Top Microcontroller Projects | Microcontroller Project Ideas

The role of a microcontroller in the life of a design engineer is immense. These provide integrated solutions for engineers incorporating multiple peripherals along with the much-needed processor in a small sized module. You might have one lying in your electronics spare parts box. Let’s put them to good use with some microcontroller projects. This list of top 20 microcontroller project ideas might come in handy if you plan on something.

Microcontroller Projects: Wireless systems

ATmega16A Based GPS Receiver

A global positioning system (GPS) receiver uses information from the satellites to get precise geographical location. It not only gives information about location but also information like time, date, height and speed. The project here demonstrates how to get location (latitude and longitude), time, date, speed and course-angle information using a GPS receiver. It uses 8-bit AVR microcontroller (MCU) ATmega16A to get data from the GPS receiver.

This project is available at: ATmega16A Based GPS Receiver

GPS- and GSM-Based Vehicle Tracking System

Presented here is a GPS based vehicle tracking system based on the ATMega16 microcontroller using global positioning system (GPS) and global system for mobile communication (GSM).

This project is available at: GPS- and GSM-Based Vehicle Tracking System

Ultrasonic Radar

Radar systems have several defence as well as civil applications. A transmitter, transmits a beam towards the target. This is reflected by the target as an echo signal. The reflected signal is received by a receiver. This receiver processes the received signal and provides information about the presence of a target, distance, position (moving or stationary) or speed. This is displayed on a display unit.

This project is available at: Ultrasonic Radar

Interface GSM Module

GSM is widely used mobile communication architecture used in most of the countries. This project demonstrates the interfacing of micro controller AT89C51 with Hyper Terminal and GSM module. It aims to familiarize with the syntax of AT Commands and their Information Response and Result Codes. The ASCII values of characters in the Information Response, Result Codes and their syntax can be monitored by an LED array.

This project is available at: Interface GSM Module

Arduino Based GSM Home Security System

This project is designed using normally-closed reed switches connected to doors and windows and additional passive infrared (PIR) motion sensors to detect movement of a burglar or an unwanted intruder in your home.

This project is available at: Arduino Based GSM Home Security System

Microcontroller Projects: Locks

Electronic Card Lock

This next project presents a circuit for an electronic lock. A rectangular card is inserted like a CD, inside the disk drive. An appliance is switched on depending on the positions of the holes in the card. The electronic lock is connected to an access control system to prevents false operation of the system. It ensures the switching “ON” of only the selected appliance.

This project is available at: Electronic Card Lock

Morse code encoder

Morse code is a method of transmitting textual information as a series of on-off tones, lights or clicks. The International Morse Code encodes alphabets, numerals and a small set of punctuation and procedural signals as standardised sequences of short and long signals called ‘dots’ and ‘dashes,’ respectively. The Morse code encoder presented here converts texts, numbers and special characters into Morse code as audible output on a piezo buzzer.

This project is available at: Morse code encoder

Smart Receptionist With Smartlock System

Presented here is a security system that lets you see a visitor whileyour main office door is locked. If you are in the middle of a meeting in a conference room and there is a visitor at the door, this system will send a notification to your smartphone with a photo of the visitor as email. If you approve, you either use your mobile or PC to unlock the front door using a Web browser.

This project is available at: Smart Receptionist With Smartlock System

Microcontroller Projects: Robotics

Virtual Telepresence Robot Using Raspberry Pi

This robot with a camera is placed in a remote location to capture the environment in visual form using Raspberry Pi (RPi). The captured visuals are displayed on the user’s virtual reality (VR) headset.

This project is available at: Virtual Telepresence Robot Using Raspberry Pi

Soccer Robot

This soccer robot can move forward, reverse, forward-left, forward-right, reverse-left and reverse-right with the help of an Android phone. The speed of its movement is controlled by the angle of rotation of the phone. The robot also kicks a ball when the phone is shaken.

