The Radio Whispererby George R. Steber Learn about the methodology behind WSPR (weak signal propagation reporter) software.
Build a Stereo Gain Controllerby 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.
Build the Garage Door Closerby 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.)
Build a USB Volume and Mute Controller for Your PCby 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.
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.
Near Space by L. Paul Verhage Near Space Global Positioning System Simulator, Ver 2.0.
Q&A by Russell Kincaid Reader Questions Answered Here Questions on flickering lamp circuits, water softeners, and USB testers are just some of the things talked about this time.
Fundamentals For Beginners Build a Variable Timer This is an adjustable timer circuit.
Smiley’s Workshop by Joe Pardue Smileys Workshop: An AVR C Programming Series (Part 42) Breadboard LCD Navigator Part 1: the LCD.
The Spin Zone by Jon Williams The Spin Zone Prop Talk.
The Design Cycle by Fred Eady The Design Cycle MPLAB's X Factor.