Top Microcontroller based Mini Projects for 3rd and 4th Year Engineering Students

The microcontroller is a small and self-contained computer on-chip that can be used to build several low-cost and less-complex projects. As the microcontroller based mini projects are of low cost and can be implemented in less period, most of the students prefer this controller-based mini-projects to improve their knowledge with innovative ideas.

A Microcontroller is built internally with some special functional features and is programmed by using Embedded C language. These controller projects are implemented in different categories such as embedded electronics, robotics, electrical and instrumentation. This article presents some microcontroller-based mini projects with or without circuit diagrams for a wide variety of applications.

Microcontroller based Mini Projects with Circuit Diagrams

Password-Based Digital Locking System Using Microcontroller

This project demonstrates a password-based locking system using a microcontroller. In this password-based locking system, if a wrong password is entered, then the microcontroller doesn’t allow the user to access the appliance or any other system.

The power supply circuit provides the power to the whole circuit by rectifying, filtering and regulating the mains AC supply to the circuit operating range. The microcontroller is programmed with a predefined password in the Keil software using embedded C language. A Matrix keypad and LCD are interfaced with the microcontroller for entering the password and for displaying the authentication information, respectively.

When a user enters the password from the keypad, it sends that code to the microcontroller wherein the code is compared with the predefined one. If the password matches, then the LED by giving indications displays the information as “Password Matched” on the LCD, or else it shows “Password Mismatched”. This password can also be modified by changing the code of the microcontroller.

This is one of the microcontroller-based mini-projects useful for third-year students, and this project can be further implemented by using RFID technology as an extension for the fourth year.

Traffic Light System Controller using Microcontroller

Traffic congestion is a major problem in cities. Due to this heavy traffic, routine commuters often get delayed for their day-to-day activities, and as a result, the productivity of the workers, their timings and routine work schedules get affected. Particularly for the travelers and tourists traveling thus become a menace, and thus affects their activities as well. To overcome this traffic-related congestion, the implementation of a microcontroller-based mini project on the traffic signal light system controller is being discussed here. This particular system is designed to reduce the demand for vehicle use and to improve mobility and safety.

The project is developed to meet the requirements of a solid-state traffic light controller by using a microcontroller as the main controlling element, and LEDs for indication purpose. The microcontroller is programmed such that the time and phrase are adjusted and displayed using a seven-segment LED display.

In the above circuit, a seven-segment display is used as a counter display, and three LEDs are used for traffic light operation. A Microcontroller is the brain of this entire project and is used to initiate the traffic signal at the junction. This circuit makes use of a crystal oscillator for generating clock frequency pulses. The LEDs are connected to the Port zero of the microcontroller and are powered with a 5v battery supply. The seven-segment display is connected to the port2 of the microcontroller with a common anode configuration.

The LEDs get automatically switched on and off by making the corresponding port pin of the microcontroller high, which is set while programming the microcontroller. At a particular instant of time, only the green light holds and the other lights remain off, and after some time, the changeover from green to red takes place succeeding the yellow LED to glow. This process continues as a cycle and the timing for changing the LEDs can be displayed with the help of a seven-segment LED display.

This project can also be further implemented as a final-year project by developing a traffic light controller system in four ways of the road.

These are the two simple mini projects with circuits. You can also get further ideas about the mini-projects from the below 8051 based mini-projects’ list.