This project is available at: Soccer Robot

Microcontroller Projects: Smart Living

Restaurant menu ordering system

In these modern days, the number of restaurants are increasing. They also require very fast processing for serving food to the customers. With the increasing number of customers, it would require more manpower, since the current situation has become hectic for the restaurants. Also, changes in the hardcopy of the menu can’t happen.

This project is available at: Restaurant menu ordering system

Fridge Temperature and Humidity Indicator

We can measure temperature and humidity inside the fridge using a normal temperature-humidity indicator but relative humidity (RH) could be inaccurate in that case. The moment the fridge door is opened, RH will shoot up due to ingress or egress of moisture in the surroundings. The small sniffer device, described in this project, picks up temperature and humidity from inside the fridge and transmits on an RF link to a nearby receiver unit. The receiver unit checks the received code, identifies the right sniffer device and displays live temperature and humidity.

This project is available at: Fridge Temperature and Humidity Indicator

Home Automation System

We are surrounded by smart devices capable of making decisions with minimal human intervention. Our home can also be made smart by implementing real-time home automation systems. It monitors parameters like power consumption and human presence. Home automation may include centralised control of electrical devices including lightings, appliances and security. Presented here is a touch-control based home automation system that can control up to six electrical devices. It also has a separate keyboard interface module for troubleshooting and system settings.

This project is available at: Home Automation System

LPG Leakage Detector

Presented here is a low-cost circuit for an LPG detector that you can build easily. The main objective of the circuit is to detect LPG leakage anywhere. It is very easy to find gas leakages with this circuit, which uses low-cost components and an interactive way to adjust different sensitivity levels, based on customer needs, with the help of pot meter.

This project is available at: LPG Leakage Detector

Solar Tracker System

Solar energy is coming up as a major source of energy. The need of the hour is renewable energy resources with cheap running costs. With the current systems for solar energy harvesting, we have high production only at fixed times mostly noon. This project proposes a dual axis solar tracker system that increases the productivity by a significant margin.

This project is available at: Solar Tracker

Microcontroller Projects: Lighting

Display Custom Animations

Animating custom made characters on a 16×2 LCD screen can be very exciting. (Also, see LCD custom characters.) This topic explains the principle and operation of a displaying animation on LCD using Microcontroller AT89C51. There’s a useful side effect to the way the LCD controller uses CG RAM. Normally, we define a pattern in CG RAM, and then print the character. But it is also possible to change the CG RAM for characters that are already on the screen, and their appearance will change

This project is available at: Display Custom Animations

Auto Intensity Control of Street Lights

Street lights are controlled manually in olden days. These days’ automation of street lights has emerged. But one can observe that there is no need of high intensity in peak hours i.e. when there is no traffic and even in early mornings. By reducing the intensity in these times, energy can be saved to some extent. The project proposes circuits that control street light intensity by calculating the peak hours.

This project is available at: Auto Intensity Control of Street Lights

Microcontroller Projects: Miscellaneous


This next project describes how to build a digital speedometer-cum-odometer for your motorbike. The circuit uses a microcontroller, an LCD display and some commonly available components. It is a better alternative to the mechanical speedometer and even a beginner with minimal skill level can assemble it.

This project is available at: Odometer

Microcontroller-Based Tachometer

A tachometer is nothing but a simple electronic digital transducer. Normally, it is used for measuring the speed of a rotating shaft. The number of revolutions per minute (rpm) is valuable information for understanding any rotational system. This easy-to-make photoelectric tachometer measures the rpm of most shop-floor tools and many household machines without any mechanical or electrical interface.

This project is available at: Microcontroller-Based Tachometer

Interfacing Humidity Sensor

Various sensors are used to measure physical quantities in analogue form like pressure and temperature. This article demonstrates the principle and operation of interfacing the humidity sensor with 8051 microcontroller (AT89C51). A humidity sensor is widely used in applications like weather forecast, air conditioner, Hygrometers etc.

This project is available at: Interfacing humidity sensor

This is in no way an exhaustive list. New ideas keep coming up from time to time. If you have any such microcontroller projects, we would welcome it through the contacts email.

The article was first published on 25 April 2017 and was updated on 16 April 2021.