Two Stage FM Transmitter

After a two months we are back with a Simple and Working FM Transmitter Circuitry.This a two stage FM Transmitter which is in work fine and you can use it to transmit your signal over a long distance,Its work within 100 meters to 2-3KM.Frequency Range is 87.5MHz to 108MHz.For transmitting over a 2-3KM,its require a minimum 75cm antenna height.Increasing a antenna height will always give us a better range but 2-3KM Transmission is sufficient for smaller projects and increasing height will cause a circuit unstable so please keep your antenna height in between a 75cm-100cm.

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Filed Under: hobby project, Radio

VHF Field Strength Meter

Above Circuit Show wide band VHF field strength meter. The field strength is measured by converting the radio signal to DC and measuring it. The RF signal will be picked up by the coil and rectified by the diode D1.Even a very small DC voltage is sufficient to alter the biasing of FET and it will be reflected in the meter as an indication of the presence of a radio signal. The meter can be calibrated by adjusting the preset R2 to make meter M1 read ZERO in the absence of any radio signal. This circuit is not very sensitive, but can sense radio signals from hand held FM transmitters up to a distance of few meters( ideal for theoretical demonstrations).

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Filed Under: Detector

Quite Universal Circuit Simulator

Qucs[Quite Universal Circuit Simulator] is free circuit simulator with graphical user interface and power full features.Qucs support all kind of circuit simulation types,like DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported.
Qucs is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behavior of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window.

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Filed Under: Elex-Soft

Logisim-Logic Circuits Simulator

Logisim is a simple but powerful software for making or simulating digital logic circuits.With its simple toolbar interface and simulation of circuits as you build them, it is simple enough to facilitate learning the most basic concepts related to logic circuits. With the capacity to build larger circuits from smaller sub circuits, and to draw bundles of wires with a single mouse drag, Logisim can be used (and is used) to design and simulate entire CPUs for educational purposes.

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Filed Under: Elex-Soft

How to Design Circuit Layout

Designing a Circuit Diagram is quite easy but designing a Circuit Layout is somewhat difficult.Generally students prefer manual method for designing layout in which first of all circuit layout is drawn and then mirror image of the same is drawn on the PCB using permanent marker.Making circuit layout using software is quite difficult but we can't escape our self when we are talking about a big project consisting of numerous components.In such cases preparing layout using manual method is tedious venture.

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Filed Under: Circuit Design

Coil Inductance Calculator

Finding a Coil Inductance is a difficult,so we introduce Coil Inductance Calculator Here.
Inductance is the ability to store energy in a magnetic field, and coils are a very common way to create inductance. Many magnetic field coupling circuits, like chokes and transformers take advantage of a coil’s magnetic storage properties. The variables used in this tool are the diameter of the wire conductor and the diameter of the wire loop, number of turns, and the relative permeability.

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Filed Under: Tools

How To Construct Light Alarm System

his project provides the schematic and the parts list needed to construct a simple Light Alarm. Protect your medicine cabinet, cash drawer or lolly cupboard with this alarm. It will sound as soon as the drawer is opened and light falls on the Darlington phototransistor. It may be connected remotely at the end of two pieces of wire. The output alarm may be redesigned to activate a relay or triac.
The project is a light alarm which will detect very low levels of light. It will not work as well as your eye in detecting light because the human eye is the most sensitive light detector there is. But it comes close. For best results have the MAL12 pointed in the direction which light will come.

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Filed Under: LED, Security

PartSim

PartSim is a free and easy to use circuit simulator that runs in your web browser. This free online software allows you to design a great circuit diagram.Its a latest in circuit diagram making for creating,editing a simple or complex circuit diagram easily.Its offer many great option,like includes an integrated Bill-Of-Materials manager that lets you assign Part Numbers to your models.

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Filed Under: Elex-Soft

Circuit Maker 6 Professional

Circuit Maker 6 Professional is a simplest application for designing a electronics circuit diagram.I familiar this software in Second Year.After this i try many software but no one is simple as Circuit Maker 6 Professional.its a simplest in terms of designing a circuit.I prefer it to design a circuit for this website.its lake a many function but sufficient for beginners for designing a simple and some complex circuit.

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Filed Under: Elex-Soft

Single To Dual Polarity Voltage Converter

This is a Simple Single Polarity to Dual Polarity Converter,Its work on a voltage divider rule.This Circuit convert a single 24volt to +12volt,-12volt And Common Ground.This Circuit is really Help full in Experiment where Ic741 is used.Ic741 Wants a +12Volt at Pin7 and -12Volt at Pin4.In this situation above displayed circuit is very help full for providing both supply from a single power supply.This circuit also help full in Hobby Projects.This circuit is easy to implement,easy to design and very low cost.

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Filed Under: Converter

Automatic Guided Vehicles

Automatic Guided Vehicles can carry loads or tow objects behind them in trailers.The trailers can be used to move raw materials or finished product.The Automatic Guided Vehicles can also store objects on a bed.some Automatic Guided Vehicles use fork lifts to lift objects for storage.Automatic Guided Vehicles are employed in nearly every industry including paper,metals,newspaper and general manufacturing.An Automatic Guided Vehicles can also be called a laser guided vehicle(LGV) or self-guided vehicle (SGV).In Germany the technology is also called Fahrerlose Transport system(FTS) and in Sweden Forarlosa trucker.Automatic Guided Vehicles are available in a variety of models and can be used to move products on an assembly line,transport goods throughout a plant or warehouse.

