Q&A
by Russell Kincaid
Q & A
Help with a random number generator, battery tester, LED dimmer, and a nonsense circuit are just some of the topics covered in this month’s column. Page 0
Techknowledgey
by Jeff Eckert
TechKnowledgey 2012
Read about a battery that offers a 25 year operating life, Clouds with ears, and seeing sound, to name a few. Plus, Pong turns 40. Page 10
Smiley’s Workshop
by Joe Pardue
Smileys Workshop: An AVR C Programming Series (Part 43)
Breadboard LCD Navigator Part 2: The Navigator Buttons. Page 59
Fundamentals For Beginners
Build a Moisture Detector
If you’d like to test plant soil for moisture, you can use this circuit to do so. The more moisture there is, the faster the LED will blink. Page 76