www.nutsvolts.com 2011 Nuts&Volts January
Projects & Features
30 Explore Electronic Chaos
Need more chaos in your life? Well, we’ve got a
simple, electronically-driven pendulum that can
produce all the randomness you like.
■ By Norm Looper
40 A Simple DC UPS
This article describes a simple uninterruptible power
supply circuit that you can incorporate into your low
power DC projects to ensure continued operation
during power failures.
■ By Philip Kane
44 Build a Wi-Fi Sprinkler System
Be master of your lawn-watering system with this
Wi-Fi project. This month, you’ll learn the building
blocks of the Rabbit RCM5450W module that runs it.
■ By Bob Colwell
10 TechKnowledgey 2011
Events, Advances, and News
Read about a new approach to electronics,
a solar-powered wireless keyboard,
do-it-yourself thermocouples, plus more
cool stuff you’ll find fascinating.
14 The Spin Zone
Adventures in Propeller Programming
From Spin to PASM and Back Again!
22 Q & A
Reader Questions Answered Here
This month’ questions cover a CAT 5 cable
tester, a model railroad sequencer, a low
battery circuit, and an LED replacement
for incandescent lamps.
50 The Design Cycle
Advanced Techniques for Design Engineers
Time for Some RTCC Translating.
58 Smiley’s Workshop
Programming • Hardware • Projects
AVR_Toolbox — Documentation and
67 Near Space
Approaching the Final Frontier
The NearSpace UltraLight —
The Everyman’s Flight Computer.
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