Engineering Projects For You

Engineering Projects For You

Free engineering project ideas, circuit diagrams and software codes for students and hobbyists. Complete instructions on DIY electronic devices. EFY tested circuits with source codes.

Designing An Accurate Temperature-Monitoring System

Modern electronic systems use sensors to monitor parameters like temperature and provide protection from excessive temperature excursions with good accuracies, reasonable costs and often with low power consumption. For instance, expensive...

Wi-Fi Controlled Robot Using Arduino UNO And Blynk

Control your Robot from anywhere using the ARMA IoT shield for UNO and the Blynk App which provides the user interface.Overview Simple WiFi Controlled Robot Using ARMA IoT and Blynk!This project uses...

Time-Lapse Photography With Raspberry Pi 3

This project aims at developing a simple time-lapse photography device with Raspberry Pi 3 and Pi camera.To get the most out of nature without tiring yourself, time-lapse photography is the best...

Converting the Stereo Audio Distribution Buffer into Stereo Audio Distribution Amplifier

The stereo audio distribution buffer published on page 94 of July 2013 Edition of EFY can be converted easily into stereo audio distribution amplifier.That will add gain and will give new...

Dual Universal Hardware Driver for Embedded Systems

IntroductionThe embedded systems should drive different peripheral devices requiring significant electrical power.A typical case is the DC motors, operating from 6V, 12V and 24V.These motors may require up to 3A average...

Electromagnetic Compatibility: Grounding (Part 3 of 5)

In the previous parts we covered multi-layer PCB designing. Now, let us look at grounding or earthing. Grounding can be defined as a connection, whether intentional or accidental, between an electrical circuit...

Low cost High Impedance Buffers for Oscilloscopes and Voltmeters

Introduction Most of the low cost digital oscilloscopes and voltmeters have input resistance around 1MOhm and input capacitance around 100pF.But in many case we are in need of input resistance above 10MOhm...

Two-Watt TBA820M AF Amplifier

Here is a simple AF amplifier project based on TBA820M IC. This amplifier can deliver two-watt output power with 8-ohm speaker using a 12V power supply. A 3-16V battery or an AC/DC...

Bipolar Power Supply with LM317T and with LM337T Controllable with Stereo Potentiometer

Introduction LM317T and LM337T are well known and low cost adjustable voltage regulators with current limiting up to around 1.5A and power dissipation up to around 20W.It is useful to have bipolar...

Wireless-Powered LED

Wireless power is transferred from transmitter to receiver coil using inductive coupling principle. For wireless power transfer to work efficiently, frequency of the transmitter and the receiver must be tuned to...

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Simple Prototyping Platform

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Optical Smoke Alarm

This optical smoke alarm (Fig. 1) is built around opto-interrupter MOC7811 (IC1) and dual op-amp LM358 (IC2).When...

How Internet of Things (IoT) revolution is changing the Telecom Landscape

Telecommunication is most commonly associated with inventions such as the telephone, fax machine, emails, and radio; essentially...