How Do RC Transmitters And Receivers Work

Are you planning to upgrade your RC car with a new RC transmitter and receivers and don’t know how do RC transmitters and receivers work? Then this article is for you. It is pretty much important to know how transmitter and receiver work as it will help you to choose the exact model that you need according to your RC car. So let’s break it down!

How RC Transmitter work?

A transmitter is such a technology that takes your commands and gives it to the receiver for the next order for servos and the motors.

Now a day’s various types of transmitters are available out there. The cheapest transmitter you will find in the market is $30. However, the RC transmitter for helicopter or airplane with programmable features, computer simulators, and the model memory starts from $150 and go up to $3000.

Usually, the RC transmitter is made with a certain frequency so that it can operate. Analog and older RC transmitters work on lower frequencies that are determined by a crystal. On the other hand, the digital and modern transmitter operates in the gigahertz range with 2.4GHZ.

RC helicopter and airplane transmitter design with control sticks, that are self-explanatory. One of them is the throttle control stick and that is not spring-loaded in a vertical way. It means the transmitter won’t spring back after you start.

RC transmitter comes with this stick on right side or left as well as mode 1 or mode 2. Besides, it has a knob and a trigger to control several things.

Even some of them have something better than control sticks and it is the trim. It uses to change the position of the servo or start point of a motor controller finely. RC transmitter also has to reverse, that use to overturns the output signal of the control sticks.

Usually, a series of switches that include at the bottom of the transmitter controls the reversing. Another important part of an RC transmitter is the channel. The more number of channels includes the RC transmitter; it will allow you to control more things.

Such as, if you have an RC transmitter with three-channel you can control three things including three motors, three servos, or a combination of any of those. Additionally, servos and motor controllers receive the same type of signal.

If you want to have telemetry, expo, model memory, and Limited travel on better, you have to go for expensive transmitters. But an average price RC transmitter will be enough for the average project.

Expo is used for exponential rates. It will help you to the control linear movement of control sticks to get an exponential output signal curve.

On the other hand, the telemetry feature will spread information (for example, altitude, battery voltage, motor temperature,) from the RC car back to the transmitter and shows these on the transmitter.

Do you know what a limited travel system is? It means if you move your control sticks to their highest, you will only get a 30% signal. The entire feature makes an RC transmitter high quality to offer you better control over them.

Another great feature of an RC transmitter that helps it to offer high performance is model memory. It let you store trim settings in the RC transmitter. As a result, you can recall them for further use or remove the need of having to change every time if you have several devices.

To ensure proper communications you have to bind the RC transmitter with the receiver. The process is relying on the type of receiver and transmitter. Most of the RC transmitter requires 12v to operate, that usually supplied by 8AA batteries.

How does the Receiver work?

A receiver is a tool that usually receives the signals of the transmitter and then sends it to the individual channels by pulse position modulation commands.

Receivers have to operate with the same frequency that you are using on the transmitter. Especially you will find the transmitter and receiver two in together in the market. Extra or replacement receivers are mostly used. As a result, it won’t need to be switched out if you have more devices.

Usually, a motor controller sends receive to the receiver. By pointing it into one of the signal ports the receiver receives the single. Servo also gets power from the receiver.

You will find the Polarity of the plugs by error and trial. The receiver will work one way and the other way will use to show a flashing light. You have to ensure that one wire won’t connect one way and other wire with opposite polarity. Otherwise, it will get damaged.

Some motor controller or servo connectors come with a small plastic tab and can thus use with RC car receivers. You can easily remove it with wire cutters. But be aware of antennae of digital receivers as these are harder to reattach.

How Do RC Transmitters And Receivers Work – Summary

Now, are you clear about how do the RC transmitter and receiver work?  In short, it will work best if it perfectly suits the model and gets proper maintenance. On the other hand, if you worry about how to bind RC transmitter and receiver our guide is here to help you. So let’s enjoy the speed with your newly upgraded RC car to challenge the track.


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