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


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

GSM based home security

In this project, we are developing a passive infrared (PIR) sensor and GSM based home security system. PIR sensors are used to detect living being movement. This project is developed using 8051 microcontrollers. It can be used to detect any intrusion in houses and offices with options of sending alerts on cell phones. Let us know how to develop this system, step by step.

This project is available at: GSM based security

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

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

Microcontroller Projects: Locks


Digital Code Lock

Security is a major concern in our day to day life, and digital locks have become an important part of these security systems. Today there are digital locks operable from smart phones. This project explains a simple electronic code lock using 8051 microcontrollers. It can only be unlocked by a predefined code. The system alerts by sounding the buzzer on entering incorrect password.

This project is available at: Digital code lock

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

Microcontroller Projects: Robotics


Cell Phone Controlled Robot

In this project, we are going to build a cell phone controlled robot using 8051 microcontrollers. Cell phone controlled robot runs over mobile DTMF technology. DTMF stands for Dual Tone Multiple Frequency. There are some frequencies that we use to create DTMF tones. In simple words by adding or mixing two or more frequencies we generate DTMF tone.

This project is available at: Controlling Robot via cell phone

Edge Avoider Robot

An edge avoider robot is quite similar a line follower robot. In these types of robots, we generally use behaviour of light at black and white surface. A white surface reflects almost all the light, whereas black surface absorbs most of it. This behaviour of light is used in a line follower robot as well as edge avoider robot. This 8051-microcontroller based robot detects an edge and avoids it by turning or stopping. Let us see how can we design an edge avoider robot easily.

This project is available at: Edge avoiding 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

Automatic Railway Gate Controller

At present, a gate keeper manually opens or closes railway gates. The nearby station informs the gatekeeper of the arrival of the train. However, some railway crossings are totally unmanned. The possibility of railway accidents occurring at these unmanned level crossings is high. One way to avoid accidents would be to automate this process. This project deals with an interesting manner of automating the railway gate control. The gate automatically opens or closes by detecting the arrival or departure of the train.

This project is available at: Automatic Railway Gate Controller

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.