I understand integrated circuits and logic gates. My question is how does the electrical current actually help to perform the action of the device. (remote, game controller, tv, etc).
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Remote devices can either use radio frequency signals or some other media, such as infrared or ultrasonic. With radio signals, there is a high frequency carrier on which is modulated a signal that could be a square wave with a series of pulses that make up a coded signal. A receiver receives the radio signal, rectifies it to extract the coded signal. A decoder interprets the command and causes the required action.
Pulsating infrared signals are also often used. A television remote, among other remote controllers, use infrared. A coded electrical signal, that switches current on and off rapidly, illuminates an infrared emitting LED. The pulsating infrared is detected and decoded by a controller in the television to initiate the required action.
Pulsating infrared signals are also often used. A television remote, among other remote controllers, use infrared. A coded electrical signal, that switches current on and off rapidly, illuminates an infrared emitting LED. The pulsating infrared is detected and decoded by a controller in the television to initiate the required action.