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4 April 2015
08 TechKnowledgey 2015
Events, Advances, and News
The world’s largest digital camera has been funded,
Intel is getting sticky, you can get skin care via your
iPhone, plus there’s lots more to read about.
Making a smart house smarter, a telephone
off-hook alarm, and radio tuning are question
topics this time.
16 The Spin Zone
Can We Talk? Again?
This month’s project goes through setting up a
simple command language for controlling the
Propeller through a serial interface.
58 The Design Cycle
Advanced Techniques for
The RN4020 PICtail Plus BLE.
Bluetooth 4.0 is becoming the de facto standard
when it comes to embedded device monitoring and
control from iPhones and Android devices.
Microchip’s BLE radio module is called the RN4020.
Unlike many of the other BLE offerings, the RN4020
Bluetooth Low Energy radio module comes backed
with a full load of example code and hardware
development tools. This month, we’ll get started on
the BLE path with Microchip’s RN4020 PICtail,
a terminal emulator, and a laptop.
67 Practical 3D Printing
Real World Uses for the
3D Custom Storage Boxes.
Get your electronics über organized with specially
designed storage drawers.
70 Near Space
Approaching the Final Frontier
CubeSats — Part 3:
Attitude and Velocity.
Learn about some “toys” that help CubeSats control
their own attitude and velocity.
24 Build Your Own Arduino Barograph
Feeling pressure? Then, you need a barograph to
■ By Mark McGuire
28 Build the Super KISS Timer
Ever built a project that needed an accurate timer to
switch something on or off at regular intervals?
See if this simple one fits the bill.
■ By Frank Muratore
32 Build the Annoy-O-Matic
You’ll always be ready for April Fool’s Day with this
easy circuit that will help bring practical jokes to a
whole new level.
■ By Bob Diaz
38 Beyond the Arduino — Part 2
Last month, we established a hardware platform to
work on. This time, we’ll dive right into working in a
■ By Andrew Retallack
48 Add a Real Time Clock
to Your PIC Projects
RTCs have all kinds of neat uses in microcontroller
projects. Get introduced to this wonderful world of
timekeeping with the popular and inexpensive
■ By Thomas Henry
52 Driving LEDs with a Microcontroller
Typically, one of the first experiments people do
when working with microcontrollers is to blink an
LED. However, the thrill of this wears out pretty
quickly, so let’s see what else can be done.
■ By Craig A. Lindley
Amateur Radio — Not
Just for the Nostalgic
07 READER FEEDBACK
22 NEW PRODUCTS
74 NV WEBSTORE
78 TECH FORUM
81 AD INDEX
April 2015 Page 48