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  • Posts Courses Resource Reference Design Circuit Articles

    1. PLC introductory information

      Programmable controller is a new and practical automatic control device that integrates computer technology, automatic control technology and communication technology.

      download times 3 type Application Documents uploaded 2014-07-11

    2. Optocoupler selection and application

      Photocouplers have strong anti-interference and isolation properties. They can be used in circuits to form logic circuits for various signals. Logic circuits designed with photocouplers have strong stability and can ensure that the transmitted signals are not distorted.

      download times 0 type Application Documents uploaded 2014-07-04

    3. Design of electronic password lock

      This design uses AT89C51 single-chip microcomputer as the control core, combined with matrix keyboard, 24C04A storage system, etc. to complete the design of electronic password lock. After receiving the typed code, the single-chip microcomputer compares it with the password stored in 24C04A. If the password is entered correctly, the lock will open; if the input is incorrect, the system will alarm, but allow the password to be entered again. Until the input is correct, the system will unlock. The design achieves the expected effect.

      download times 0 type Paper uploaded 2014-06-27

    4. CH451 source program

      The performance characteristics and working principle of a new keyboard display driver chip CH451 are introduced. The interface method between CH451 keyboard display driver chip and MCS-51 single chip microcomputer and the corresponding software driver are given.

      download times 1 type Source Code uploaded 2014-06-27

    5. Design and simulation of electronic password lock based on STC89C52 single chip microcomputer based on C language

      This paper introduces the realization process of an electronic password lock successfully simulated by Protues software. It uses the highly reliable STC89C52 single-chip microcomputer to realize unlocking and password recognition, and uses the E2PROM chip with an I2C bus interface to complete the password storage. The 1602 LCD displays the program running status and usage steps, uses a buzzer to simulate the alarm, and the light-emitting diode simulates the lock\'s switch. The system is programmed in C language, which has better portability and readability than assembly language, and is easy to modify and add or remove functions.

      download times 3 type Application Documents uploaded 2014-06-26

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