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Build A Simple Automatic Garage Door Closer.
The Radio Whisperer
by George R. Steber
Learn about the methodology behind WSPR (weak signal propagation reporter) software. Page 44
Build a Stereo Gain Controller
Audio/Video,
by Dev Gualtieri
Tired of being blasted off your seat by excessive audio volume when you switch television channels or when the commercials come on? To mitigate such unnerving changes in program audio, a popular automatic volume controller from the vacuum tube era was updated to today's technology. This circuit is also useful in home recording. Page 28
Build the Garage Door Closer
Home Automation,
by Brian Beard
Leave your garage door open? No problem! This handy device will close it automatically for you. (Plus, you don’t even have to remember to replace batteries in this unit.) Page 34
Build a USB Volume and Mute Controller for Your PC
Computer Related,
by Richard Dzioba
Now you can do things like listen to music on your laptop with the lid closed because volume control is now accessible externally. Page 38
Techknowledgey
by Jeff Eckert
TechKnowledgey 2012
Find out how to upgrade your iPad 2 with a keyboard case, take 4-D photos, and if Bing is losing big (it is), along with other pretty interesting stuff. Page 10
Near Space
by L. Paul Verhage
Near Space
Global Positioning System Simulator, Ver 2.0. Page 14
Q&A
by Russell Kincaid
Q & A
Questions on flickering lamp circuits, water softeners, and USB testers are just some of the things talked about this time. Page 22
Fundamentals For Beginners
Build a Variable Timer
This is an adjustable timer circuit. Page 50
Smiley’s Workshop
by Joe Pardue
Smileys Workshop: An AVR C Programming Series (Part 42)
Breadboard LCD Navigator Part 1: the LCD. Page 53
The Spin Zone
by Jon Williams
The Spin Zone
Prop Talk. Page 58
The Design Cycle
by Fred Eady
The Design Cycle
MPLAB's X Factor. Page 68
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