3D Printing

2015 Best 3D Printers Guide

"In this guide you�ll be able to find the top Printers for 5 different categories: Enthusiast Printers, Plug-n-Play Printers, Kit/DIY Printers, Budget Printers, and last but not least Resin Printers. In total 18 models made it to the top of our communities� list. With reliability in mind, only printers with more than 10 reviews are included in the guide."

3D Printer Filament Comparison Guide

Choose the right type of filament for your project.

Find a 3D Printer Near You

Have a design in mind but don't own a printer? 3DHubs makes it easy to find a printer near you that will print your design for a one time price.

Look at our offerings

We stock 3D printers for any beginner looking to learn more about 3D printing without the price tag of a high capacity printer.

Basic Electronics


History of the transistor. Also includes a Teacher's Guide. Sponsored by PBS

Every Circuit

Two million users bring circuits to life with EveryCircuit's interactive visual circuit simulation

Scot's Guide to Electronics

Scot's Guide to Electronics is designed to help you learn about components, circuits, and the use of electronics. You can explore the contents in whatever order you wish. The emphasis is on providing information starting at the 'absolute beginners' level.

The Electronics Workshop

An introduction to electronics Also, tutorials giving important physics and chemistry concepts related to the field of electronics. Also, An encyclopedia of electronics with numerous reference tables.


Electrical and Electronic Bulletin System

Bulletin system for professionals and vendors in the electrical and electronic industry. Free to use. TOPICS: Help Wanted - some technical questions, can anyone give me info? Ask The Expert - meet key people in the industry or make your own industry presence known. Marketplace(B to B, B to C) - new product announcement, trade leads. Marketplace(C to C) - exchange of individuals, used or surplus stuff, no business ad please. Manufacturers and Reps/Agents - a place where manufacturers and reps/agents meet. Used Machinery/Equipment - of electrical manufacturing Misc. Bulletin Board

All About Circuits Forum


All About Circuits

Vol. I - Basic Concepts; Vol. II - AC; Vol. III - Semiconductors; Vol IV - Digital; Vol. V - Reference; Vol. VI - Experiments

delabs circuits

Electronic circuits and technical documents. There are many free circuits, tutorials, links and ideas

Circuit Design Lab

Circuit Design Lab consists of several Java applets, each providing an opportunity to experiment with the design of a particular circuit.

Animated Circuit Simulator

Visualize (animate) the emulation of electronic circuit. The user will not just see the numbers, but also the node's voltage growing up and down by moving of the node itself on the circuit. The changes of current are shown by ammeter width, and other elements' states also can be seen by changing of the element itself, like a FET in Cut-Off state looks broken.

Digital Circuit Builder

Assign an equivalence between a mathematical value and an electrical charge.

Electronics Zone

"This site contains thousands of electronics circuits and do-it-yourself circuits for hobbyists, students,professionals etc. relating to a wide range of categories like audio,music,home/garden related,computer hardware,radio,robotics etc to name a few. "

Circuits in the Circuits Archive

Includes Ascii Circuit Diagrams, Radio-related Circuits, Computer-related Circuits, Audio/Music Circuits, Telephone Related Circuits. Sponsored by the University of Washington Electrical Engineering Department.

Digital Music Zone

This web site features a selection of schematics for guitar effects, electronic circuits, and recording tips and techniques for the amateur and professional alike.

Telephone-related ASCII Schematics V1.01


Test and Measurement World

Articles, reference, software, and product info.

Planet Analog

News, columns, product reviews. Can subscribe to the Analog and Mixed Signal eNewsletter!

The Technology Interface

"On-line journal for the Engineering Technology profession serving education and industry. The Technology Interface has been developed to provide professionals in the Engineering Technology profession and related fields, the opportunity to share ideas concerning teaching, teaching improvements, projects, industrial activities, research and much more via the internet."


Pinouts for various connectors in Real Life™ INDEX


Electrical Engineering Reference

Many links to Electronics basics and electrical engineering reference material

Electronic Definitions And Terms

Large list of electronic definitions

Electronics Lab

Links to articles, downloads, projects and an online community.


The Ants: A Community of Microrobots

The Ants are a community of cubic-inch microrobots at the MIT Artificial Intelligence Lab.


