Home long-distance management device
A technology of remote management device and main controller, which is applied in the direction of data exchange, electrical components, telephone communication, etc. through path configuration, which can solve the problems of complex system structure, limited operating distance, high cost, etc., and achieve cost reduction and reduction Development cost, effect of increasing cost
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specific Embodiment approach 1
[0041] Main controller circuit composition:
[0042] The programmable logic IC is selected as AT89C52 of ATMEL Company, which has a wide range of applications and contains multiple I / O ports. It is a high-performance single-chip microcomputer suitable for this system. The application circuit of AT89C52 is shown in Figure 6.
[0043]This circuit contains the minimum application system of AT89C52, including: reset circuit (peripheral circuit connected to pin 9), oscillation circuit (peripheral circuit connected to pin 19 and 18), power supply (pin 40 connected to VCC (5V), pin 20 ground (not marked in the figure)). In addition, the P0 port (pins 32 to 39) of AT89C52 is connected to the data port of CH375. Connect pin 21 of AT89C52 to pin 8 of CH375 (circuit diagram 7) as an address line. Pins 17, 16, 22, and 12 of AT89C52 are respectively connected to pins 4, 3, 27, and 1 of CH375 as control lines. Port P1 (pins 1 to 8) and port P2 (pins 21 to 28) serve as I / O ports. By pro...
specific Embodiment approach 2
[0057] On the basis of Scheme 1, modify the security inspection subsystem to obtain Scheme 2.
[0058] In scheme two, the security inspection subsystem is still composed of a password proofreader, an electronic key and a door open detector. But the specific implementation is different. The password proofreader adopts programmable IC-AT89C52, and there are corresponding programs in it. The electronic key adopts a common USB flash drive, and the door open detector adopts a proximity Hall switch. AT89C52 adopts the same circuit connection method as AT89C52 in the main controller in the specific implementation plan 1 to establish a USB interface, so it will not be repeated here. In addition, pin 1 of AT89C52 is connected to the output of the Hall sensor. The hall sensor sets pin 1 high when the door is closed and the hall sensor sets pin 1 low when the door is open. Get the state of the gate by judging the level of pin 1. Pins 10 and 11 of AT89C52 are respectively connected t...
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