advantages and disadvantages of water level alarm..plz tell me.. ....etc

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Hi,am a college student doing a project on fire alarm using a thermistor. i humbly need your help in my project and your help will be much appreciated. i need advantages of using this kind of fire alarm. ....etc

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To get full information or details of fire alarm using thermistor please have a look on the pages

http://seminarsprojects.net/Thread-simple-fire-alarm-circuit

if you again feel trouble on fire alarm using thermistor please reply in that page and ask specific fields in fire alarm using thermistor ....etc

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fire alarm using thermistor
advantages and disadvantages
The IC1 (NE555) is configured as a free running oscillator at audio frequency. The transistors T1 and T2 drive IC1. The output (pin 3) of IC1 is couples to base of transistor T3 (SL100), which drives the speaker to generate alarm sound. The frequency of NE555 depends on the values of resistances R5 and R6 and capacitance C2. When thermistor becomes hot, it gives a low-resistance path for the positive voltage to the base of transistor T1 through diode D1 and resistance R2. Capacitor C1 ....etc

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A water detector is an electronic device that is designed to detect the presence of water and provide an alert in time to allow the prevention of water damage. A common design is a small cable or device that lies flat on a floor and relies on the electrical conductivity of water to decrease the resistance across two contacts. The device then sounds an audible alarm together with providing onward signalling in the presence of enough water to bridge the contacts. These are useful in a normally occupied area near any infrastructure that has the po ....etc

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Many fire alarm circuits are presented here,but this time a new circuit using a thermistor and a timer to do the trick. The circuit is as simple and straight forward so that, it can be easily implemented. The thermistor offers a low resistance at high temperature and high resistance at low temperature. This phenomenon is employed here for sensing the fire.

The IC1 (NE555) is configured as a free running oscillator at audio frequency. The transistors T1 and T2 drive IC1. The output (pin 3) of IC1 is couples to base of transistor T3 (SL100), w ....etc

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please show report on the investigatory project fire Alarm full report ....etc

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I am looking for PCB layout of temperature controlled fan using thermistor and IC 741. Can anyone help, please? ....etc

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In the past, hardwired alarm systems are the only choice for customers who need security equipment to protect premises. Today, with rapid technology evolve, many users shift from hardwired alarm to wireless alarm. It seems home security industry is moving from hardwired to wireless, but as one of mature and stable alarm equipment, some users still favor the hard wired alarm system. In this article, we will show you some basic information about advantages and disadvantages of hardwired alarm systems.

What s hardwired alarm system ?

Alarm ....etc

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To get full information or details of fire fighting robot please have a look on the pages

http://seminarsprojects.net/Thread-microcontroller-based-fire-fighting-robot-full-report?pid=40381&mode=threaded

http://seminarsprojects.net/Thread-fire-fighting-robot--21445

http://seminarsprojects.net/Thread-microcontroller-based-fire-fighting-robot-full-report?pid=15403&mode=threaded

if you again feel trouble on fire fighting robot please reply in that page and ask specific fields in fire fighting robot ....etc

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