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anandzoom
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Let us assume a remote controlled car which operates at 2.4GHz frequency band. When the accelerate or left or right turn button is pressed what value changes so that the car detects which button was pressed?
The remote control sends a signal to the car's receiver, which is programmed to receive and interpret specific codes for each button. When a button is pressed, the corresponding code is sent and the receiver activates the corresponding function on the car.
Most remote controlled cars use radio frequency (RF) technology for communication between the remote and the car. Some may also use infrared (IR) technology, which uses light signals instead of radio waves.
The remote control and car's receiver are both equipped with a transmitter and a receiver. The transmitter on the remote sends out radio waves or light signals, which are received by the receiver on the car. The receiver then interprets the signals and activates the corresponding functions on the car.
Most remote controlled cars can only be paired with one specific remote control at a time. However, some advanced models may allow for multiple remotes to be paired and used simultaneously, usually by using different frequency channels.
Some remote controlled cars use a unique pairing code to prevent accidental pairing with other cars. However, if the remote and car are not equipped with this feature, it is possible for the remote to accidentally control a different car if they are in close proximity.