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Archive for the ‘Projects’ Category


     Today’s busy lifestyle demands that people make use of technology that will enable them to maximize time. It is for this reason that the robotic lawn mowers have been sought after and easily accepted as a household “must-have”. Another reason by which robotic grass cutter has become a necessity in today’s life is to ensure operator safety .There may be stones, stick, wire, bones, toys, and other thrown objects that can cause personal injury. These situations force us to depend on these kinds of technologies.The Green mower is designed to provide a helping hand for the gardener. Here keys are provided to give the appropriate instruction for the motion of the vehicle. These are done by encoding the data given by the user and transmitted to the reception part. Here it is decoded and given to the motor driver for controlling the respective motors (right / left motor). The Grass cutting is implemented by a cutting motor and string. So cutting can be done by switching on the power of cutting motor and directing the vehicle by the remote. Robotic green mowers are environment-friendly. Automatic green mowers are designed to cut the grass in sizes which make it desirable as mulching material for your lawn. Upon decomposition, the cut grasses are returned to the soil and become a viable source of fertilizer for your lawn. Robotic green mowers run on electricity. With the practical sources of energy, robot green mowers help reduce global warming since it does not use gas or oil and it does not result in the emission of gases. Remote controlled green mowers make the reach-ability to remote areas possible.

      Remote controlled green mower is designed in a way that it has two sections. One section comprises the vehicle and the other a cutting part. With the provided remote control we can move the vehicle in different directions. Whenever the cutting action is to be performed, switch on the power of the cutting motor. Remote control operates at radio frequencies. Instructions are given through the switches on the remote control and transmitted to the vehicle. Signal received at the receiver of the vehicle is decoded if it matches with the encoding done at the transmitter section. Decoded data are given to the motor drive which has the capability of controlling two motors independently. Motor driver controls the direction of rotatory motion of the motor. It can be either in the clockwise or anti clockwise direction. 

Forward motion is carried out by the clockwise rotation of both left and right motor. Likewise the reverse motion is done by the anti clockwise rotation of both left and right motors. Left motion occurs by the clockwise rotation of left motor only. Right motion occurs by the clockwise rotation of right motor only.  

system over view:

Bock diagram over view of transmitter unit



           The Blue Brain Project is an attempt to create a synthetic brain
by reverse-engineering the mammalian brain down to the molecular
level. The aim of the project, founded in May 2005 by the Brain and
Mind Institute of the École Polytechnique in Lausanne, Switzerland, is
to study the brain’s architectural and functional principles. The project is
headed by the Institute’s director, Henry Markram. Using a Blue Gene
supercomputer running Michael Hines’s NEURON software, the
simulation does not consist simply of an artificial neural network, but
involves a biologically realistic model of neurons. It is hoped that it will
eventually shed light on the nature of consciousness. There are a number
of sub-projects, including the Cajal Blue Brain, coordinated by the
Supercomputing and Visualization Center of Madrid (CeSViMa), and
others run by universities and independent laboratories in the UK, US,
and Israel.

For presentation slide Click Here… latest blue


Programmable carrier vehicle

To design a carrier vehicle which follows the path specified by the user.

Also, the vehicle to follow a predesigned path.

To reduce and speed up the office work, by transporting files, and other books papers etc..

The basic block diagram contains a microcontroller used for over all control of the vehicle

motor controller used for control two motors to move the vehicle through pre designed path

optoencoder used for detect the path and inform to microcontroller

it also contain a LCD display,switches and two motor

How to design????????

Main Controller is based on Arduino Duemilanove board
This is a microcontroller board based on 1.Atmega328.
It has 14 digital i/p pins, in this six pin can be used as pwm out put
and six pin used as analog input
A 16 Mhz crystal oscillator, an usb connector, a power jack, and a reset button.

Flash memory 32 kb, 2kb used by boot loader.
SRAM 2kb.
EPROM 1kb.
Clock speed 16 Mhz. (more…)

MP3/iPod Mini speaker System

Do you have any interest in music? Do you wish you could listen and share your music wherever you go? With the mini speaker system project, you can listen to music whenever you want: your dorm, your cubicle, or at the beach. This is a great introduction to circuit systems, featuring an introductory amplifier circuit, a filter circuit, and a simple enclosure. When you’re done, all you need to do is add a 9V battery, plug in and play!

The Amplifier In Mini speaker system: it amplifies the current. That is, it takes an electrical signal and makes the signal stronger, and in the end, louder. An electrical signal that is passed by an amplifier comes out louder through the speaker than one that hasn’t been amplified. Also, because the signal is strengthened by an amplifier, you can play that music through higher resistant speakers. This amplifier is a solid-state-hi-gain design and is intended to run through an 8 ohm speaker.Schematic of the amplifier section is follows.

Open Programmer

An open source USB programmer for PIC micros, I2C-SPI-MicroWire EEPROMs, some ATMEL micros, generic I2C/SPI devices

Quick review

  • Completely free and Open Source
  • Programs PIC10-12-16-18-24, dsPIC30-33, EEPROMs type 24xxxx (I2C), 25xxx (SPI), 93xx6 (MicroWire), some ATMEL micros, communicates with generic I2C & SPI devices
  • Can work as ICD debugger
  • USB 2.0 Full Speed interface, HID class (same as keyboards, mice, etc.)
  • Self powered
  • Doesn’t need drivers
  • Built from easy to find components (estimated cost ~10€)
  • Hardware generated timings for maximum speed and reliability (writes a 18F2550 in 15s, 8s under Linux)
  • Doesn’t saturate your CPU and doesn’t suffer when other programs are running
  • Open source control programs for Linux and Windows (more…)

PC Based Oscilloscope

        Now a day more and more experiments are now ‘PC Based’. Also conventional acquisition systems are very expensive.Since Portable PCs are now common and USB link is better solution than Other ports.Here we present an Oscilloscope using USB Port of the PC that operates up to 10Khz with ±16V input voltage

         The oscilloscope uses IC PIC18F2550 from Microchip as the main controller, which makes the oscilloscope compact as there is no need of additional power supply for the entire circuit board. The microcontoller has an USB2.0 compliant transceiver and a CPU running up to 12 MB/s.It has a 10Bit ADC module with up to 13- channel multiplexer.

  • A user-interface softwar  is used for output.