To get full information or details of transistor intercom circuit ppt please have a look on the pages

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intercom using ic lm386 working principle

In this doorphone circuit,an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good voltage gain , whilst providing a low impedance input to match the speaker. Self DC bias is used allowing for variations in transistor current gain. An LM386 is used in non-inverting mode as a power amplifier to boost voltage gain and drive the 8 ohm speaker. The 10k potentiometer acts as the volume control, and overall gain may be adjusted using ....etc

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INTRODUCTION
1.1 EMBEDDED SYSTEM
An embedded system is a special-purpose computer system designed to perform a dedicated function. Unlike a general-purpose computer, such as a personal computer, an embedded system performs one or a few pre-defined tasks, usually with very specific requirements. Since the system is dedicated to specific tasks, design engineers can optimize it, reducing the size and cost of the product. Embedded system comprises of both hardware and software. Embedded system is fast growing technology ....etc

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Description.

Here is a simple but effective intercom circuit that is completely based on transistors. The circuit is based on a three stage RC coupled amplifier. When the pushbutton S2 is pressed, the amplifier circuit wired around T1 & T2 becomes an astable multivibrator and begins to produce the call signals. These call signals will be amplified by the transistor T3 to drive the speaker. When the S2 button is released, the circuit will behave like an ordinary amplifier and you can talk to the other side through it.

To construct a ....etc

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To get full information or details of transistor intercom circuit please have a look on the pages

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abstract

as technology advances in society the need for wired and wireless networking has become essential. each of these types of networking has their advantages and disadvantages according to security. wired networking has different hardware requirements and the range and benefits are different. wireless networking takes into consideration the range, mobility, and the several types of hardware components needed to establish a wireless network. as you read on you will understand different types of configurations of networks and the security ....etc

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to get information about the topicDESIGN AND CONSTRUCTION OF A TWO WAY WIRED INTERCOM refer the page link bellow

http://seminarsprojects.net/Thread-design-and-construction-of-a-two-%E2%80%93-way-wired-intercom ....etc

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To get information about two way intercom refer the links below

http://seminarsprojects.net/Thread-design-and-construction-of-a-two-%E2%80%93-way-wired-intercom

http://seminarsprojects.net/Thread-two-way-intercom-project-report-pdf ....etc

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Whats ZigBee
ZigBee is the set of specs built around the IEE 802.15.4 wireless protocol. The IEE is the Institute of Electrical and Electronics Engineers. They are a non-profit organization dedicated to furthering technology involving electronics and electronic devices. The 802 group is the section of the IEE involved in network operations and technologies, including mid-sized networks and local networks. Group 15 deals specifically with wireless networking technologies, and includes the now ubiquitous 802.15.1 working gr ....etc

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i want detailed working principle of intercom circuit for my 3rd sem electronics project plz mail to [email protected]..

sohil parikh ....etc

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