Many hobbyists use or repair equipment intended for automotive use, so require a power source. The linear design presented here is modernized with MOSFET pass elements that improve efficiency with no switching noise.
Inexpensive LCDs show up all the time on the surplus market, but they usually require either four or eight data lines in addition to several control lines. Of course, you could always dip into your wallet and spring for more advanced displays. However, with just a pittance of external parts, it is easy to reconfigure even the humblest LCD to run well on only two port lines of a microcontroller. This article describes just such a technique.
When natural disasters occur and phone service goes out, it’s ham radio operators who keep communications open.
While you can always listen to the radio from some newfangled device, why not do it the old-fashioned way — over the air from a desktop unit. (Plus, you get to control it with a remote!)
Graphical plotting, data acquisition, and control software for your microcontroller.
by Ron Hackett
PICAXE-Pi Communications — Part 1
Get answers to questions about the behavior of the cylon10.py program from last time, and begin an exploration of PICAXE-Pi communications.
by Louis E. Frenzel
DSL and Cable TV Broadband Internet Access: How Do They Work?
Chances are you’re already using at least one of these technologies, but recent upgrades have made them faster. Read about the technical details of each system and the most recent new features and specifications.
by Joe Pardue
The Arduino Classroom - Chapter 2: Digital Output - LEDs
As we continue our curriculum on computing and electronics basics, learn how to design circuits using light emitting diodes, and then how to use these LEDs with Arduino software to indicate events to people using your system.