Project Idea
Automated Stop and Go Queue Entry Manager System using STM32 microcontroller and ultrasonic sensor for efficient and automated queue management without manual intervention.
Project Description
This system automates queue management by displaying stop and go signals using an LED display controlled by an STM32 microcontroller. It detects persons using an ultrasonic sensor and allows an admin to control the queue flow via a keypad. When the admin presses the "Go" button, the system shows a green "GO" indicator and activates the ultrasonic sensor to detect a single person passing through. Once detected, the system displays a red "STOP" signal to halt the next person until the admin presses "Go" again. This technology reduces the need for manual queue controllers, ensuring orderly and efficient queue management at places like passport offices, malls, or security checks.
Total List of Components
STM32 Controller
Ultrasonic Sensor
Keypad
LED Panel / LED Module (Red + Green indicators)
Buzzer
Transformer
Voltage Regulator Circuit
Switches
LEDs (Red and Green)
PCB Board
Resistors
Capacitors
Transistors
Cables and Connectors
Features
Automatic person detection with ultrasonic sensor
LED display indicating stop (red) and go (green) signals
Buzzer for audible alerts
Keypad interface for admin operation
Efficient queue management without a dedicated staff member
Compact and reliable STM32-based controller design
Applications
Passport offices
Shopping malls
Security checkpoints
Bank counters
Any slow-moving queues requiring orderly management
Project Includes:
Fully assembled and tested circuit
Circuit diagram
Source code
(For DIY KITs - only the components will be provided)
Project Types:
- DIY KIT(Do IT YourSelf KIT) - We are providing only components in this kit for this project
- DIY KIT with Code & Circuit Connections - Along with the components, you will get the Code and the Circuit Connections file to help you build the project easily.
- Readymade Breadboard - We are providing fully assembled, tested and ready-made project using plug-n-play jumper wires and breadboard with all the other components, code & circuit diagram.
- Readymade Soldered - We are providing fully assembled, tested and ready-made project soldered on a PCB with all the other components, code & circuit diagram.
Shipping Dimensions (in cm)
Package size: 20 x 15 x 10 cm
Weight
Estimated project weight: around 1 kg (including PCB, components, casing)
Notes: All the products are made by LearnElectronics India and not for re-sale. If you want to order a product, please reach out to us at +91-7600948607.

