Arduino

Much like the name suggests, DC motor controllers control the speed and direction of a DC motor. To change the direction of the motor, however, the supply it receives must be reversed. And, to vary the DC motor speed, a pulse-width modulation (PWM) signal or wave must be applied to it.  As the pulse width…

In the previous article of this series, we learned how to change colors in RGB LED strip using any IR remote means generating different colors in RGB LED strip with your fingertips from a remote place using any IR remote. So indeed, it was a very nice application. This time again, we are moving one…

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…

In this tutorial, we will learn how to hack a TV (television) remote using Arduino. TV remote communicates with TV using infrared rays. Encoded commands and transmitted by remote, TV internal circuitry decodes them and performs an action on received commands. On the front of the remote, we have an IR led which emits IR…

This is a very nice and interesting robotic project. As the name suggests, “object follower robot” – the robot is meant for following an object. You might have heard of… A smart luggage trolley at railway station/bus station/Airport that automatically moves on battery and motor and it follows the owner A smart cart at any…

The idea of noninvasive current measurement is not new. Commercial devices are available which can measure current without any physical contact. However, the topic was not popular among the DIY community because of the complexity and nonexistence of the compact non-invasive sensors, which could be studied at low power. Luckily, we have small and reliable…

Have you ever struggled to fix nails on a wall perfectly parallel to the floor or ceiling? In this project, we have modeled an electronic-level device useful in placing anything perfectly parallel. This device is prototyped on the popular microcontroller board – the Arduino. It uses very few components to build, only an accelerometer sensor…

You must have noticed token display boards at many places like food stores, hospitals, banks, various takeaways, etc. Token display systems are used to display token numbers. As these display boards show numeric information, these are easily designed using 7-segment LEDs. The commercial models use large 7-segment LEDs to display token numbers. It is even…

BME680 is a multi-purpose digital sensor, developed by Bosch after years of research, which can measure temperature, humidity, gas, and barometric pressure. Communication with this sensor is possible via the Serial Peripheral Interface (SPI) and I2C protocols. The temperature and barometric pressure accuracy are +-1 and the humidity is +-3. The gases are measured as…

This tutorial is about building a DIY audio player using Arduino. Today audio players can commonly be found across many electronic products. Almost every mobile has an audio player. Audio technology gets a drastic improvement with rapid development in silicon technology. Previously audio data was stored on tape devices and CDs. But now, Flash memories…

Have you ever had issues with electromagnetic interference (EMI)? Well now you can track down the source with this simple DIY, which lets you make your EMI detector using an Arduino. Now you can hunt for the culprit without spending a lot of money.

RGB LED strips are nowadays used everywhere in decorative lighting. They are used in different functions like birthday celebrations, marriage, reception, parties, etc. They are also used for decoration in festivals like DIWALI, CHRISTMAS, etc. Even modern houses, luxurious flats, restaurants, and hotels use RGB LED strips for illumination and decoration. The decoration using these…

In this tutorial, we will learn how to interface EMG (electromyography) sensor with Arduino. Electromyography is the study of muscles, particularly in the electrical domain. Measuring the electrical signals generated by stretching and contracting muscles. We will use Myoware(by Advancer technologies) EMG sensor in this tutorial. Advancer Technology is a startup whose main area of…

This tutorial is about interfacing color sensors with Arduino. We will design an autonomous patient movement system in hospitals. The color sensor which I am going to use in the project is Adafruit TCS34725. Adafruit provided predefined Arduino libraries for this sensor. It consumes 3.3v to 5v and outputs data on the I2C interface. Color…

This tutorial is about using a biometric sensor with Arduino for security purposes. The biometric domain includes all the human attributes which could distinguish each individual from the other, such as fingerprint mapping, eye retina scan, and facial recognition. Fingerprint sensors are a common and cheap solution to add a biometric authentication layer to any…

A decade ago, 2D and 3D accelerometers were commonly used in devices to provide the direction, speed, and GPS localization of an object. An accelerometer is an electronic sensor that measures the acceleration forces acting on an object, typically to determine its position in space and monitor the object’s movement. Since then, the 3D field…

Container shipping is a common transport medium. In fact, 80 percent of international trade in goods is carried by sea. Containers are large and reliable, offering a standard size that makes them portable between ships, trains, and trucks.  However, the loss of items transported via containers is not an uncommon problem in the shipping industry.…

RGB-LED is widely used to generate different colour Lights in Interior Decoration, Electronic Appliances, Automobiles, etc.This article deals with Arduino to get various colours with RGB LED and show the transition from one colour to another. 

Stadium lights consume a lot of electricity. They are high beam lights with high wattage rating. A lot of electricity can be saved by controlling the intensity of these lights manually or automatically. For controlling the intensity of light, the voltage supply to the lights need to be controlled. This project is a demonstration of…

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…