Electrofriends

Device Switching Using PC’s Parallel Port

by Ranjith | November 20th, 2008.
Device Switching Using PC’s  Parallel Port

Imagine the convenience, if we could control different devices at home/industry by using a single PC. Our project aims at the same and could be used to control the printer power, loads & other household electrical appliances. The circuit comprises decoder, inverter, latch & relay driver sections. To control these equipments we are using PC’s [...]

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Lexical Analyzer

by Ranjith | November 20th, 2008.
Lexical Analyzer

Lexical analyzer converts stream of input characters into a stream of tokens. The different tokens that our lexical analyzer identifies are as follows:
KEYWORDS: int, char, float, double, if, for, while, else, switch, struct, printf, scanf, case, break, return, typedef, void
IDENTIFIERS: main, fopen, getch etc
NUMBERS: positive and negative integers, positive and negative floating point numbers.
OPERATORS: +, [...]

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Doctor’s Diary using JSP Technology

by Ranjith | November 20th, 2008.
Doctor's Diary using JSP Technology

This is the model software from electrofriends.com. We successfully implemented the need and necessary concepts of a doctor, for his stand alone clinic. We hope this software package will definitely help the students, to get an idea about their academic projects.
For a doctor, it is absolutely difficult to keep all the details of his patients [...]

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Induction furnace control system

by Ranjith | November 20th, 2008.
Induction furnace control system

This project is an attempted step towards resolving the manual problems in controlling Induction Furnace and provides control for it, using Artificial Intelligence at a very small scale. The project deals with a simple aspect of giving information about the Induction Furnace and their control. Initially it provided a system release manual power as much [...]

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Intelligent Train Engines

by Ranjith | November 20th, 2008.
Intelligent Train Engines

The idea is whenever any engine observes a red signal on its track it will start decreasing its speed gradually and stops automatically at some distance from the signal pole. After then when it gets green signal the driver can manually start the train and go on.

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Robotic car using 8951 Microcontroller

by Ranjith | November 19th, 2008.
Robotic car using 8951 Microcontroller

Robotic Car is a miniature prototype car powered by batteries whose various movements can be control either manually or automatically, or the combination of both.

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Water level indicator cum controller

by Ranjith | November 19th, 2008.
Water level indicator cum controller

The present concept implements controlling of pump which pumps water from the sump (underground tank) to the overhead tank, using 8951 microcontroller.
The control panel, i.e. the main control unit of the system which consists of the primary control switches, pump indicator, siren and level indicators. The visual example of how switches And the indicators can [...]

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Programmable number lock system

by Ranjith | November 19th, 2008.
Programmable number lock system

Programmable number lock system is a high security number lock system that can be used to lock electronic devices. The present system is very user friendly. This system is a combination of software and hardware at its best. We have used a 8051 microcontroller kit for interfacing our system.

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Real Time Clock using CAT89C4051

by Ranjith | November 19th, 2008.
Real Time Clock using CAT89C4051

Hello friends, here is a clock project where CAT89C4051 is used as RTC. LCD is used for display. Using CGRAM area of LCD you cn create cistome characters. Here you will be able to see big and better digits in LCD. The digits are twice the size of the normal digits.
PCB design for project is [...]

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Digital Code lock using AT89C2051

by Ranjith | November 18th, 2008.
Digital Code lock using AT89C2051

Here is a project called ‘Digital Code Lock using AT89C2051′. LCD is used for display and a keyboard is used to input  the keys. This project source code is written in C. Both the C files and hex files are given for download.
A Brief Description:
This a simple project with efficient hacking prevention from Brute Force [...]

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