A Universal Direct Conversion Receiver For PSK-31
by John E. Post
Exclusive Online Article: Decode and read text message communications being sent over shortwave amateur radio frequencies. Page 0

Analog Mathematics
by Gerard Fonte
Even in the midst of the digital revolution, there's still a place for analog mathematics to streamline your designs. Page 54

Build the rCube: A Talking Memo Alarm Clock
Electronic Gadgets
by Dave Decker
This unique talking clock and MP3 speaker can record voice memos or your favorite song for your alarm, plus it's an interactive nightlight too! Page 40

Techknowledgey
by Jeff Eckert
TechKnowledgey 2009
Topics covered include super charged lithium-ions, fuel cell buses, viewing Mars, plus other cool stuff. Page 12

Getting Started With PICS
by Chuck Hellebuyck
Counting Pulses with Timer 0
Keep track of your distance traveled on the golf coarse with this counting application. Page 26

Smiley’s Workshop
by Joe Pardue
Smiley’s Workshop: An AVR C Programming Series (Part 10)
Moving Beyond Arduino. Learn how to convert Arduino programs into regular C programs. Page 62

The Design Cycle
by Fred Eady
And Now, A Riff From Jeff Beck
Designing a wireless guitar. Page 74