ExpressPCB Layout Software

"The ExpressPCB Windows layout software makes designing PC boards simple for the beginner and efficient for the professional. Its standard Windows user interface uses all the familiar commands such as copy, cut, paste and dragging. Completely free!"

Oscilloscope for Windows

Windows application that converts your PC into a powerful dual-trace oscilloscope. Oscilloscope is free for personal use. Software written by Konstantin Zeldovich.


SMPS Power Supplies

Includes articles about SMPS Design and SMPS Simulation

XYZ of Oscilloscopes

A Primer

Application Training Guide

Includes Basic Circuit Theory; Basic Semiconductor Theory; Device Cross Section; Mounting Techniques; Typical Applications; Glossary of Acronyms. Sponsored by International Rectifier

The Basic Soldering and Desoldering Guide

How to solder; types of irons; desoldering; troubleshooting. by Alan Winstanley

Sam's Laser FAQ

Safety, Info, Links, Parts, Types, Drive, Construction - A Practical Guide to Lasers for Experimenters and Hobbyists

How Stuff Works

How Stuff Works is a great place to come to learn about how things work in the world around you. Have you ever wondered how the engine in your car works, or what gears do, or what makes the inside of your refrigerator cold? Then How Stuff Works is the place for you!

Application Training Guide

Includes: Basic Circuit Theory, Basic Semiconductor Theory, Device Cross Section, Mounting Techniques, Typical Applications, Glossary of Acronyms. Sponsored by International Rectifier.

LCD Frequently Asked Questions

Sponsored by the Electrical Engineering Department of the University of Washington

FAQs About Electronic Repairs

Includes Samuel M. Goldwasser's "Notes on repair and diagnosis of...audio equipment and other Miscellaneous Stuff, CD players and CDROM drives, [computer] Video Monitors, TeleVision (TV) Sets, Video Cassette Recorder (VCR), small SwitchMode Power Supplies (SMPS). microwave ovens, [Hand-held IR] Remote Control, and much more.



All About Oscilloscopes

Extensive tutorial about oscilloscopes

Bob Blick's Assorted Electronics Projects

Projects include: Servo pulse to PWM converter; H-bridge; Tektronix THS720 screengrab program; Audio Preamp; Mechanically Scanned LED Clock; Convert microwave oven to 2.45GHz CW Amateur Radio transceiver; 7x10 Moving LED Sign; PIC Chip Programmer; Serial cable for Casio digital cameras

Play Hookey

Direct Tutorial Links to Digital Theory and Experiments

Electronic Troubleshooting

An interactive work book.

How Electronics Works

A tutorial guide as to how electronic parts are developed and used in a variety of everyday components.

Ian Purdie's Amateur Radio Tutorial Pages

"Electronics tutorial radio design pages for amateur, ham radio, electronic project enthusiasts as well as for the electronic hobbyist and for home learning to design your own electronic projects"

The 8052 Online Resource

This web site is dedicated exclusively to the 8052 mirocontroller, related products (both hardware and software), and 8052 derivative chips. Includes: Tutorials, Code Library and Message Board. Sponsored by Vault Information Services

Don Lancaster's Pick a Peck of PIC's Library

This library shelf holds tutorials and application notes that you can use to get yourself PIC literate in a big hurry.

Physics Tutorials

Some of the tutorials included are: Torque and Rotational Motion; DC Circuits; Free-Body Diagrams; Exponent. Growth and Decay; Simple Harmonic Motion. Sponsored by the Department of Physics, University of Guelph.

Control of Stepping Motors, A Tutorial

This tutorial covers the basic principles of stepping motors and stepping motor control systems, including both the physics of the motor, the electronics of the basic control systems, and software architectures appropriate for motor control. Written by Douglas W. Jones University of Iowa Department of Computer Science

Two Tutorials Sponsored by LeCroy Corporation

Available: Advanced Waveform Creation Made Easy and Fundamentals of Digital Storage Oscilloscopes.

Control of Stepping Motors, A Tutorial

This tutorial covers the basic principles of stepping motors and stepping motor control systems, including both the physics of the motor, the electronics of the basic control systems, and software architectures appropriate for motor control.