Project on Wireless Drawing Device

For our final project, we want to build a wireless drawing device. The user uses a keypad or a mouse to draw on the TV through a wireless communication medium (RF - 433.92 MHz). The user should be able to move
the drawing pointer to anywhere within the four border lines. One should also be able to draw or erase images on the TV screen. In designing this project, we have two goals - a primary, which is realizable, and a secondary, which is feasible. Our realizable goal is to build a wireless keypad interface with the television. In this interface, we want the keypad to be able to draw and erase on the TV. When we accomplish our primary goal, we shall attempt to achieve our secondary goal: to build a wireless mouse having the same functionality as the keypad. Due to time constraints, we ended up only being able to complete the primary goal. We chose this project because we were inspired by wireless communication technology.

Download Project from here:
http://www.mediafire.com/?svsgvjw7jazvlnf




THIS IS MY 100th Post. Thank you all who encourage me to go on posting.

Project on Security Entrance System

Our security system is a stand alone device that allows access to registered users identified by their magnetic cards.(For this project, "access" is represented by a lit LED, showing how the system could be used to control an external locking mechanism.)The system includes features such as:

• Multiple accounts, including Administrator accounts (which can create, modify, or delete the other accounts). The account information is stored in non-volatile EEPROM memory, so that it is maintained even if the system is reset.
• A "lock down" of the system when someone tries to gain access by repeatedly swiping incorrect cards.
• A 20x4 LCD display to give the user feedback on the current state (such as "Access allowed." or "try swiping the card the other way.") and to prompt administrators for commands. All messages printed to the LCD are simultaneously transmitted to an RS232 port, so that all activity can be logged by a PC. 

Download Links:
http://www.mediafire.com/?ngtweqtgztjypy2

Project On LEDZEPPELIN HARP

  We resolved to build the poor man’s laser harp, using LED emitters shining across a set of sensors that would notice when we blocked them with our hands.  It needed to play tones that sounded sweet and lovely when we needed it for ballads, and hard-edged and techno when we were feeling the dirty nerdy groove.  It needed to play several notes at once and listen to a remote control.  Most of all, it needed to have a 3.5mm jack so that someday we could live the dream, playing it in that room next to that guy, fog machines and all.

Download Link:http://www.mediafire.com/?udu7atf1p89mlh6

Project on Low-Cost Portable Potentiostat for Biosensing Applications

A potentiostat is an instrument used in chemical and biological tests that controls the voltage between two electrodes, working and reference, at a constant value. Chemical and biological tests are typically run in a three-electrode system, which includes the aforementioned working and reference electrode as well as a counter electrode. These systems are used to test the electrical activity of certain compounds or microbes, where the electrode acts as either the electron acceptor or electron donor. By monitoring the current and plotting the data against either time (chronoamperometry) or potential (voltammetry), information can be obtained as to the electrochemical activity of chemical compounds and/or microbes. In this project, we will present a design for this potentiostat using the ATMega644, an external digital-to-analog converter (DAC), and a series of operational amplifiers (op-amps). We will utilize the serial peripheral interface (SPI) to communicate between the microcontroller and DAC, the op-amps to process the signal from the DAC and apply a potential to the electrochemical cell, and the internal analog-to-digital converter (ADC) to record the current at the working electrode.

 Download Link:

http://www.mediafire.com/?v5jd559wsr9g3sc