The Patient Counter is a simple and reliable electronic counting module that displays values from 000 to 999 using three bright 7-segment LED displays. Designed around CD4033BE decade counter ICs and a ULN2803A driver, this circuit provides accurate counting with safe current handling.
This counter is suitable for both educational purposes and real-world applications such as patient counters, queue management systems, visitor tracking, and event tallying.

Specifications:

• Circuit type: 3-Digit digital counter
• Display type: 7-segment LED (Common Anode)
• Display range: 000 – 999
• Counter IC: CD4033BE
• Driver IC: ULN2803A
• Input control: Manual push-button count and reset
• Operating Voltage: 3V – 5V logic supply
• Display Voltage: 3V – 5V (higher voltage supported via driver)
• Skill Level: Beginner-friendly

Key Features:

• Displays count values from 000 to 999 using three 7-segment LEDs
• Manual push-button counting for easy operation and learning
• Reset button to instantly clear the count to zero
• ULN2803A driver stage for safe current amplification and display protection
• Designed for Common Anode (CA) 7-segment displays
• Includes current-limiting resistors to protect LED segments
• Ideal for learning digital counters and display interfacing concepts

User Guide: Click here

If you have any issues, please contact the manufacturer directly at [email protected].