Arduino Based Dual LED Desk Light Controller

The DIY started with the desire to build a switchless control for LEDs to radiate working space. Synaptics when used with arduino can give amazing results for the case. It works in two modes.  In Relative mode it works like it works on a laptop - the mouse pointer will traverse from its present location in the direction of the finger. Since there are no mouse or laptop for this DIY, the Synapses will be used in the Absolute mode.  The user should know the exact X/Y coordinates of where the fingers are going to move to and so the user can map areas to the monitor in the arduino Sketch. When movements are detected in those mapped areas, commands can be given and any number of tasks can be performed.

Robo Car Control over WiFi

Contributor: 

Ganesh Selvaraj

ESP 8266 is the latest buzz on internet. It is a WiFi module which is just a bit larger than a 1 Re coin. Well that’s not what it is famous for though. What made it very popular among electronic hobbyist is its unbelievable low cost. I got it just for $5 (~300 Rs.) An arduino along with a WiFi shield would cost 10 times of what this module costs.vvvvvIt can be interfaced with any microcontroller through USART communication, meaning it just need the RX and TX pins. Another feather to its hat was added recently. The developer released the SDK files of the module and hence even the module can be re-programmed and its GPIO pins can be used independently without any additional microcontroller. But that is beyond the scope of this tutorial. We would be using the module along with Arduino UNO.

Fingerprint Detection using Microcontroller

Contributor: 

Ganeev Singh

In today’s secure world biometric safety is on the top. Unlike other techniques which make use of passwords and numbers, that are needed to be remembered, biometric techniques make use of human body parts like fingerprints or even iris of your eyes and as we know that these things are unique to all thus it makes biometric systems the most effective over others. In this project I have interfaced a very popular fingerprint scanner R305 with AtMega 16 microcontroller. This module communicates over UART protocol with microcontroller i.e. it makes use of Rx and Tx pin of microcontroller to interact with it.

Sine Wave Oscillator using LM741

Contributor: 

A. M. Bhatt

Wien bridge oscillator is a combination of op-amp as an amplifier and a Wien bridge network in feedback path. Wien bridge network is made up of four arms. In one arm there is series RC network. In the adjoining arm there is parallel RC network. These two arms are called frequency sensitive arms. Rest two arms consist of two fixed value resistor. This type of network is called lead-lag network because at low frequency it acts like a lead and at high frequency it act like lag.

Arduino Based Voltmeter

Contributor: 

Ajish Alfred

This is a project based on Arduino board which can measure the unknown AC and DC voltages. When we connect the unknown voltage on the breadboard circuit, the 16x2 LCD displays the voltage value. The project uses an Arduino pro mini board whose ADC feature is used along with the concept of Voltage Divider circuit to develop this Voltmeter.

 

 

Invention Story: Noise Cancelling Headphones

Written By: 

Mohit Parikh

In 1978, Dr. Amar Bose - sound engineer, MIT professor and founder of Bose Corporation - was flying from USA to Switzerland when he was offered headphones by the airplane staff to listen to music on flight. But, in the constant drone of the airplane engines, and with no way to escape that drone, he could not enjoy the music. In fact, he could barely hear it. He fetched a paper napkin and began scribbling on it with his pen to see if it was possible to design headphones that could remove this noise. The company claims that the mathematical calculations that began in that flight, thousands of feet above the Atlantic Ocean, gave birth to a new era in the science of noise reduction and cancellation. Excited by his early calculations, as soon as Dr Bose returned from his trip to Europe he formed Noise Reduction Technology Group to work on this technology specifically. This, as they say, was history in the making.