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Picture 4-5-2 Infrared receiver Head circuit diagram and physical map
4.5.2 Working Principle
Remote control system is generally composed of remote control (transmitter), receiver, when you press
any button on the remote control, the remote will produce the corresponding coded pulse, output a variety of
infrared as the medium of control pulse signal, these pulses are computer instruction code, infrared
monitoring diode monitoring to infrared signals, The signal is then sent to the amplifier and the limiter,
which controls the pulse amplitude at a certain level, regardless of the distance between the IR transmitter
and the receiver. The AC signal enters the bandpass filter, the bandpass filter can pass the load wave of
30KHZ to 60KHZ, through the demodulation circuit and the integral circuit to enter the comparator, the
comparator outputs the high and low level, restores the signal waveform of the transmitting end. As shown
in the 4-5-3.
Picture 4-5-3 Infrared emitter and receiver system block diagram
4.5.3 Acquiring Infrared remote value
Open the program named “
Lesson\Module_Test\IrkeyPressed_Test\IrkeyPressed_Test.ino
” in
the
program is opened and downloaded to the development board, and the transparent plastic sheet labeled "1"
