To get full information or details of history of automatic night lamp switche please have a look on the pages

http://slidesharepratikparekh1/automatic-led-night-lamp

http://electroschematics2866/automatic-night-lamp-with-morning-alarm/

http://engineersgaragecontribution/automatic-night-light-control

http://indiastudychannelprojects/1383-CONSTRUCTION-OF-AN-AUTOMATIC-NIGHT-LAMP.aspx

http://circuitstodayautomatic-night-light

if you again feel trouble on history of automatic night lamp switche please reply in that page and ask specific fiel ....etc

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respected sir,
I want to build a mini robot having a bulldozer arm controlled by joystick for taking part in robot wars in our college..sir i want ckt diag bcs i want to implement by myself..
sir, I want to build a mini robot having a bulldozer arm controlled by joystick for taking part in robo wars in our college..sir i want the ckt diag bcs i want to implement myself..my email id is:[email protected] am eagerly waiting for ur rply.. ....etc

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Presented by:
Soo-young Suk and Hiroaki Kojima





Introduction

People with severe speech and motor impairment due to cerebral palsy are great difficult to move independently and also cannot control home electric devices. Computer has much to offer people with disability, but the standard human-machine interface (e.g. keyboard and mouse) is inaccessible to this population. In this chapter, we describe a speech recognition interface for the control of powered wheelchair and home automation systems via ....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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When the intensity of sound exceeds certain intensity, the alarm is
triggered and the siren begins to operate. The speaker beeps and the flasher
(light) flashes. Thus the owner of the residence is alerted when an intruder comes.

The functional block diagram includes
-MICROPHONE
-AMPLIFIER
-LATCH
-OSCILLATOR
-FLASHER
-SPEAKER

a 600O unidirectional moving coil microphone is used. LM386 CMOS operational amplifier was the main component in the amplifier. It had a gain of 200. The amplifier then passes it on to the latch section of t ....etc

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to get iformation about the topic knock vibration earthquake activated alarm full report ppt and related topic refer the page link bellow

http://seminarsprojects.in/showthread.php?mode=linear&tid=38400

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Circuit diagram of rfid and gsm based intelligent letterbox circuit diagram
circuit diagram of rfid and gsm based intelligent letterbox mailbox circuit diagram ....etc

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