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Title: liquid level Alarm
Page Link: liquid level Alarm -
Posted By: electronics seminars
Created at: Saturday 09th of January 2010 08:31:42 PM
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liquid level Alarm
Here is a simple circuit for Liquid level alarm. It is built Around two BC547 transistors(T1 and T2) and two timer 555 ICs (IC1and IC2). Both IC1 and IC2 are wired in astable multivibrator mode. TimerIC1 produces low frequency, while timer IC2 produces high frequency. As a result, a beeping tone is generated when the liquid tank is full. Initially, when the tank is empty, transistor T1 does not conduct. Consequently, transistor T2 conducts and pin 4 of IC1 is low. This low voltage disables IC1 and it does ....etc

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Title: Simple Sound Activated Burglar Alarm System
Page Link: Simple Sound Activated Burglar Alarm System -
Posted By: Sidewinder
Created at: Sunday 16th of May 2010 11:47:40 AM
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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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Title: Optical Smoke detector Fire alarm with strobe lighting
Page Link: Optical Smoke detector Fire alarm with strobe lighting -
Posted By: J-Phoenixxx
Created at: Sunday 29th of November 2009 10:48:24 AM
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Hey Guyz, I really need some material on the topic. I've gotten some stuffs, but i'm not really satisfied with them. pls kindly help me out.......Thanks(in advance)




Shoutout to Computer-science-crazy. You're the best ....etc

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Title: Advanced Wireless system with Security System for Fire Safety with Alarm
Page Link: Advanced Wireless system with Security System for Fire Safety with Alarm -
Posted By: electronics seminars
Created at: Thursday 10th of December 2009 05:04:15 PM
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Abstract:
It is an Intelligent IP based Intrusion Alarm with Home Automation Panel,to protect offices,home from hazards such as fire, theft, gun-point threat, and protecting safe deposit lockers/vaults, cash carrying mobile vans, ATM's etc. Shops and Establishments, especially jewellery shops to protect premises from hazards such as fire, theft, gun-point threat...etc, the connection is manly Wireless technology like Mobile phones,PDA, wireless internet,(WiFi),..etc ....etc

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Title: Light sensitive Alarm
Page Link: Light sensitive Alarm -
Posted By: seminar topics
Created at: Tuesday 30th of March 2010 10:02:39 PM
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The circuit detects a sudden shadow falling on the light-sensor and sounds the bleeper when this happens. The circuit will not respond to gradual changes in brightness to avoid false alarms. The bleeper sounds for only a short time to prevent the battery running flat. Normal lighting can be used, but the circuit will work best if a beam of light is arranged to fall on the light-sensor. Breaking this beam will then cause the bleeper to sound. The light sensor is an LDR (light-dependant resistor), this has a low resistance in bright light and a ....etc

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Title: Railways accident Avoiding System Level crossing and Fire Alarm
Page Link: Railways accident Avoiding System Level crossing and Fire Alarm -
Posted By: amitruikar01
Created at: Tuesday 02nd of February 2010 11:56:12 PM
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Respected sir,

I am doing mechanical diploma from government polytechnic pune.
so i want idea about above topic. And what about its cost. Can we help me for this project. ....etc

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Title: Automated alarm CirCuits
Page Link: Automated alarm CirCuits -
Posted By: mechanical wiki
Created at: Tuesday 08th of September 2009 06:34:49 PM
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Two alarm circuits are presented here. One produces bird-chirping sound and the other British police siren tone. Fig. 1 shows the circuit of the birdchirping- sound alarm unit along with the circuit of the control unit. Fig. 2 shows the circuit of only the British police siren tone generator, which has
to be integrated with the control circuit portion of Fig. 1 at points A and B to complete the circuit diagram of automated alarm

http://ziddudownload/5196571/AUTOMATEDALARMCIRCUITS_1.pdf.html ....etc

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Title: intruder alarm system
Page Link: intruder alarm system -
Posted By: sunny90
Created at: Wednesday 14th of April 2010 03:03:39 PM
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plz mail me the details ....etc

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Title: water level detector using buzzing alarm using microcontroller
Page Link: water level detector using buzzing alarm using microcontroller -
Posted By: raju.vishwanath
Created at: Tuesday 16th of February 2010 04:02:03 PM
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I am student from eee dept. I want to do a project on 'water evel detector using buzzing alarm to indicate the reaching of water level upto the mark' using microcontroller. please provide me the description and the steps. thank you. ....etc

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Title: 8051 based lamp with alarm
Page Link: 8051 based lamp with alarm -
Posted By: ajithindu
Created at: Friday 02nd of April 2010 10:01:52 AM
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any information regarding topic,pplse post it... ....etc

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