This paper introduces a timing and scoring system for ball games, which is programmed by AT89C5 1 and controlled by led seven-segment digital tube. This system has the functions of schedule setting, schedule suspension, timely updating of the results of both parties and temporary storage of the results after the game. It has the characteristics of low price, stable performance, convenient operation and easy carrying. It is widely used in all kinds of schools and small groups as time grading of curriculum.

Keywords: AT89C51; LED seven-segment digital tube; CD4094 scoring circuit; Timing circuit of basketball game timing and scoring device Abstract: This design introduces a game timing and scoring system displayed by LED display screen. AT89C5 1 vensegmert digital tube controlled and programmed. The system has many functions: set the schedule regularly, set the pause time, refresh the points of team A and team B in time, and temporarily store the results after the game. The system has the characteristics of low price, stable performance, easy operation and portability. It is widely used in various types of schools and small groups for timing and scoring in competitions. Keywords: AT89C51; LED seven-segment digital tube; CD4094 scoring circuit; Timing circuit catalogue

Abstract 1

Abstract 1

1 Introduction 1

2 system design scheme 1

2. 1 system block diagram 1

2.2 Equipment Selection 2

3. Introduction to basic functions 2

3. 1 scheduled time setting 2

3.2 Planned Start/Stop Settings 2

3.3 Score Exchange Control 2

3.4 Fractional refresh control 2

3.5 Score Time Display 3

3.6 Game End Alarm 3

4. Composition of system hardware circuit 3

4. 1 timing circuit 3

4. 1. 1 display and its interface 3

4.2 Alarm 5

4.3 Schematic diagram of timing circuit 5

4.4 Working principle of timing circuit 5

4.5 Scoring Circuit 5

4.5. 1 serial interface 6

4.5.2 Schematic Diagram of Scoring Circuit 9

4.5.3 Working principle of scoring circuit 10

5. Work flow of timing and scoring device for ball games 1 1

6. 1 1 Software Design of Single Chip Microcomputer

6. 1 program flow chart of basketball timekeeper 1 1

5 references 12

Conclusion: 13

Thank you 14

Appendix 1: Circuit Schematic Diagram 15

Appendix II: Basketball Timekeeper Program Source Code 16 The above answers come from:/html/42-5/5233.htm.