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Title: PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS
Page Link: PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS -
Posted By: computer science crazy
Created at: Friday 17th of April 2009 08:55:58 PM
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PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS

Like diodes, all transistors are light-sensitive. Phototransistors are designed specifically to take advantage of this fact .the most-common variant is an NPN bipolar transistor with an exposed base region. Here, light striking the base Replaces what would ordinarily be voltage applied to the base “ so, a photo- transistor amplifies variations in the light striking it. Phototransistors may or may not have a base lead . (if they do, the base lead allows us to bias the phototransis ....etc

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Title: WIRELESS SWITCH
Page Link: WIRELESS SWITCH -
Posted By: smart paper boy
Created at: Wednesday 22nd of June 2011 05:32:34 PM
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Normally, home appliances are controlled by means of switches, sensors, etc. However, physical contact with switches may be dangerous if there is any shorting. The circuit described here requires no physical contact for operating the appliance. You just need to move your hand between the infrared LED (IR LED1) and the phototransistor (T1). The infrared rays transmitted by IR LED1 is detected by the phototransistor to activate the hidden lock, flush system, hand dryer or else. This circuit is very stable and sensitive compared to other AC appli ....etc

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Title: PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS
Page Link: PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS -
Posted By: computer science crazy
Created at: Friday 17th of April 2009 08:55:58 PM
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PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS

Like diodes, all transistors are light-sensitive. Phototransistors are designed specifically to take advantage of this fact .the most-common variant is an NPN bipolar transistor with an exposed base region. Here, light striking the base Replaces what would ordinarily be voltage applied to the base “ so, a photo- transistor amplifies variations in the light striking it. Phototransistors may or may not have a base lead . (if they do, the base lead allows us to bias the phototransis ....etc

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Title: IR-BASED VOICE TRANSMITTER AND RECEIVER
Page Link: IR-BASED VOICE TRANSMITTER AND RECEIVER -
Posted By: project report helper
Created at: Tuesday 19th of October 2010 02:30:19 PM
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IR-BASED VOICE TRANSMITTER AND RECEIVER


INTRODUCTION:

IR-BASED VOICE TRANSMITTER AND RECEIVER, the aim of the project is to communicate wirelessly. In this project we are using various transistors, LED, op-amp etc. and we made a detailed study on this so as to effectively use them in our project.

1.1 OBJECTIVE OF THE PROJECT: -
The aim of the project is to communicate between any 2 distant places wirelessly which are at a distance of 5meters apart. The distance can be improve ....etc

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Title: WIRELESS SWITCH
Page Link: WIRELESS SWITCH -
Posted By: project uploader
Created at: Friday 03rd of February 2012 06:21:31 PM
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WIRELESS SWITCH

Normally, home appliances are
controlled by means of switches,
sensors, etc. However,
physical contact with switches may be
dangerous if there is any shorting.
The circuit described here requires
no physical contact for operating the
appliance. You just need to move
your hand between the infrared LED
(IR LED1) and the phototransistor
(T1). The infrared rays transmitted by
IR LED1 is detected by the phototransistor
to activate the hidden lock, flush
system, hand dryer or else.
This circuit is very s ....etc

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Title: construction and working of phototransistor
Page Link: construction and working of phototransistor -
Posted By:
Created at: Wednesday 30th of January 2013 10:24:54 PM
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Please give me the answer for construction and working of photo transistor and its features
....etc

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Title: LASER TORCH BASED VOICE TRANSMITTER AND RECEIVER full report
Page Link: LASER TORCH BASED VOICE TRANSMITTER AND RECEIVER full report -
Posted By: project topics
Created at: Saturday 10th of April 2010 11:41:07 PM
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LASER TORCH BASED VOICE TRANSMITTER AND RECEIVER
Using this circuit you can communicate with your neighbors wirelessly. Instead of RF signals, light from a laser torch is used as the carrier in the circuit. The laser torch can transmit light up to a distance of about 500 meters. The phototransistor of the receiver must be accurately oriented towards the laser beam from the torch. If there is any obstruction in the path of the laser beam, no sound will be heard from the receiver. The transmitter circuit (Fig. 1) comprises c ....etc

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Title: advantage and disadvantages of phototransistor pdf
Page Link: advantage and disadvantages of phototransistor pdf -
Posted By:
Created at: Thursday 14th of December 2017 11:17:50 PM
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advantage and disadvantages of phototransistor pdf ....etc

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Title: source code bidirectional visitor counter using ldr
Page Link: source code bidirectional visitor counter using ldr -
Posted By:
Created at: Thursday 27th of April 2017 08:15:22 PM
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bidirectional visitor counter using ldr in this blank  ....etc

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Title: abstract for wireless switch using ic ca3140
Page Link: abstract for wireless switch using ic ca3140 -
Posted By:
Created at: Sunday 01st of March 2015 03:59:00 PM
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plz send me the abstract for wireless switch in efy magazine using op amp and phototransistor? ....etc

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Title: Petrogasoline purity tester
Page Link: Petrogasoline purity tester -
Posted By: seminarsense
Created at: Wednesday 17th of November 2010 12:38:49 AM
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CONTENTS

1. INTRODUCTION……………..……………………………………………………. 2
2. BLOCK DIAGRAM………………………………………………………………… 4
3. BLOCK DESCRIPTION…….……………………………………………………...5
4. THEORY & PRINCIPLE OF OPERATION…. ………………………………….6
5. CIRCUIT DIAGRAM………..……………………………………………………. 8
6. CIRCUIT DESCRIPTION……� ....etc

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Title: Petrogasoline purity tester
Page Link: Petrogasoline purity tester -
Posted By: seminarsense
Created at: Wednesday 17th of November 2010 12:38:23 AM
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CONTENTS

1. INTRODUCTION……………..……………………………………………………. 2
2. BLOCK DIAGRAM………………………………………………………………… 4
3. BLOCK DESCRIPTION…….……………………………………………………...5
4. THEORY & PRINCIPLE OF OPERATION…. ………………………………….6
5. CIRCUIT DIAGRAM………..……………………………………………………. 8
6. CIRCUIT DESCRIPTION…… ....etc

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Title: advantage and disadvantages of phototransistor pdf
Page Link: advantage and disadvantages of phototransistor pdf -
Posted By:
Created at: Thursday 14th of December 2017 11:17:50 PM
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advantage and disadvantages of phototransistor pdf ....etc

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Title: working of l14f1 phototransistor as switch
Page Link: working of l14f1 phototransistor as switch -
Posted By:
Created at: Wednesday 17th of January 2018 05:35:31 PM
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Suggest correct circuit
How to construct the circuit with l14f1 so that iT operate as switch ....etc

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