airplane.
We cover some the different types of transmitters on this site and provide you links to some of the best deals for them on the Internet so you can save some money and find what you need all in one place.
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