ARTICLES
POWER SUPPLY DESIGN SOFTWARE - Ken Coffman
Meet Power 456 plus: A software tool that can help you keep track of all the details of a switched-mode power supply design, and help you design the compensation.
THE HIDDEN SOUNDS ON YOUR TELEPHONE LINE - ML Shannon
“Listen-Down-The-Line” with this simple amplifier that lets you hear exactly what’s happening on your phone line.
HANDHELD SATELLITE/CELL PHONE FROM GLOBALSTAR - Gordon West
With the failure of the Iridium satellite/terrestrial portable phone system, many people have their doubts about this type of communication system. However, Globalstar can allievate these concerns since their “satellite” system is just like using cellular.
A TETHERED BACKYARD EXPLORER-BOT- Karl Lunt
Adding a simple tether to an easily-constructed robot frame can give you a powerful, fun-to-run machine with little cost or work.
TAKING THINGS APART: THE JOY OF MICROCONTROLLER DISASSEMBLY — PART 1 - Tim Deagan
This article will describe the basic concepts you need to understand how a disassembler works.”
FET PRINCIPLES AND CIRCUITS — (PART 4) - Ray Marston
In this final installment, you’ll take a look at practical VMOS power FET circuits.
BUILD A PARTY STROBE LIGHT - Fred Blechman and David Mcdonald
Flash back to the disco scene with this “like totally kewl” sound-sensitive strobe with built-in microphone. However, its applications aren’t limited to pounding music, dazzling lights, and mirrored balls.
IOKIT AND BRIDGE SOFTWARE - Don L. Powrie
Construct this cost-effective power supply which includes a two-cannel volmeter, an SPT relay, an optically isolated digital input, and some expandability.
COLUMNS
AMATEUR ROBOTICS NOTEBOOK - Robert Nansel
This month, we finish the wiring and electronics for Jiffy, take a look at an unusual three-wheeled robot controlled by a Palm Pilot, dabble into some historical and philosophical musings on the nature of hacking and the nurture of innovation, then wind things up with some suggested summer reading.
ELECTRONICS Q & A - TJ Byers
Need to fix a bunch of monitors or power supplies? Not a problem, it’s probably a common component. Capactive ESR revisited, and a nudge about vacume tubes. More to come on valves next month. Finally, Mars as art — 25,000 photos on the web as eye candy.
OPEN CHANNEL - Joe Carr
VLF Radio.
Take a more extensive look at ELF, VLF, and LF.
STAMP APPLICATIONS - Jon Williams
Stamps in the Lab continued ...
Last month, we kept our PC connected to the Stamp and used it as an “information provider,” pumping out data. This month, we want to ask our Stamp for specific information and also give it information to affect its behavior.
|
