Power Line Communication

PLC (Power Line Communication) is the technology that allows data transmission over the existing Power Line network. Power Line can be the home power network or the national electricity transmission grid. The data that can be transferred is as diverse as its speed. With speeds of nearly 200Mbps, video transmission, voice, data and any other services can be transmitted successfully. On this article i'm going ...

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Bypass Capacitors – Why and How to Use Them?

You may have heard about the phenomenon of bypassing in circuits, however, we may not have sufficient knowledge of how to apply this technique in real circuits. In this tutorial, we will discuss about the bypass capacitors, why we need to use and how to use these capacitors in circuits. What is a Bypass Capacitor? A capacitor that filters out the AC signal removing the noise and provides a DC signal is know ...

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Convert 1 to 5V signal to 4- to 20-mA output

Despite the long-predicted demise of the 4- to 20-mA current loop, this analog interface is still the most common method of connecting current-loop sources to a sensing circuit. This interface requires the conversion of a voltage signal—typically, 1 to 5V—to a 4- to 20-mA output. Stringent accuracy requirements dictate the use of either expensive precision resistors or a trimming potentiometer to calibrate ...

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Building a self balancing bot

I bought most of the parts to built a self balancing bot many months ago. This time I didn’t use cheap Chinese stuff. I actually bought Pololu parts from a local shop. Pololu has a nice range of motors and motor controllers. I wanted to keep the bot small so I used the micro metal gear motors with 2 matching 60mm wheels. I did go for the most powerful version of the micro metal gear motors. To control the m ...

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Automatic School Bell

This project is an Automatic School bell system. Such a system triggers a bell (or operates any other load) at predifined time. In this version some advanced features are introduced: - 16x2 LCD Display ( Displays current date, time and day) - 4x4 Keypad for Inputs - Stand alone product ( no PC required to program or maintain ringing schedule)   - No battery required to maintain clock and ringing schedu ...

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FM Transmitter using MAX4467 & MAX2606

Here is a very simple, inexpensive and interesting project which provides lot of fun to a home experimenter or hobbyist. This simple transmitter can transmit speech over a short range. It can be used as a simple cordless microphone. The circuit uses two integrated circuits from Maxim. IC1 a MAX4467, is an amplifier raising the microphone signal to a level suitable for frequency modulation (FM). IC2 is a vol ...

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LiFi Ready to Go with LED

In 2011 Prof. Harald Haas (pictured) of the University of Edinburgh demonstrated streaming a hi-def video signal using a light beam as a transmission medium. He went on to explain how this technology might be used to address the growing paucity of free RF bandwidth and suggested that domestic LED lamps may in future provide an internet access point, once the necessary control electronics to modulate the lig ...

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Low Power NTSC/PAL/SECAM Video Decoder with Differential CVBS Inputs

Key Features Video Decoder NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination), PAL (60), SECAM support with automatic format detection Software selectable analog input control allows for combinations of single ended CVBS, differential CVBS, and S-Video Built-in analog anti-alias filter Two 10-bit ADCs and analog clamping circuit Fully programmable static gain or automatic gain control for the Y cha ...

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NEC Protocol IR (Infrared) Remote Control With a Microcontroller

Introduction  This little project will demonstrate how you can build NEC protocol based Infrared Remote Control to use with various NEC Protocol IR receivers. actually there are lots of projects out there to accomplish this task but i have to write my own code because of too many requests on this IR(infrared) Remote Control Relay Board with PIC 12F675 Microcontroller   people keep asking "Where is the Trans ...

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