ELECTRONICS EVERYDAY

Metal Detector

noreply@blogger.com (Sabarish) — Fri, 25 Nov 2011 18:15:00 +0000

It's a simple metal detector design that has the quite good characteristics. the principle of operation which one differs from the classic schemes (BFO, transmit-receive known as "two-boxes" metal...

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Mobile phone call indicator

noreply@blogger.com (Sabarish) — Fri, 25 Nov 2011 17:08:00 +0000

Purpose This circuit can be used to escape from the nuisance of mobile phone rings when you are at home. This circuit will give a visual indication if placed near a mobile phone even if the...

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HOW SOLAR CELLS WORK

noreply@blogger.com (Sabarish) — Sat, 19 Nov 2011 14:41:00 +0000

SOLAR CELLS, How They Work The solar cell offers a limitless and environmentally friendly source of electricity. The solar cell, is able to create electricity directly from photons....

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Operational Amplifier

noreply@blogger.com (Sabarish) — Fri, 17 Jun 2011 18:15:00 +0000

OPAMP The operational amplifier is arguably the most useful single device in analog electronic circuitry. With only a handful of external components, it can be made to perform a wide...

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Thin Film Transistor

noreply@blogger.com (Sabarish) — Mon, 13 Jun 2011 17:47:00 +0000

TFT The TFTs in active-matrix LCD act as simple ON/OFF switches, at different speeds which depend on the refresh rate of the LCD, for example 60Hz. Figure 1 shows a simple structure...

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RF based REMOTE CONTROL

noreply@blogger.com (Sabarish) — Tue, 07 Jun 2011 08:54:00 +0000

Introduction:- The rf transmitter a gadget that disseminates radio waves with the help of an antenna. A rf transmitter...

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noreply@blogger.com (Sabarish) — Sun, 05 Jun 2011 19:36:00 +0000

What is RFID RFID stands for Radio-Frequency IDentification. The acronym refers to small electronic devices that consist of a small chip and an antenna. The chip typically is capable of...

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Countdown Timer using 555 Timer

noreply@blogger.com (Sabarish) — Sat, 10 Oct 2009 17:13:00 +0000

Countdown Timer:- In this Countdown Timer project, a 555 IC, a counter IC and a transistor switch to activate a relay either ON/OFF (mode selected by a jumper) as soon as the counting period is over....

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MOSFET

noreply@blogger.com (Sabarish) — Sun, 27 Sep 2009 12:48:00 +0000

Introduction:- The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a device used to amplify or switch electronic signals. The basic principle of the device was...

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JFET

noreply@blogger.com (Sabarish) — Mon, 21 Sep 2009 12:13:00 +0000

INTRODUCTION:- The junction gate field-effect transistor (JFET or JUGFET) is the simplest type of field effect transister. It can be used as an electrically-controlled switch or as a...

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COMMON COLLECTOR CONFIGURATION

noreply@blogger.com (Sabarish) — Mon, 21 Sep 2009 12:03:00 +0000

INTRODUCTION:- The COMMON-COLLECTOR CONFIGURATION (CC) is used as a current driver forimpedance matching and is particularly useful in switching circuits. The CC is also referred to as...

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COMMON BASE CONFIGURATION

noreply@blogger.com (Sabarish) — Mon, 21 Sep 2009 11:58:00 +0000

Introduction:- The COMMON-EMITTER CONFIGURATION (CE) is the most frequently used configurationin practical amplifier circuits, since it provides good voltage, current, and power gain. The input to...

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Silicon-controlled rectifier

noreply@blogger.com (Sabarish) — Mon, 21 Sep 2009 08:06:00 +0000

INTRODUCTION:- A silicon-controlled rectifier (or semiconductor-controlled rectifier) is a four-layer solid state device that controls current. The name "silicon controlled rectifier" or SCR is...

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Transistor codes..

noreply@blogger.com (Sabarish) — Sun, 20 Sep 2009 17:08:00 +0000

NPN transistorsCodeStructureCase styleIC max.VCE max.hFE min.Ptot max.Category (typical use)Possible substitutesBC107NPNTO18100mA45V110300mWAudio, low powerBC182...

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Field Effect transister (FET)

noreply@blogger.com (Sabarish) — Sun, 20 Sep 2009 07:55:00 +0000

Introduction:-A field-effect transistor (FET) is a type of transister commonly used for weak-signal amplification (for example, for amplifying wireless signals).The device can amplify analog or...

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Bipolar Junction Transistor

noreply@blogger.com (Sabarish) — Sat, 19 Sep 2009 18:34:00 +0000

INTRODUCTION:- simple diodes are made up from two pieces of semiconductor material, either Silicon or Geranium to form a simple PN-junction and we also learnt about their properties and...

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Unijunction Transistor

noreply@blogger.com (Sabarish) — Sat, 19 Sep 2009 18:05:00 +0000

INTRODUCTION:- The basic structure of a unijunction transistor (UJT) is shown in Fig.1. It is essentially a bar of N type semiconductor material into which P type material has...

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COMMON EMITTER CONFIUGRATION

noreply@blogger.com (Sabarish) — Sat, 19 Sep 2009 16:53:00 +0000

INTRODUCTION.. The COMMON-EMITTER CONFIGURATION (CE) is the most frequently used configuration in practical amplifier circuits, since it provides good voltage, current, and power gain. The input to...

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Norton's Theorem

noreply@blogger.com (Sabarish) — Thu, 03 Sep 2009 16:13:00 +0000

Norton's Theorem In some ways Norton's Theorem can be thought of as the opposite to "Thevenins Theorem", in that Thevenin reduces his circuit down to a single resistance in series with a single...

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Thevenins Theorem

noreply@blogger.com (Sabarish) — Thu, 03 Sep 2009 15:29:00 +0000

Thevenins Theorem states that "Any linear circuit containing several voltages and resistances can be replaced by just a Single Voltage in series with a Single Resistor". In other words, it is ...

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SR Flip Flop

noreply@blogger.com (Sabarish) — Wed, 02 Sep 2009 15:12:00 +0000

An SR Flip-Flop can be considered as a basic one-bit memory device that has two inputs, one which will "SET" the device and another which will "RESET" the device back to its original state and an...

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Superposition Theorem

noreply@blogger.com (Sabarish) — Sun, 30 Aug 2009 13:37:00 +0000

Superposition Theorem Superposition theorem is one of those strokes of genius that takes a complex subject and simplifies it in a way that makes perfect sense. The strategy used in the...

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Multiplexer

noreply@blogger.com (Sabarish) — Sat, 29 Aug 2009 16:22:00 +0000

IntroductionMultiplexers are used in building digital semiconductor such as CPUs and graphics controllers. In these applications, the number of inputs is generally a multiple of 2 (2, 4, 8, 16,...

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K-Map Minimising

noreply@blogger.com (Sabarish) — Fri, 28 Aug 2009 16:16:00 +0000

Software to evaluate K-Map This is a software to minimize a k-map using graphical interface and it can solve k-maps from 3-8 variables. Click for better Quality... Click the download button to...

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K-Map

noreply@blogger.com (Sabarish) — Thu, 27 Aug 2009 16:06:00 +0000

Karnaugh Map (K-Map) A Karnaugh Map is a method of mapping truth tables onto a matrix that identifies places where two or more different combination of the input variables yield the same result. In...

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