## What is Relay and How it Works?

A relay is just a simple switch with an electromagnet use to change the state of switch. As other switches come into types like SPST, SPDT, DPDT etc, in the same way relay has types like these switches. Moreover as they have electromagnet/current carrying coil inside with the addition of simple switch that’s why its […]

## Random Number Generator (Gambling Game)

Introduction: This is a game which you can play with your friends for entertainment or to earn money during fun times. Random number generator based game which uses flip flop circuits using 555 timer I.C, 4033B counter I.C and seven segment display. It is a gambling game having three displays of numbers and in which […]

## Hardware Implementation of Transformer Step by Step

In following few paragraphs we are going to make a transformer in hardware in few easiest steps. Each Step is explained in simplest way with the help of images. For better understandings make sure you have knowledge of basics of transformer and How to calculate design parameters of transformer. It is recommended to have a view of […]

## Calculations for Design Parameters of Transformer

For Quick review and summary of Calculations, see the tables at the end of this article. (Table 1) (Table 2) For better understandings, go through the following steps for calculations Make sure you have knowledge of Basics of Transfomer Design Parameters For designing a transformer, we need: Power rating Voltage levels (primary and secondary) Currents on both […]

## Speed Control of Fan using GSM Interfaced with Atmel AVR Microcontrollers

There are many methods to control the speed of fan. I will use simple method through timer of Atmel AVR Microcontrollers. But keep in mind that this project is little bit advance level project. If you don’t have the idea of GSM then read these articles first. Basics of GSM module LED control using GSM […]

## AC Voltage Measurement using ATmega8

There are many different methods to measure the voltage. But I will give you a method through which you can do this job just like 1 2 3. You just have some idea of ADC’s of micro-controller. 1.  Step down the AC voltage 2. Convert the AC voltage into DC 3. Give it to micro-controller […]