Содержание номера

Features

A Simple DC UPS
by Philip Kane
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.

Projects

Explore Electronic Chaos
Electronic Gadgets
by Norm Looper
Need more chaos in your life? Well, we’ve got a simple, electronically-driven pendulum that can produce all the randomness you like.


Build a Wi-Fi Sprinkler System
Wireless
by Bob Colwell
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.  

Columns

Techknowledgey
by Jeff Eckert
TechKnowledgey 2011
Read about a new approach to electronics, a solar-powered wireless keyboard, do-it-yourself thermocouples, plus more cool stuff you’ll find fascinating.

The Spin Zone
by Jon Williams
From Spin to PASM and Back Again!
For those of us that started with the BASIC Stamp and then (perhaps) migrated to the SX via SX/B, there can be a bit of a learning curve moving to the Propeller and its native language, Spin.

Q&A
by Russell Kincaid
Q & A
This month’ questions cover a CAT 5 cable tester, a model railroad sequencer, a low battery circuit, and an LED replacement for incandescent lamps.

The Design Cycle
by Fred Eady
Time for Some RTCC Translating
Our goals this month are to write drivers for the EA DOGM162L-A LCD and the PIC18F47J53’s hardware RTCC (Real Time Clock Calendar).

Smiley’s Workshop
by Joe Pardue
Smileys Workshop: An AVR C Programming Series (Part 30)
AVR_Toolbox — Documentation and Libraries.

Near Space
by L. Paul Verhage
The NearSpace UltraLight — The Everyman’s Flight Computer
My goal was to create an affordable near space flight computer that was still worth flying into near space. The most affordable PICAXE capable of meeting this need was the PICAXE-28X1.