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Engineering Projects For You
Free electronics projects, circuit diagrams and software codes available for students and hobbyists. Complete instructions on DIY electronic devices also available. These projects have been tested by EFY and are available with source codes. These are helpful with understanding concepts of electronics including basic components. The projects are designed to be helpful for engineering students and professionals building their own designs and circuits. The projects are also compiled from time to time to provide a single destination for project junkies. Let us know how you feel about the content and any thing you would like us to cover in the future. We hope you enjoy the content on this page!
Dual Universal Hardware Driver for Embedded Systems
Introduction
The 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...
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...
Low Cost High Impedance Buffers for Oscilloscopes and Voltmeters
Most of the low cost digital oscilloscopes and voltmeters have input resistance around 1 MOhm and input capacitance around 100pF. But in many case...
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...
Bipolar Power Supply with LM317T and with LM337T Controllable with Stereo Potentiometer
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...
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...
Simple Audio Power Amplifier With NE5534/А And Darlington Transistors With Up To 30W Of Output Power
These days there a lot of audio power amplifiers in integrated circuits (ICs). But it is still interesting to produce audio power amplifiers with...
Simple Low-Noise Audio Distribution Amplifier
This article describes a low-cost low noise audio distribution amplifier based on hybrid or mixed technology. Input to the amplifier is from low-noise, high-gain npn...
Multifunction Rechargeable Clock
Building clocks are one of the interesting and easiest projects that can be seen among hobbyists and makers. Presented here is a multifunction rechargeable...
Clock Generator Using Verilog
Presented here is a clock generator design using Verilog that is simulated using ModelSim software. A clock generator is a circuit that produces a...
Daytime Running Lights Controller
Auto makers have been gradually switching to light emitting diode (LED) lighting for automotive headlamps because of its features such as high efficiency and...
Anti-Theft Alarm for Vehicles
This simple and inexpensive anti-theft alarm circuit for vehicles sounds an alarm simulating a police siren whenever someone attempts theft of your vehicle. The...
Electromagnetic Compatibility: Multi-Layer PCB Designing (Part 2 of 5)
In the first part we touched base on multi-layer PCB design. In this part we discuss more about the same.
Multi-layer board and high-speed PCB...
Low Cost Dual Channel Active AC Analog Probe
Introduction
When we are experimenting with AM receivers for LW, MW and SW we are in need of high impedance analog probe with low input...
LM1875 Based Simple Amplifier
LM1875 is a low cost and very popular and useful integrated circuit (IC). It is designed to be stable with gain higher than ten....
How Application-Specific Development Boards Help Designers
Using development boards to design a device makes the job simpler. While selecting the board, go for one that requires minimum changes for your...
Controlling RGB LEDs To Get Million Colors In Your Pocket!
Many modern lighting applications need millions of colors. That is why we are finding RGB (Red Green Blue) LEDs all around us - in...
Transistorized Microphone Preamplifier With Band Pass Filter
Introduction
The signal from most of the microphones should be amplified before to be send to the interconnection cables.
In order to reduce the noise of...