Hall sensors are sensors which produces an electrical signal at its output when it comes in contact with a magnetic field. The analog value of the electric signal at the output of the sensor is a function of the strength of the magnetic field. Hall sensors are everywhere these days, they are being used for different reasons and in all kind of devices from mobile phones to switches, for the measurement of speed, position and distance in cars and in other automotive industry based products.

Just like the craze for Pokémon Go out of nowhere the fidget spinners got popular and it became more of trend to have one of these spinning between your fingers. But lately people (including me) eventually got bored of it and hence in this project let us bring in a new purpose for fidget spinner by building a simple motor using Fidget Spinner. With this circuit you will be able to make the fidget spinner rotate forever with the help of basic physics and not worry about having it idle at some corner of your room.

Door alarm is a very common and useful device for security purpose. They are used to detect whether the Door is open or closed. Often we have seen some door alarm in the refrigerator that produced a different sound when they activate.  Door Alarm Projects are very popular among the Electronics students and hobbyists. We have also built many alarms based on various technologies:

Sensors have always been a vital component in any Project. These are the ones which convert the real real-time environmental data into digital/variable data so that it can be processed by electronics. There are many different types of sensors available in the market and you can select one based on your requirements. In this project we will learn how to use a Hall sensor a.k.a Hall effect sensor with Arduino.

Measuring the speed/rpm of a Vehicle or a motor has always been a fascinating project for us to try. So, in this project we are going to build one using the Industrial ready PIC microcontrollers. We will use a piece of magnet and a Hall Sensor to measure the speed. There are other ways/sensors to measure the speed but, using a hall sensor is cheap and also can be used on any type of motor/Vehicle.

This is a very interesting project in which we are going to learn how to implement virtual reality using Arduino and Processing. For most of us, the movie Iron man by Jon Favreau has always been an inspiration to build new things that will make our life easy and more fun. I have personally admired the Techs that are shown in the movie and have always wanted to build something similar to that.

In this project we make a Cool Speedometer for bikes or any automotives by using Arduino which broadcast the speed using Bluetooth to an Android application that we created using Processing. The complete project is powered by an 18650 Lithium cell and hence highly portable along with your vehicle. To spice it up a bit more I have added the option of charging your mobile phone as it displays your speed. Yes, you can also use this as a power bank for your mobiles on the go as the 18650 has high charge density and can easily be charged and discharged.