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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

To properly test a power supply, an adjustable load is just the ticket. See how I saved some of my light bulbs from extinction by using them as visual indicators in this adjustable electronic load.



Columns

The Ham’s Wireless Workbench
by H. Ward Silver
Waves and Propagation: Part 2 - Radio Horizon
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?