Automobile risk early warning vehicle-mounted monitoring system
A vehicle-mounted monitoring system and risk warning technology, applied in transmission systems, CCTV systems, vehicle components, etc., to reduce costs, reduce static power consumption, and protect property safety.
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[0045] Such as figure 1 As shown, the U303 voltage regulator block stabilizes the battery voltage of BAT1 at 2.8V to supply power for each unit circuit of the intercom.
[0046] Such as figure 2 As shown, the switching level signals of DOUN, UP, SCAN, PTT, and CALL buttons are input to the main control chip U5 for intercom frequency selection, parameter adjustment, and call operation.
[0047] The pins of the digital tube display are connected to pins 14, 15, 16, 17, 20, 21, 22, 23, and 24 of the main control chip U5, and the transmitted data displays the parameters of the intercom, such as the intercom channel display.
[0048] Such as image 3 As shown, the main control chip U5 processes key signals, parameter display, intercom channel selection, and battery power collection and regulates the work of the entire circuit, as shown in Figure 4 As shown, the human voice signal collected by the MIC300 microphone head is amplified step by step by the U301 and restored to an a...
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