DIY Arduino Uno Based Dozer Bot

This lucrative Arduino application, named as Rhino Bot, has been made by Miguel Angel de Frutos, a Spanish enthusiast in one of the most advanced manner that apart from the Uno, everything can be downloaded. The codes have been zipped and uploaded, the plastic parts have their 3D printable formats uploaded and an instruction manual has been clubbed along. This means that when you get down to business in making this machine, there won’t be resource shortage from the innovator’s side, that’s the power of Open Source!! For those who want to see the bot performing before they start building it, a fair demonstration video has also been shared.

Arduino Based Voltmeter


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.

Sunshine Alarm

At some point in time, we all have resolved to wake up with the very first rays of the sun. To watch the pleasing, muted colors of dawn, the slow and steady rise of the orange sun in the sky, to listen to the chirpings of morning birds; and perhaps also to do some exercise or yoga. But more often than not, we have failed, and we have given up.

In the project we explore today, a “sunshine alarm” is designed using LittleBits, a smart phone and a handy tool kit. A USB powered DC motor based is programmed and enclosed in a wooden case.

Buck Regulator Based Phone Charger


Ganesh Selvaraj

This tutorial shows you how to make a phone charger which uses any DC source (AAA/AA/SLA battery) as input and is efficient in terms of power utilization. 

We’ve been holding onto 7805 regulator IC from a very long time and hence a question may arise as to why we are not using the same this time. Well all these days we didn’t care about the efficiency since it was either a low current application or ones which didn’t run completely on battery but this time it is different. This time our aim is to create a device which runs on battery and needs to be utilizing the battery’s energy efficiently.

Waveform Converter Circuits


A. M. Bhatt

There are many different kind of waveforms like sine wave, cosine wave, square wave, triangular wave, sawtooth wave, pulses, spikes, stair-case wave, ramp etc. All these waveforms are generated using oscillator circuits.

Waveform converter circuits convert one type of wave into other. The function generator itself uses such circuits to generate different kinds of waveforms. These circuits are very much useful when some circuits require one specific kind of wave as an input.

Accelerometer Controlled Robot without a Microcontroller


Ganesh Selvaraj

You may have come across many tutorials about accelerometer controlled wireless robot (also known as gesture controlled or glove controlled) but all of them would have a microcontroller. This tutorial teaches you how to make them without using any microcontroller.