Power-saving entrance machine
A door station and circuit technology, applied in non-electrical signal transmission system, single input port/output port register, signal transmission system, etc., can solve problems such as impact on the life of the display screen, waste of energy, etc., to prolong the service life, Ease of use and energy-saving effects
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[0019] see figure 1 , the outdoor station includes an integrated circuit board, a power module, and an LED display circuit. The integrated circuit board is equipped with an infrared proximity sensing circuit, and the infrared proximity sensing circuit is divided into an infrared sending end and an infrared receiving end. The infrared sending end includes a sending single-chip microcomputer and an infrared emitting tube. The sending single-chip microcomputer encodes and modulates the binary signal to be sent into a series of pulse train signals, and emits the infrared signal through the infrared emitting tube. The modulation of the binary signal is still completed by the sending microcontroller, which modulates the compiled binary signal into an intermittent pulse train with a frequency of 38KHz, which is the signal sent by the infrared emitting diode after modulation.
[0020] The infrared receiving end includes an infrared receiving head and a receiving single-chip microcompu...
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