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June 2012

Nuts and Volts Magazine

What Is 4G? Do I Need It? Do I Care? How Does It Work?

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Projects

Cracking PDF File Passwords With a BeagleBone Board

Computer Related

Instead of installing third-party software to crack passwords of encrypted files, try this inexpensive off-the-shelf embedded system that you don’t have to connect to your computer.


Turn Your iPhone into a Plant Moisture Sensor

Convert an iPhone or iPad into a quadcorder and use it to “scan” for intel, like how wet or dry your plant soil is.



Columns

PICAXE Primer
by Ron Hackett
PICAXE Primer
Interfacing the DS18B20 Digital Thermometer.

TechKnowledgey
by Jeff Eckert
TechKnowledgey 2012
This month, there’s a spotlight on bacteria, a scanner that features Wi-Fi memory, a big telescope for the big bang, plus some other interesting stuff.

Q&A
by Russell Kincaid
Q & A
Solar converters, speaker protectors, and transformerless power supplies are just some of the topics discussed this time.

Smiley’s Workshop
by Joe Pardue
Smiley’s Workshop 47: Arrays, Persistence of Vision Wand
Done with C pointers and moving on to arrays. As a reward for our patience with the theory, we'll build another project using the chaser lights kit: a POV (Persistence Of Vision) wand. Part 47

Open Communication
by Louis E. Frenzel
Open Communication
What is 4G Wireless? 3G/4G ... Does it really matter?

The Design Cycle
by Fred Eady
The Design Cycle
Some IEEE 802.15.4 Transceiver Magic.

Fundamentals For Beginners
Build a Morse Code Oscillator
Try your hand at an “old school” communications method that is still practiced today.