![]() Find here 10 electronics mini projects which have been made using ATMega32u4 and are very easy to build. These electronics projects are ideal for students and electronic enthusiasts or hobbyists who are looking for electronics mini projects. ATMega32u4 can be used to build easy electronic projects with simple electronics circuits. These new electronics projects aim to help electronics beginners and students of 2nd and 3rd year electronics engineering to provide an insight into the world of electronics. The great thing about these digital electronics projects is that even if the person has no interest in the theoretical knowledge behind any project and they just want a hobby or something to do which they can show for, then these projects are very easy to follow guides which does not require prior knowledge of electronics to get the desired output or desired result. However, please be advised to choose the correct component for your project. These basic electronics projects are to encourage all to learn what you can and will help you to take on bigger and better projects in the future. List of 10 ATMega32u4 Electronics Projects – Electronics for All Source for complete tutorial 1.) ATMega32u4 Based USB speaker We are all familiar with the speaker which produces sounds from electrical signal by encoding the audio. Speakers generally have 3.5mm jack for output of audio from the computer. In recent times USB interface is much more popular in interfacing audio devices with the computer. If we look around we will find many portable audio and musical devices which use USB connectors to interface with the computers. These portable audio output devices are easy to carry. The USB pluggable devices are built in such a manner so that they get charged from the USB port itself. When USB interface is used in an audio device to connect with the computer then the audio stream coming from the device must also be according to the USB protocol. A 3.5 mm audio jack has been replaced with USB interface to connect with the computer in this project. . To decode audio from the computer using USB protocol there should be a controller chip which can accept digital audio signal and to decode it for the USB protocol. This also converts the audio signal in analog electrical signal. This project makes use of a controller chip 8-bit USB AVR – ATMega32u4. The firmware used is a light weight USB Framework (LUFA). 2.) ATMega32u4 Based Wireless USB mouse This project will help you to design a wireless mouse using two circuits. The first circuit is a transmitter circuit which contains a keypad that are included for getting the user input and the second electronic circuit involved is a receiver circuit which will be connected with the computer using a USB port. These two circuits will be connected via wireless connection using NRF24lo1 module.NRF module used here is a wireless transreceiver which works on 2.4 GHz ISM band. Nordic semiconductors are the manufacturers of these bands. Arduino Mega is used as the controller board by the transmitter section. Computation at the receiver end is handled by two controller boards – Arduino UNO and Arduino Pro Micro. Generally, the USB mouse consists of optical sensors which detects the desired direction of navigation across the screen. In this project instead of using optical sensors, this project uses tactile switches for direction of cursor movements and clicks. Here, Arduino Pro Micro uses HID device driver class of LUFA framework to use as mouse which is modified to implement the project. The project works similar to any USB mouse with wireless connectivity and consists of buttons for all mouse click functions. 3.) ATMega32u4 Based USB Microphone This project uses a typical audio jack input of a regular microphone which is replaced with the USB interface to connect with the computer. To send the voice or audio stream in the computer with the USB protocol then there needs to be a controller chip which can accept analog signal so that it would be digitized and forwarded to the computer according to the USB protocols standard. The controller chip used here is a 8-bit USB AVR – ATMega 32u4. The firmware used here is the AVR based Lightweight USB Framework which accepts analog audio input and sends out USB encoded digitized audio stream. According to the USB protocols standard there are separate device classes for audio devices, the device class used here is – Audio Class 1.0. The LUFA framework contains the drivers for audio class devices and it is not necessary to write firmware code explicitly. If the firmware code is modified in order to customize the functioning of the Audio Class will be much more sufficient. 4.) ATMega32u4 Based Wireless USB Keyboard This project helps to build a wireless keyboard. To make a wireless keyboard, two circuits are required. First circuit is a transmitter circuit which consists of a keypad that is included for getting a user input. The second circuit consists of a receiver circuit which connects with the PC through USB port. The two circuits are connected wirelessly using NRF24lO1 module. The NRF module used here is a Wireless Transreceiver which works on 2.4 GHz ISM band. Nordic semiconductors are the manufacturer of these NRF modules. Arduino Mega is used as the controller at the transmitter section. Reason behind selecting Arduino Mega is that it consists of large number of GPIO pins which are available with the board. Therefore, if the projects needs to be extended then large number of keys can be interfaced with the Arduino Mega Board. The computation at the transmitter section is handled by two controller boards – Arduino UNO and Arduino Pro Micro where both of them uses AVR based Lightweight USB Framework (LUFA) as the firmware for implementing the USB protocol. 