Arduino Projects

In the previous tutorial, we discussed digital output from Arduino to drive an LED. A controller can interface and interact with other devices in five ways: digital output, digital input, analog output, analog input, and serial communication.  In this tutorial, we will use digital input from Arduino to read the state of a tactile switch…

In the previous tutorial, we discussed the digital input process for using Arduino. We also explained push buttons (momentary type buttons) and how to use them for data or command input via a digital input.  Any controller can interface and interact with other electronic devices in five ways: digital output, digital input, analog output, analog input,…

In this project, we’ll design a 16-bit IO port (input-output port) library for Arduino. It’s possible to send direct 16-bit data to any Arduino board using this library. It connects any of Arduino’s 16 pins, so they work as a 16-bit IO port.  First, you must select 16 pins from Arduino to combine as the…

Proximity sensors are used to detect something approaching near. These sensors are useful in many applications like collision avoidance, obstacle detection, path following, touchless sensing, motion detection, and object detection. There are different types of proximity sensors like optical, ultrasonic, capacitive, inductive, and magnetic. The capacitive, inductive, and magnetic proximity sensors are used in specific…

Optical fingerprint scanners are prominent security devices nowadays. These scanners are low-cost and easy to use with any embedded hardware platform. The scanners have built-in memory and a controller to store and compare fingerprints. Usually, optical fingerprint scanners have a USB and/or UART port to communicate with external controllers or computers. The scanner handles enrollment…

You might have heard about USB rubber ducky. A Rubber ducky is a programmed USB HID device, often a pen drive, to send a programmed sequence of keystrokes and mouse events to a computer. It is a powerful device that can unlock a PC or login credentials by inserting a USB stick. Even a rubber…

Typical electronic voting machines require voters to push a button to cast their ballots. However, there have been security concerns with these devices and whether they’re at risk for tampering. One solution is to use biometric-based voting machines, which use fingerprint matching or a retina scan to verify an authorized voter.  In this project, we’ll…

In this project, we’ll create an 8-bit IO port Arduino library that reads and writes all eight bits in a single command by combining Arduino’s pins. This means sending and receiving the 8-bit data from a single pin will be possible. Arduino provides digital output using the digitalWrite() function and receives digital input via the…

SEGGER announces the release of the Arduino MKR Adapter, simplifying the connection of J-Link debug probes to Arduino boards from the MKR series. The adapter was originally developed for internal use to simplify SEGGER’s processes. It has since evolved into a standalone product, accessible to the broader Arduino community, eliminating the need for soldering and…

This project helps in understanding the insights of CAN protocol interfacing two different Microcontroller for example, PIC and Arduino. Controller Area Network or CAN protocol is a methodology of communication between various electronic devices like engine management systems, gear control, active suspension, ABS, lighting control, air conditioning, airbags, central locking etc. embedded in an automobile. For further learnings refer this article.

In this mini do-it-yourself (DIY) electronic project, we’ll design a multi-use level indicator that can measure multiple physical parameters like temperature, water, voltage, humidity, distance, and more. It consists of a bar-graph LED display that presents the measurements. Four main types of sensors are used to measure the different physical parameters, including the following LM35…

JSON and XML are the most common data serialization formats. The Internet is a hub of billions of different devices, applications, and services. These devices and applications are built in different programming languages and around diverse platforms. For all these entirely different devices and applications to effectively communicate with each other, data is serialized and…

IFTTT plays a significant role in the Internet of Things (IoT) ecosystem. As IoT involves the interconnection of various devices and platforms, IFTTT provides a simple and user-friendly platform for devices to integrate together and automate embedded applications. IFTTT provides a cross-platform integration of among a multitude of platforms, brands, and standards, bridging the “things”…

In this tutorial, I am going to measure DC current using Acs712 Hall Effect-Based Linear Current Sensor and arduino uno. Acs712 can measure current precisely and accurately if properly managed. I have gone through various blogs on internet about interfacing acs712 current sensor with arduino and other microcontrollers. I found that all of them are…

A majority of middle-aged people suffer from health issues like asthma and breathing problems, particularly in cities. Air pollution is the major cause of it. In this project, we have designed a portable device that detects different air pollution metrics and displays them on a small OLED screen. People with respiratory issues can use the…

A very common feature in Android and iOS fitness apps is calculating the number of steps the user walks and the distance he covers. These apps calculate the number of steps walked by the user either using GPS location and manipulating the geospatial data or by monitoring the acceleration vector of the device using an…

Metal detectors offer several useful applications. A few examples include: Security checks Positioning detection for production equipment Elevator floor control Mineral prospecting Unearthing relics and artifacts Collecting traffic statistics  Metallic waste detection  Game entertainment Each detection circuit employs different electronic components and designs. A simple metal detector can be constructed using an RLC circuit. In…

BMP180 is a digital pressure sensor designed for low-power, low-voltage operation in mobile phones, navigation devices, and personal digital assistants. The sensor has an I2C interface to communicate sensor data. It can operate on 2.5~3.6V and consumes only 12 uA even in the ultra-high-resolution mode. The sensor can be used for several applications, including measuring…

Environment sensors are of great importance in embedded applications. Many temperature sensors measure the ambient temperature or temperature of a surface. For measuring water temperature and other fluids, waterproof temperature sensors are required. One of such temperature sensors is DS18B20. This sensor can measure the temperature of the air, liquids like water, and ground. The…

When it comes to general-purpose microcontrollers, nobody expects them to perform heavy-duty software operations. Microcontrollers are simple devices that control binary devices and talk over serial interfaces. Building audio/video or multimedia applications on microcontrollers is never attempted. It is challenging and infeasible in most situations to handle any kind of multimedia through microcontrollers. Microcontrollers are…