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March 2009

Nuts and Volts Magazine

Build A DC-to-DC Converter

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Features

Making the DEFCON 16 Badge

Joe highlights his design process and the problems he encountered during the creation of his most recent DEFCON badge.



Projects

Inductive Proximity Sensors

A series resonant circuit built on a Propeller demo board is utilized in this build to detect the proximity of metallic objects.


Makin’ MIDI with mistraIXG: Part 2

This time, we look under the hood of last month's design to see how the mistaIXG hardware and software work together.


Wind Your Own Transformers and Build a DC-to-DC Converter

Use this board as a platform for your switch-mode projects and experiment with winding transformers.



Columns

TechKnowledgey
by Jeff Eckert
Techknowledgey 2009
Topics covered include a dual screen laptop, phone watch, motor sets RPM record, plus more.

Stamp Applications
by Jon Williams
Creating Time-Lapse Video
In the video age, time-lapse movies are not easily produced with a video camera, but as my friend (and VFX wizard) John demonstrated, one can easily create a time-lapse movie with a digital still camera and video editing software.

Q&A
by Russell Kincaid
Q & A
Measuring energy use, more on oscillators, flat panel TVs, plus more.

The Design Cycle
by Fred Eady
Demystifying USB To Serial
It's time to stop talking and start soldering. This month, you have your choice of USB projects.

Smiley’s Workshop
by Joe Pardue
Smiley’s Workshop 8: Interrupts, I/O Registers, and the Butterfly Joystick
Using the joystick as an introduction to AVR interrupts and I/O Registers. Part 8

Personal Robotics
by Vern Graner
Robotics on a Budget
Most towns have a thrift store or other shops that recycle and resell clothes, toys, household wares, and the like. In many cases, you'll find these stores carry lots of useful electronics that can be picked up for a song.

Near Space
by L. Paul Verhage
BalloonSat Minis
BalloonSat Minis: One small step for a PICAXE, One giant leap for a BalloonSat Design.

Getting Started With PICS
by Chuck Hellebuyck
SPI Communication
In my January column, I described the I2C form of serial communication. This month, I am covering its cousin — the Serial Peripheral Interface or SPI communication.

Departments

Kit Building
by Bryan Bergeron
My latest kit, a hybrid preamp, makes an affordable, high-quality guitar amplifier that provides real 'tube sound' that even the best all solid-state preamps can only approximate.