5.) Atmega 32u4 Based Virtual Serial Mouse This project will help persons to build a composite device which is Virtual Serial Mouse. The device built using this project will work as a mouse as well as an UART to USB converter. Once again, 8-bit USB AVR – ATMega32u4 is used as the controller chip in this project. The framework used is the Light weight USB Framework (LUFA) which is modified and loaded to the Arduino board to make this project. Both Communication Device Class (CDC) and Human Interface Device (HID) type interface of the USB protocol is used. These two drivers are taken from the LUFA framework. With the help of these driver classes there is no need to write codes explicitly. The CDC and HID classes are implemented using the APIs provided in the open source framework. 6.) ATMega32u4 Based UART to USB converter Through this project an UART to USB converter is designed for serial communication to use embedded devices having UART interface for the personal computers. The project device works similar to virtual serial device which means that the data packets from the host computers are received according to the USB protocol. The data packets from the embedded device are recived according to UART protocol. Here in the project device changes the protocol in between while the PC is acknowledged that it is connected to embedded device and embedded device is acknowledged that it has been connected to computer using UART interface. The controller chip used in this project is the 8-bit USB AVR – ATMega32u4. Again LUFA is used as the firmware which is modified to perform the protocol conversion. Here, the LUFA communication device class CDC has been modified to program the project. By using this device driver there is no need to write USB protocol and UART protocol explicitly. The conversion between the protocols can be done easily by using the API provided in the open source framework. 7.) ATMega32u4 Based Multimedia Volume Controller This project aims to build a multimedia volume control which can control the main volume of windows operating system. In this project instead of using tactile switches LDR sensors are used for user inputs which demonstrate a gesture recognition application. In this project also the device is configured to a consumer device instead making a generic desktop control device. This project is built with the help of LDR sensors and transistor circuits for user inputs. ATMega32u4 is used as the USB controller chip and USB cable to connect with the personal computer. The device controller chip used in the project is 8-bit USB AVR – ATMega32u4. The project uses AVR based Lightweight USB Framework (LUFA) as the firmware which is modified to work like a geature controlled volume controller. The only challenge of the project is to modify the firmware code to implement multimedia functioning with the respective operating system. The volume controller consists of four LDR sensors which are connected to the arduino board in a vertical fashion. When finger is swiped from bottom to top then the master volume of the windows operating system increases and the same is repeated vice versa when the finger is swiped down from top to bottom. 7.) ATMega32u4 Based Gamepad This project will help to build common desktop peripheral – joystick. Joystick’s are used for gaming on the desktop computers. This project explains the basic functioning of a joystick and how a USB pluggable joystick is made using the LUFA framework on Arduino platform. The device controller chip used in the project is 8-bit USB AVR – ATMega32u4. The project makes use of LUFA framework as the firmware which is further modified to make a custom joystick device. 9.) ATMega32u4 Based Password Generator This project helps to build a USB Plug and Play device which works like an automated keyboard which saves passwords from being stolen from key-loggers and from spying. The project has been built with the help of ATMega32u4 based Generic USB keyboard project which was based on making a generic USB keyboard. The project is known to be a password generator and it can store passwords and also has the capability to print passwords on the box when a single button is pressed. Here, also ATMega32u4 8-bit USB AVR is used as the USB controller chip and takes use of LUFA Framework as the firmware which has been further modified to retrieve passwords on USB. LUFA’s firmware HID device driver class for keyboards has been modified to program the project. The firmware in this project has been modified in such a way so that it pre stores the password and automates the process of typing. The device has the capability to work with all desktop and mobile operating systems and applications. It can be used with all browsers. 10.) ATMega32u4 Based Digital Business Card This project is a digital version of the business cards which relays business related information digitally on a computer screen or a browser. The project designs a USB Plug and Play device which is able to print business card information on any text editor. A text editor can be a desktop application or a textbox on the browser which is simply a button away. The project is known to be a digital business card which operates on a single button. The button when pressed pre stores business information which is then relayed to the computer or to any computing device. This project also utilizes 8-bit USB AVR-ATMega32u4 as the USB controller chip and uses AVR based LUFA firmware which has been modified to transfer the business information on USB. |