| 摘要 |
<p>Disclosed is an intelligent lectern, comprising a housing, a main control unit mounted in the housing, a power supply electrically connected to the main control unit, a display screen, an LED lamp, a loudspeaker, a human body infrared sensor, a photosensitive sensor, a keyboard and an infrared receiver. The main control unit comprises a central processing unit, and a power supply processing circuit, a multimedia play and display circuit, a light flashing control circuit, a human body sensing circuit, a light sensor circuit and a keyboard scanning circuit that are electrically connected to the central processing unit. The present invention is capable of playing music according to a preset time, and may set that when the human body infrared sensor detects that a person is approaching, the central processing unit controls the multimedia play and display circuit to play music, and meanwhile, when the photosensitive sensor detects that the ambience is getting dark, the central processing unit controls the light flashing control circuit to switch to an LED pulse width modulation (PWM) manner to control the luminance of the LED lamp according to the strength of the music.</p> |