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Filed Under: Seminar Reports And PPTs

Multi Sensor System for Obstacle Detection in Train Applications

Autonomously driving trains are under development for future systems to enhance public passenger traffic.However,the safety level for this application has to be the same as in conven-tional systems.
Therefore,very capable sensor systems are considered which should detect all obstacles in front of the train.There is no single sensor system available which has the capability to fulfill all given requirements.For this reason, a multi sensor system containing radar and video technology is under investigation for this challenging application.

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Filed Under: Seminar Reports And PPTs

High-Speed Obstacle Detection for Automated Highway Applications

Highway obstacle detection is a challenging problem.Highways present an unknown and dynamic environment with real-time constraints.In addition,the high speeds of travel force a system to detect objects at long ranges.Although there are a number of methods that can successfully detect moving vehicles,the more difficult problem of finding small,static road debris such as tires or crates remains unsolved.Systems such as the Automated Highway System (AHS) which demand high levels of safety are not feasible unless these critical problems are addressed.Although the problem of detecting static obstacles has been tackled in both the crosscountry and indoor mobile robot navigation literature,these systems have operated at low speeds (5 - 10 mph or less) and short range.

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Filed Under: Seminar Reports And PPTs

Wireless Electrocardiogram

Description:

The purpose of this project is to create a portable Electrocardiogram (ECG) to monitor patients who are in their houses or employees with risk of heart attack.The context for this project is the integration of wireless communication in medical applications for home healthcare.This means that, patients are no longer bound to a specific healthcare location where they are monitored by medical instruments.Wireless communication will not only provide them with safe and accurate monitoring, but also the freedom of movement.

This portable ECG will monitor the patients with 3 electrodes that will measure the body information.

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Filed Under: Detector, hobby project

Failed Railway Track Information System Using GSM

Now a days we are facing the problem of nasalize and terrorist everywhere in India. This problem is very big in railways they often destroy the railways track to monitor and intimate the long railway track so in this abstract we develop a idea to create a Failed Railway Track Information System Using GSM.

Abstract:-

In our system we sense the track is ok if not the sensor gives signal to the microcontroller then signal is changed to red and voice playback is played indicating that track is faulty for the peoples around and the railway engine driver.

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Filed Under: Seminar Reports And PPTs

Automatic Meter Reading System

Automatic Meter Reading System[AMR]:

• Automatic Remote Meter Reading .
• Automating the process of measurement through digital communication techniques.

Critical Benefits from AMRS

• Ability to detect tamper events and outage occurrences.
• Remotely Connect/ Disconnect power supply through meter.
• Calculate transformer loading and sizing from interval data
• 15 minute interval data gives accurate load information for supply scheduling,switching operations, planning etc
• Monitor voltage at each premise to know conditions when to operate capacitor switches or regulators
• Consistent and granular data for improved accuracy

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Filed Under: Seminar Reports And PPTs

GSM Based Energy Meter

Traditional metering method for retrieving the energy data is not convenient and the cost of the data logging systems is high. So this paper presents of design and development of Automatic meter reading (AMR) system. AMR system is a boom for remote monitoring and control domestic energy meter. AMR system give the information of meter reading,power cut, total load used, power disconnect and tempering on request or regularly in particular interval through SMS.This information is being sent and received by concerned energy Provider Company with the help of Global system for mobile communication (GSM) network. Energy provider receives the meter reading within a second without visiting person.AMR minimize the number of traditional visits required by employs of energy Provider Company.

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Filed Under: Mobile

Battery Monitor Using LEDs

Battery monitor using dual-colour LED

A battery monitor can be made with a dual-colour LED and a few components. The LED produces orange when the red and green LEDs are illuminated.The following circuit turns on the red LED below 10.5v The orange LED illuminates between 10.5v and 11.6v. The green LED illuminates above 11.6v.

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Filed Under: LED

DUAL 3v and 1.5v WHITE LED FLASHER

DUAL 3v WHITE LED FLASHER:This circuit alternately flashes two white LEDs,on a 3v supply and produces a very bright flash.The circuit produces a voltage higher than 5v if the LED is not in circuit but the LED limits the voltage to its characteristic voltage of 3.2v to 3.6v.The circuit takes about 2mA and is actually a voltage-doubler (voltage incrementer) arrangement.
The 1k charges the 100u and the diode drops 0.6v to prevent the LED from starting to illuminate on 3v. When a transistor conducts, the collector pulls the 100u down towards the 0v rail and the negative of the electro is actually about 2v below the 0v rail.The LED sees 3v + 2v and illuminates very brightly when the voltage reaches about 3.4v. All the energy in the electro is pumped into the LED to produce a very bright flash.

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Filed Under: LED

Bomb Disposal Robot

Wireless Bomb Disposal Robot uses a control application, at the user end to control the robot remotely using Wireless technology. The bomb technician controls the robot using this application. Input from the user is transmitted serially over an RF link to the Robot, where it is received, identified and relayed to the appropriate module.

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Filed Under: Detector