30 Build A Low Cost, High Performance
12 Watt Amplifier For Eight Ohm
Construct this inexpensive amplifier for “clean”
■ By Ronald Anderson
36 Build Your Own Induction Charger
If you like the idea of having a wireless
replacement for your USB port to recharge your
battery powered projects, then you’re gonna
want to build this device.
■ By Matthew Bates
10 TechKnowledgey 2013
Events, Advances, and News
Yes, Virginia, there is a monopole; is it an AIO or
tablet; dippers for tippers; and a bill that’s been
introduced to protect electronic privacy are just
some of the topics covered.
14 PICAXE Primer
Sharpening Your Tools of Creativity
Have A Piece Of PICAXE Pi
Begin exploring the possibilites of interfacing
PICAXE processors to the Raspberry Pi, starting
with a simple stripboard circuit that will allow
easy access to several of the Pi’s GPIO pins.
Reader Questions Answered Here
An ampere-hour meter, a cat alarm, and a
two-way intercom are discussed.
56 The Design Cycle
Advanced Techniques for Design Engineers
Score Big With The Lemos LMZ ZigBee Module
ZigBee networks can cost upwards of $7,000 to roll
your own custom embedded ZigBee radio
application. See how to get an embedded ZigBee
application on the air with just a microcontroller,
an inexpensive radio, and some simple C code
for way less.
44 A Mathematics Engine
Even though microcontrollers are magical, their
math skills sometimes leave something to be
desired. In this article, we’ll explore connecting
a microcontroller to the TI- 83 Plus graphing
calculator for use as a coprocessor to help figure
out some of the tougher equations, and we’ll
even be able to do other stuff like data logging
— thanks to the calculator’s large memory.
■ By Thomas Henry
50 More Raspberry Pi, Anyone?
Get step-by-step instructions on how to turn
your RPi into a remote-controllable Internet
radio/music file player.
■ By Craig A. Lindley
63 Open Communication
The Latest in Networking and
Connected Cars Communicate
Telematics is the wireless technology that
connects your car to the outside world ...
and it is hot! Here’s a summary of this
68 Smiley’s Workshop
Programming • Hardware • Projects
Arduino Handheld Prototyper — Part 2
Take a close look at the software for this
09 READER FEEDBACK
27 NEW PRODUCTS
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6 August 2013