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Build a Headset Amplifierby Ronald Anderson This project uses all discrete components and can be driven by a CD or MP3 player. Plus, it’s a forgiving circuit for beginners.
Detecting Sounds With the Sonic Sensorby Thomas Henry Put your appliances under sonic control with this super souped-up version of a “clapper.”
Build This Simple Alarm System With the TI Launchpadby Derek Tombrello Constructing an alarm system complete with a keypad interface is cheap and simple with Texas Instruments’ MPSP430 microprocessor and their easy-to-use Flash programmer and debugging tool.
Techknowledgey by Jeff Eckert Events, Advances, and News Harpooning your brain, free secure browsing, virtual money, and high-end ear buds are some of the titillating topics covered.
Near Space by L. Paul Verhage The 2013 Great Plains Super Launch This year’s conference included topics such as near space STEM, designing and flying photometers, long-duration balloon flights and telemetry modes, and vacuum cannons.
Q&A by Russell Kincaid Reader Questions Answered Here ESD instrument circuits, more about making sparks, VFO design, and MailBag round out this month’s topics.
The Spin Zone by Jon McPhalen Full Color With One Wire LED manufacturers are creating some pretty cool products these days, and with just a little bit of programming, you can have a lot of fun with them.
The Design Cycle by Fred Eady Home Automation Telegesis Style Absolutely zero ZigBee technical knowledge (or a third mortgage) is needed to put the Telegesis home automation radios to work.
Smiley’s Workshop by Joe Grand Arduino Handheld Prototyper — Part 3 Design a fresh air controller for your castle, or wherever you call home.