Design of infrared counter based on 51 microcontroller

1. System Overview

The modules used in the system include AT89C51 microcontroller + LCD1602 display screen + photoelectric switch + button + small light + buzzer.

This design uses 51 microcontroller as the core control, and uses LCD1602 to display numerical values. The photoelectric switch of the system controls the addition and subtraction of numerical values. When the photoelectric switch that controls the numerical addition scans an object, the value on the display screen will increase by 1. When the control When the value-decreasing photoelectric switch scans an object, the value on the display screen will be reduced by 1. The system can also set an alarm threshold. The buttons control the size of the threshold. When the value reaches the threshold, an alarm will be issued.

2. Simulation Overview

1. Use LCD1602 to display real-time threshold and numerical transformation.

2. The photoelectric switch that controls the numerical increase scans the object and the numerical value increases.

3. The photoelectric switch that controls the numerical reduction scans the object and the numerical value decreases.

4. Set the threshold by pressing the buttons. Click the setting button and then press the plus and minus buttons to set the threshold.

5. When the value reaches the threshold, an alarm will be issued through the LED and buzzer.

3. Programming

Use Keil 51 for programming. When you open Proteus, the program is burned by default. If it is not burned, click on the AT89C51 microcontroller and import the program to run the system (the program file is a file with the suffix hex).