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Intermediate Projects

Solid State Voltage Stabiliser

In India, we have a large power distribution system with heavy distribution losses and variations in industrial/ domestic load. This results in voltage variations...

Electronic Dice Using AT89C2051

This simple AT89C2051 based electronic dice circuit demonstrates the capability of an AT89C2051 microcontroller chip to function as a random number generator based on...

Parallel-Port Controller Using MATLAB

Many projects have been published in EFY on how to program a PC’s parallel port using C, C++ and Visual Basic. Here we attempt...

Stereo Brick Amplifier

If you are looking for a compact and inexpensive add-on audio amplifier for your digital surround sound system or computer, then this subwoofer amplifier...

Ball Speed Checker

This ball speed checker circuit measures the speed of a cricket ball based on the time taken by the ball to travel the distance...

Four Stage FM Transmitter

This four stage FM transmitter circuit uses four radio frequency stages: a VHF oscillator built around transistor BF494 (T1), a preamplifier built around transistor...

Three Phase Appliance Protector

Many of our costly appliances require three-phase AC supply for operation. Failure of any of the phases makes the appliance prone to erratic functioning...

Power Resumption Alarm and Low Voltage Protector

The low voltage protector circuit described here protects your electrical appliances like AC motors from damage due to low voltage at power-on. It remains...

PC Timer

Primarily intended for installation into a desktop PC, this versatile PC timer with adjustable time output provides controlled ‘on’ time for PC peripherals like...

Multipurpose Power Pulser

The idea behind this multipurpose power pulser is very simple. As shown in the circuit (Fig. 1), it uses a low-frequency oscillator to drive...

Password-Protected Bluetooth Remote Control

This password protected bluetooth based remote control operating at 2.4GHz frequency can be used to control robots, home appliances, machines, etc. Here we have...

Simple 8-Bit Computer for Learning

This project helps you build a 8-Bit computer while also providing an insight into the working of an MPU & its construction mechanism. Computers take...

DC Motor Starter Using Arduino Uno Board

Motor starter reduces the load, torque and current surge of a motor during startup. On starting, the motor takes more than five times the...

Arduino Ping Pong Game

Ping Pong was the first ever video game that reached mass market. For the first time in history, the concept of a “video game”...

Web Server using Raspberry Pi 2

Raspberry Pi is a small credit-card sized computer capable of performing various functionalities. It is heavily used in surveillance systems, military applications, etc. Several...

High Fidelity FM Transmitter

FM broadcasting is radio broadcasting using frequency modulation technology. In order to attain high-fidelity broadcast of music and speech, all audio frequencies up to...

PC Based Stepper Motor Controller

This PC based stepper motor controller is perhaps the cheapest, smallest and simplest. A pair of H-bridges with a software program written in ‘C++’...

Multicell Charger

Using this multicell charger, you can safely charge up to two pieces of Ni-Cd cells or Ni-MH cells. The circuit is compact, inexpensive and...
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