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Get Started with a Raspberry Pi Computer
Filed by Jon Titus on 01/08/2013
Under Electronics Jon Titus
You might have heard about the Raspberry Pi, a small computer board that provides an ARM-based microcontroller and other ICs created by Broadcom. The board contains 512k of RAM, an Ethernet port, an SDIO and SD memory card connector, and I/O pins. Cost runs about $US 35. For more "Pi" information, you can visit: http://www.raspberrypi.org/. The board comes with Raspbian, a distribution of Linux, and you can immediately start the board and write programs in the Python language. See More ...
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How to Avoid Ground Loops
Filed by Jon Titus on 01/04/2013
Under Electronics Jon Titus

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Understand Wireless Communication Ranges and Antennas
Filed by Jon Titus on 12/17/2012
Under Electronics Jon Titus

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How Did You Get Started in Electronics?
Filed by Jon Titus on 12/13/2012
Under Electronics Jon Titus
Around Christmas time I think about my adventured with electricity and electronics, which started many years ago. My grandfather gave me a small wooden box with a momentary switch and a large red jewel pilot lamp, similar to the one shown nearby, but larger. I could click the switch and the light turned on. Then I had electric trains--a nice set of Lionel trains purchased second hand for Christmas when I was 6 or 7. I spent a lot of time rewiring the layout, adding signals, and changing the arrangement of track switches, or turnouts. I had fun. My grandfather also gave me 6-volt lightbulbs in small ceramic sockets, knife switches, buzzers, a bell, lots of wire, and large dry cells so I could "wire up" my own circuits. See More ...
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Chips Provide All-in-One Stepper-Motor Control
Filed by Jon Titus on 12/06/2012
Under Electronics Jon Titus
 Quite some time ago I got interested in stepper motors and used a basic stepper to advance punched cards through a crude reader mechanism with electrical contacts that completed a circuit when a hole passed by. Since then I have thought about stepper motors often as ways to solve tricky motion-control problems. Since I started to dabble with steppers, companies have introduced discrete controller chips as well as stepper-motor control software for microcontrollers. Creating designs with stepper motors gets easier and easier. See More ...
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