Microcontroller Based on Mini Projects’ List

1. Control of an Electrical Device with Triac and Optically Isolated Diac Using IR Remote
2. Implementation of a Digital Real-Time Clock with a Microcontroller and LCD
3. Industrial Wireless Device Control System Using RF
4. Advanced Automatic City Street Control System Using Microcontroller
5. Bluetooth Technology-Based Industrial Security System Using Android Mobile
6. Over Speed Alert System Using GPS Speedo Meter
7. Real-Time Child Monitoring and Alarm System Using Radio Frequency
8. Indication System of Train/Bus Station with LCD Display Using GPS
9. Security Access Control System Using Microcontroller
10. PIR Sensor Based Real-Time Burglar Alarm System
11. Digital over Voltage Protection System for Industrial Loads with Microcontroller
12. GSM Based Cell Phone Tower Base Station Safety System
13. Industrial Fault Monitoring Detection System Using GSM
14. GSM Based Toxic Gas Detection
15. Illumination of Automatic Lamp Controller with High Power/Intensity LED Lighting using Light Dependent Resistor
16. Digital Alpha-numeric Scrolling Message Display Using Microcontroller
17. Industrial Device Control System Using Embedded Real-Time Clock
18. PC Based High Voltage Fuse Blown Indicator with Display
19. Overflow Indicator of the Garbage and Waste Collection Bins using GSM
20. Fault Detection System of Power Transformer Parameter Using GSM
21. 8051 Microcontroller Based Weather Monitoring System
22. DTMF Telephone Line Based Home Automation Control System
23. GSM Technique Based Car Black Box Using Microcontroller
24. High Precision Temperature Indicator Using DS 1820
25. RFID Based Stop Arrival Indicating System with Rolling Display for Bus
26. Smart Card Based Hotel and Lodging Management System Using Microcontroller
27. Real-time Elevator Control System Using Microcontroller
28. Microcontroller Based Multi-Pattern Running Lights
29. Monitoring and Control System of Automatic Irrigation Water Supply
30. GSM Based Advanced Automatic Vehicle Crash Notification
31. Mobile Phones Based Real-Time Industrial Process Control and Monitoring
32. Automatic Gun Control System and Surveillance Target Acquisition
33. RF Based Wireless Accident Indication via Vibration Sensors
34. Digital Card Dash Board with Data Recording Facility Using Microcontroller
35. Monitoring and Low Voltage Alert System of Real-Time Car Battery
36. Geographical Location Identification System with Microcontroller and GPS
37. Microcontroller Based Two Channel Digital Frequency Meters
38. Power Saving System in Corporate Road Ways with Time
39. Microcontroller Based Standalone Secured Money Transfer From Account to Account
40. Fire Monitoring System in Petro-Mechanical Industries Using Microcontroller
41. Automobile Exhaust Gas Pollution Checking With Zigbee Application
42. PIC Microcontroller Based Density Traffic Signal System
43. Infrared Sensor-Based Car Parking Guard Circuit
44. GSM Based Green House Monitoring System
45. Zigbee Communication Based Inter-Vehicle Communication System
46. RFID Based Automated Traffic and Parking Management System
47. GSM and RFID Based Acoustic Camera Positioning With Pan Zoom
48. GSM and GPS Based Wild Life Monitoring and Location Indicators For Visitors
49. Designing of Real-Time Medical Monitoring System on Intra-Body Communication
50. Wheel Chair Control through Eyeball for Physically Handicapped Person
51. Generation of Electrical Power Using Foot Steps
52. Intelligent Glass Breaker Detector Using Microcontroller
53. IR Communication Based Modern House Automation (AC/DC)
54. GSM and GPS Based Accident Messaging System
55. Finger Print Identification Security System Using Biometrics
56. Driving License Management System by Finger Print Authentication
57. RF Module Based Wireless Motor Speed Controller
58. Wireless Sensor Network for Sewage Monitoring Using Zigbee
59. Heartbeat Monitoring System with Pacemaker Using Radio Frequency Techniques
60. Zigbee Based Wireless Surveillance and Safety System for Mine Workers

These are all microcontroller based mini projects for ECE students. The list given here provides the best of the lot list of projects for third and final year engineering students. We hope that this is the best list you got from us through this article and further anticipate any technical help from you while you implement these projects. For any queries, assistance, and comments, you can comment in the commenting section given below.

Photo Credits

• Digital lock system by digitaldoorlocks
• Traffic light system by wineyard
• Password based digital locking system by blogspot
• Traffic light system controller by blogspot