I made an alarm using LDR(light dependent register). The alarm work depending on the light intensity, when light intensity will low then the alarm will rise up and when the light intensity will high then it remain off. My problem is that the buzzer is not playing continuously when the intensity is low. I need a continue beep and a reset button to reset the device and also the alarm.
Sorry, for my bad English. ....etc

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Please could you end me the write-up/materials on the topic testing and modeling of digital distance relay using matlab.
thank you. ....etc

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i can't download the file,plz give me the download link ....etc

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Introduction,circuit diagram,components,principle of the project,advantages,disadvantages,applications,future scop for LDR based street light using lm324 ic and relay. ....etc

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Abstract
This paper describes modelling and testing of a
digital distance relay for transmission line protection using
MATLAB/SIMULINK. SIMULINK’s Power System Blockset
(PSB) is used for detailed modelling of a power system
network and fault simulation. MATLAB is used to implement
programs of digital distance relaying algorithms and to serve
as main software environment. The technique is an
interactive simulation environment for relaying algorithm
design and evaluation. The basic principles of a digital
distance relay and som ....etc

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Sir,
i am supriya, i want to download free pdf of william stallings isdn and broadband isdn with frame relay and atm book. I am studying this book to increase my knowledge. Please i request you to grant me permission to download this book. please accept my request.

thank you.
yours faithfully,
supriya. ....etc

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i want ppt on design and construction of earth fault relay for single phase and three phase power system
....etc

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Zigbee Wireless Relay Control and Power Monitoring System



Introduction
We designed a system for wirelessly controlling relays and monitoring current. This is used for a home load simulation. By wirelessly turning relays on and off by sending commands from a PC to a microcontroller we can change the total load (current) to our simulated home. For wireless communication, we used XBee Series 2 Zigbee RF modules. One of these modules was connected to a micr ....etc

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Where can I download this book?
I need it for a final project and I can't find it anywhere :( ....etc

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Presented by
KALOLIA ALAP R


What are Relays?
 Relays are electrical switches that open or close another circuit under certain conditions.
 Relay Purpose
 Relay Types
Electromagnetic Relays (EMRs)
 EMRs consist of an input coil that's wound to accept a particular voltage signal, plus a set of one or more contacts that rely on an armature (or lever) activated by the energized coil to open or close an electrical circuit.
 Solid-state Relays (SSRs)
 SSRs use semiconductor output ....etc

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