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July 2016

Nuts and Volts Magazine

Open Cores - FPGAs For The Hobbyist.

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Features

FPGAs for the Hobbyist: OpenCores

How to use open source hardware IP-cores from OpenCores.org on the Mojo V3 development board.


In-Circuit Testing Techniques

There is a technique taken from automatic test equipment called guarding that lets you calculate the exact value of an individual resistor in-circuit.



Projects

DIP Meter with Digital Frequency Display

Need a DIP meter? This device (with digital display) covers a frequency range of 1 MHz to 56 MHz, and can also be used as a frequency counter.


Water Pump Protection System

You will be “well” served by this five-component (or less!) project that helps protect your water supply pump.


Adjustable Electronic Load Using Incandescent Lamps

How I saved some of my light bulbs from extinction by building a useful lab tool with them: an adjustable electronic load.



Columns

The Ham’s Wireless Workbench
by H. Ward Silver
Waves and Propagation: Part 2
Not only hams can take advantage of radio propagation — everybody has a chance to experience some very interesting ways of interacting with the natural world through wireless.

Q&A
by Tim Brown
Reader Questions Answered Here (7.2016)
Discussion on problems with a digital clock’s backlight and “miracle” energy sources.

The Spin Zone
by Jon McPhalen
The Key to the Code
Matrix keypads are very useful for stand-alone embedded projects.

TechKnowledgey
by Jeff Eckert
Events, Advances, and News (07.2016)
Information on current events, advances, and news in various technology fields.

Departments

The Art of Electronics: What Constitutes the Atomic Level?
by Bryan Bergeron
When teaching electronics to others, how do you determine the atomic level?