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Counter Sensor 4 Digit

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The counter sensor majority apply in industry or factory. Example counting commodity or counting a car in/out of parking. This project we will create counter system for apply. First of all see feature as below.

Feature

Display 4 Digit 0000-9999
Can be Count UP or Count DOWN

Hardware
This counter Sensor consist of 3 Section as follows 1.Detect Object (Sensor) Data Processing (CPU) and Display for sensor final section Display by 7-Segment.

1.Detect Object (Sensor) : we choose Optical Sensor H21A1 (Phototransistor Optical Interrupter Switch).
2.Data Processing (CPU) : for this project we choose microcontroller AT89C1051 of ATMEL Product
3.Display : for final section Display by 7-Segment.

Software
The Programming can be explain by flowchart figure 2

Figure 2. Flowchart for Programming

Data Support
Download Source Code
Source Code for Counter Sensor 4 Digit

Data Sheet Optical H21A1
Phototransistor Optical Interrupter Switch

Data Sheet AT89C1051
CMOS 8-bit microcomputer with1K byte of Flash programmable