ARTICLES
TOOLS AND TECHNIQUES FOR ROBOT BUILDERS - Karl Lunt
You can blue-sky all kinds of ideas for a robot to build, but sooner or later, you have to start making a frame, dealing with electronics, and writing code. This article will describe some simple tools and techniques to help you get your robot going sooner.
FET PRINCIPLES AND CIRCUITS - Ray Marston
Part 1: Learn the basics of Field-Effect Transistors in this opening segment of a four-part series.
BUILD A WATCHDOG TIMER USING THE PC SPEAKER OUTPUT - Mike Keryan
How do you get a stand-alone system to automatically recover from a lock-up and continue running its programming? Check out this watchdog timer circuit you can build yourself. It monitors the PC speaker rather than an I/O address and only costs around $10.00.
MAKE YOUR OWN PRINTER PORT LED ARRAY SIGN FOR AROUND $50.00 - Robert Davis (PDF File 432kb)
Got a message to flash? This article is about a programmable sign that connects to a computer’s printer port. It is both useful and versatile.
BUILD AN INFRARED DETECTOR - Fred Blechman
They are everywhere!!! What? Infrared (IR) remote controls. Build this simple circuit to test infrared remote controls. It uses only 10 common electronic parts. No PCB is required and a common nine-volt battery will last “forever.”
DIGITAL ALARM CLOCK - Brian Beard
Alarm clocks have become so common and cheap, that it’s hard to find a construction project for a complete alarm clock. This article is just that — a complete alarm clock, from the power supply to the case.
MORE ON 121.5 MHz - Gordon West
Last month, the importance of the emergency locator beacon service at 121.5 MHz and the relatively new 406.025 MHz datastream was described. This month, learn how rescue personnel can get activated and on-scene faster when GPS coordinates are also carried in the signal.
COLUMNS
AMATEUR ROBOTICS NOTEBOOK - Robert Nansel
Explore the topic of integrated H-bridges.
ELECTRONICS Q & A - TJ Byers
OPEN CHANNEL - Joe Carr
Dealing With AC Power Line EMI. AC power line harmonics and spark hash can create havoc with radio reception. But with the methods discussed this month, you will be able to overcome many of these problems.
STAMP APPLICATIONS - Jon Williams
Stamping Myself Into Better Shape. Build an exercise timer and review practical project development tips in the process.
THE COMPUTER-CONTROLLED WORLD - Ryan Sheldon
Video for Windows (Part 2). Watch 16 video cameras in a Windows 98 window and control the position of each camera.
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