What are the materials needed for the market survey of a clap switch project ....etc

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A Simple Light activated switch

Description.
This is the circuit diagram of a light activated switch based on National Semiconductors comparator IC LM 311 and a LDR.

The circuit is based on a voltage comparator circuit wired around IC 1.The non inverting in put of IC1 is given with a reference voltage of 6V using resistors R3 and R4. The input to the inverting input will be the voltage across the LDR that is light dependent. At darkness the resistance of the LDR will be high and so do the voltage across it. At this condition the voltage ....etc

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An infra-red or wireless remote control has the disadvantage that the small, handy, remote transmitter is often misplaced. The sound operated switch has the advantage that the transmitter is always with you. This project offers a way to control up to four latching switches with two claps of your hand. These switches may be used to control lights or fans or anything else that does not produce too loud a sound. To prevent an occasional loud sound from causing malfunction, the circuit is normally quiescent. The first clap takes it out of standby ....etc

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A clap switch circuit is a classic beginner s project.
Equipment can be switched on and off by just clapping your hands. Add a tiny microcontroller and you can easily build-in some more useful features.

The microcontroller in this circuit makes it a simple job to add some useful features that are not seen on other clap switch designs:

Changeover relay contacts enable the unit to be wired in conjunction with a manual changeover switch so that manual override of the switched equipment is always possible.
The unit is only responsive to a specif ....etc

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I'm doing my research on clap switch project, can someone tell me the page link that have proper information, this is for my research. Its doesn't matter if it book, website or any article as long its has proper information like who posted the article, when the articles are posted and the circuit operation. ....etc

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Abstract

This paper presents the design of a clap activated switch device that will serve well in different phono-controlled applications, providing inexpensive key and at the same time flee from false triggering. This involves the design of various sages consisting of the pickup transducer, low frequency, audio low power and low noise amplifier, timer, bistable and switches. It also consists of special network components to prevent false triggering and ensure desired performance objectives. A decade counter IC serves the bistable fu ....etc

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VOICE ACTIVATED SWITCH OR DOOR LOCK:- which recognise the speaker voice and works.It should identify the speaker. Neural network and embedded system ....etc

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to get information about the topic clap switch full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-clap-switch

http://seminarsprojects.net/Thread-clap-switch-details

http://seminarsprojects.net/Thread-clap-switch-theory ....etc

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To get full information or details of clap activated switch please have a look on the pages

http://seminarsprojects.net/Thread-design-of-a-clap-activated-switch

http://seminarsprojects.net/Thread-design-of-a-clap-activated-switch?pid=26326&mode=threaded

http://seminarsprojects.net/Thread-design-of-a-clap-activated-switch?pid=38118&mode=threaded

if you again feel trouble on clap activated switch please reply in that page and ask specific fields in clap activated switch ....etc

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CLAP SWITCH


Here s a clap switch free from false
triggering. To turn on/off any ap
pliance, you just have to clap
twice. The cir-cuit changes its output state
only when you clap twice within the set
time period. Here, you ve to clap within 3
seconds.
The clap sound sensed by condenser
microphone is amplified by transistor T1.
The amplified signal provides negative pulse
to pin 2 of IC1 and IC2, triggering both the
ICs. IC1, commonly used as a timer, is
wired here as a monost ....etc

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