This temperature switch project will provide you with an understanding of the use of germanium diode and how it works compared to the more common silicon diode. It works on the principle that as the temperature surrounding the germanium diode increases, the back resistance decreases sharply.



At room temperature, the germanium diode D1 has a typical back resistance of 10K ohm. At this value, the base of transistor Q1 is turned ON, causing transistor Q2 to turn ON as well. When this happens, the base of transistor Q3 is kept to ground cau ....etc

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please help me with the project report on the sensitive clap switch using op amp. i have already built the circuit and it works well. ....etc

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Touch the sensor of the alarm with your finger and it starts beeping, goes on for some time and then stops. Touching it again, and it goes again! This little and flexible circuit consists of a touch sensor and a directly coupled transistor amplifier with a small loudspeaker as the output load. Two sensor strips of metal are mounted side by side on a 1 1 cm size micasheet and connected to the input of the circuit.

How the touch alarm works

Under normal conditions no current flows through switching transistors T1 and T2 and the potential acros ....etc

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sir,
i have made the project but my ckt is not tripping , will changing the rating of potentio meter will do any work. ....etc

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To get full information or details of light sensitive switch please have a look on the pages

http://seminarsprojects.net/Thread-light-sensitive-alarm?pid=26008&mode=threaded

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

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I study in 12th Sci. So I want Project report for Vegakit light sensitive switch ....etc

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To get full information or details of touch less touch screen please have a look on the pages

http://seminarsprojects.net/Thread-touch-less-touchscreen-user-interface

http://seminarsprojects.net/Thread-touch-less-touchscreen-user-interface-ppt

http://seminarsprojects.net/Thread-hp-s-touchless-touchscreen-wall?pid=65138#pid65138

if you again feel trouble on touch less touch screen please reply in that page and ask specific fields in touch less touch screen ....etc

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ABSTRACT
This research focuses on detection of unauthorized access to residential and commercial buildings when
the residents are far away from the access gate of the house. The system is a simple and reliable touch
activated security system and uses sensor technology to revolutionize the standards of living. The system
provides a best solution to most of the problems faced by house owners in their daily life. Due to its
simple electronic components nature, it is more adaptable and cost-effective. The system is divided into
three units; t ....etc

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i need a ppt on touch sensitive switch with minimum 15 slides ....etc

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ADVANTAGES OF TOUCH SENSITIVE SIREN AND DETAILS OF CIRCUIT DIAGRAM, WORKING , REQUIREMENTS , APPLICATIONS
....etc

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