Cell Phone Detector

The project that we will discuss here today is capable of detecting the cell phone from a half meter. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc. It is also useful for detecting the use of mobile phone for spying and unauthorized video transmission.The circuit can detect both the incoming and outgoing calls, SMS and video transmission even if the mobile phone is kept in the silent mode. The moment the bug detects RF transmission signal from an activated mobile phone, it starts sounding a beep alarm and the LED blinks. The alarm continues until the signal transmission ceases.

1.5 - 35 Volt DC Regulated Power Supply

Here is the circuit diagram of regulated power supply. It is a small power supply that provides a regulated voltage, adjustable between 1.5 and 35 volts at 1 ampere. This circuit is ready to use, you just need to add a suitable transformer. This circuit is thermal overload protected because the current limiter and thermal overload protection are included in the IC.

Gas Leakage Alarm using IC 555

In todays time everyone uses LPG gas at homes. Since the LPG is heavier than air so it tends to settle down along the floors and may results in dangerous fire or even a blast.
So in this project we will learn how to make a LPG Gas Leakage Alarm using IC555.

Bicyle Light: Cycle Dynamo

With this circuit built, boxed up and installed in your bicycle, you can look forward to safely riding your cool bicycle at night. The circuit ensures that the bicycle lights remain ‘on’ for a little while after the bicycle has come to a standstill.

The circuit is 6V, 3W dynamo compatible and its working is very simple and straightforward. When the bicycle dynamo is idle, it connects the light source to the reservoir battery pack until the dynamo starts generating voltage again. The circuit also prevents the light source against high power when the dynamo is running, and uses the available surplus power to recharge the battery pack.

Download various 4 bit LCD interface libraries

Description	In our engineering projects we usually use microcontroller. To interface the LCD we need a set of libraries which help us to set some basic routines for interface (this is for 4 bit interface). so here in this post we are providing you some set of that libraries for interfacing. All the best !!
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Accident alert and vehicle tracking system

This project is an intelligent Accident alert system which not only notifies accidental alert but also provides the exact location where the accident has taken place. This project is submitted by a young enthusiast Pawan Kumar from Chennai. This is the first ARM project submitted on our website

GSM Controlled Robot (with project report)

we already had a great start of this year with PIC Industrial and Domestic Timer project but that is not all for this year I received one more project today from students of Terna Polytechnic College. The is named as "Cellphone operated Land Rover" but i call it GSM controlled robot small and simple. well you can give name of your choice.

Single Phase AC Motor Speed Controller (with project report)

Everyone wants to control real world devices through microcontroller but we all wonders, how this can be done? So Here is another sensational project from our known friend Nasim Majoka (Majoka) who also our forum moderator. Single Phase AC Motor Speed Controller project will explain you what exactly is needed to make control a real world device using our well known 8051 microcontroller. In this project user can use switches to controll speed of AC motor and LED display is provided to show the current speed. This project also comes with a Windows application written in Visual Basic from where you can control speed of motor.

Water Level Indicator with alarm using IC CD4066

What is water level indicator: Water level indicator is a device which is used to measure the level of water or any other conductive liquid in a container. By following a very simple circuit this device can be implemented . Along with indicating the water level it will also give you a alarm when the tank becomes full.

Water level Controller Circuit

Description.

A simple but very reliable and effective water level controller circuit diagram is shown here. The circuit uses 6 transistors, 1 NE555 timer IC, a relay and few passive components. The circuit is completely automatic which starts the pump motor when the water level in the over head tank goes below a preset level and switches OFF the pump when the water level in the over head tank goes above the full level.

Simple Combination lock Project with keypad and LCD using pic16f628A

A Brief Description: This project is written in C language. The basic user lock is of 2 Digits. The input is taken from a 4x3 Keypad (please see the schematic for more information) and Display the user input on a 2x16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration I have connected an LED to that pin.

LCD interfacing with Microcontrollers tutorial - 4-bit Mode

Introduction

Till now whatever we discussed in the previous part of ths LCD tutorial, we were dealing with 8-bit mode. Now we are going to learn how to use LCD in 4-bit mode. There are many reasons why sometime we prefer to use LCD in 4-bit mode instead of 8-bit. One basic reason is lesser number of pins are needed to interface LCD.

Contactless Digital Tachometer using PIC Microcontroller

Contactless Digital Tachometer using PIC Microcontroller Hey friends, I should have posted this project last month itself but there was some problem with the circuit. [link], author of this project did an exellent job. I have been watching him learning on this website. He came as a total noob but now he is well versed with 8051 and PIC microcontroller.

8051 Time delay/Timer routine calculator

It's been a long time I have been developing things for 8051/52 core family and got always stuck with the same old thing. The timer calculations. So I decided to write a small Calculator to do the job for me. It is very basic but hopefully solve most of day to day needs.

Home Automation Over Internet

Home Automation Over Internet Now stuff added in the project. Added Indicator for new message Added New command to control dimness of LED Updated Schematic Updated Power Supply

Automatic plant Irrigation (AT89C2051)

Description

The Project presented here waters your plants regularly when you are out for vocation. The circuit comprises sensor parts built using op-amp IC LM324. Op-amp’s are configured here as a comparator. Two stiff copper wires are inserted in the soil to sense the whether the Soil is wet or dry. The

Digital Lock Using AT89C2051 with LCD and Keypad - Assembly

Digital Lock Using AT89C2051 with LCD and Keypad - Assembly A Brief Description: This project is a rewrite of previously made project "Digital Code Lock using keypad and LCD" I got many requests from student's side who want this project in Assembly language. So i spent some time making this project. You will find working of this project same as that of original project. Nothing has been changed as such.

Electronic Voting machine with Managed Control Unit (Project Report Included)

Introduction: EVM is capable of saving considerable printing stationery and transport of large volumes of electoral material. It is easy to transport, store, and maintain. It completely rules out the chance of invalid votes. Its use results in reduction of polling time, resulting in fewer problems in electoral preparations, law and order, candidates' expenditure, etc. and easy and accurate counting without any mischief at the counting centre. It is also eco friendly.

BASCOM-8051 Project : Multicounter Project using AT89C2051

GioppY wrote ... BASCOM-8051 compiler AT89C2051 Simple counter frequency range 1Hz - 400.000Hz period range 100uS. - 8.000.000uS. N.B. The counter DO NOT WORKS beyond the specified range. low frequency 1 / period tachometer 60 / period Low frequency and tachometer are derived from the period measure.They are displayed with a decimal digit.

C51 Snakes - A Nokia inspired game built on 8051

I think all of us have played the famous snake game in nokia phones. It was one of the best game in its time. But not only in phone you can implement the same by using LEDs and microcontroller 8051. 

ABOUT :  The Nokia inspired Sanke game implemented on 8051 platform.

The game is built on AT89S51