Laser Communication System

PCB Layout of Laser Transmitter Friday, October 5th, 2012  »  Posted By  »  Total 4 Comments

ABSTRACT: Laser Communication System works on the principle of “Amplitude Modulation” process. In this the amplitude of the carrier is varied according to the instantaneous amplitude of the modulating signal (Input Signal ). Here,“Carrier Signal refers to Laser  Beam”“Amplitude refers to Intensity of Laser Beam”“Input Signal refers to audio signal” Hence, The intensity of the […]

Wireless Data Transmission between Computers using Sequence Detector

Wireless transmission block diagram Sunday, March 28th, 2010  »  Posted By  »  Total 22 Comments

ABSTRACT Here for the purpose, we have made four distinct stages for the effective implementation .The stages are described in brief as follows. In the first stage, we are constructing the transmitter circuit that transmits data and sequence bits at infrared frequency. Now the second part is to develop receiver circuit that receives infrared signals […]

Automatic solar tracking system

Automatic solar tracking system Friday, January 29th, 2010  »  Posted By  »  Total 116 Comments

AUTOMATIC SOLAR TRACKER starts following the SUN right from dawn, throughout the day, till evening, and starts all over again from dawn next day. On cloudy weathers, it remains still and catches the SUN again as it slips out of clouds. It does all this automatically, employs cheap and inexpensive components, and is very accurate.Let […]

10W Audio Amplifiers

10W Audio Amplifiers Saturday, October 10th, 2009  »  Posted By  »  Total 6 Comments

Introduction:  Amplifier device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has larger amplitude. The input signal may be a current, a voltage, a mechanical motion, or any other signal; the output signal is usually of the same nature. The most common […]

“JavaBot” LINE FOLLOWER ROBOT from Java, Indonesia

“JavaBot”  LINE FOLLOWER ROBOT from Java, Indonesia Tuesday, August 18th, 2009  »  Posted By  »  Total 73 Comments

I have designed it just for fun and it’s my 1st Line Follower Robot . First I want to know how the line sensor work. Finally I spent only USD $ 6-7  to build the robot. There is no MicroController so we do not need to programm. I just used comparator IC using LM339, two H-bridge […]

Device control using Telephone

Device control using Telephone Wednesday, November 5th, 2008  »  Posted By  »  Total 149 Comments

Controlling devices using switches are common. From  a   few   decades  controlling devices using    remote  control   switches like infrared remote control  switch,  wireless remote control  switches,  light   activated  switches  re becoming popular. But these  technologies  have their own limitations. Laser beams are harmful to mankind. Some  technologies  like  IR  remote control are used for short distance  […]

Electronic house

1 Tuesday, November 4th, 2008  »  Posted By  »  Total 135 Comments

Abstract : To develop security system for houses and to save electric  power. Scope : This project proposes the development of security system for farm houses and residential houses. In an extremely mechanized world such as today’s it is necessary to make our life better, convertible and economical. This is the purpose for which the […]

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