Raspberry Pi and the Adafruit I2C Library

In the last post we looked at testing new I2C devices using the Bus Pirate when prototyping a new design.  In this post we look at making a more permanent implementation by interfacing the MCP4725 Digital-to-Analog Converter to the Raspberry Pi.  Just as last time, we will be driving an LED.  Some notes about our…

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Bus Pirate and the MCP4725 DAC via I2C

Bus Pirate and the MCP4725 DAC via I2C.  Wow.  What a mouthful.  Following up on one of the most popular posts (SparkFun DAC Breakout Board Tutorial) in this guide we will take a look at controlling the MCP4725 DAC via the I2C protocol using a Bus Pirate from Dangerous Prototype.  Before we get started let’s…

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Route 66 – Version 2.0

“That the passing of our friend the horse is only a question of time […] however much the breeders of the [horse] may strive to arrest the progresses of public opinion in the adoption of this view […] and there is little room to doubt that they will ere long have to accept the inevitable,…

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New Software, Old Energy

“Nothing endures but change.” ~ Heraclitus Change is hard.  But it is also inevitable.  Death is nature’s change agent.  And just as people die, so do paradigms and businesses.  And though it is hard on those who must live through the change, the end result for future generations is a world better off than what existed…

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Government and Innovation

“If I have seen further it is by standing on the shoulders of giants.” ~ Sir Isaac Newton There seems to be a lot of misconception regarding the role of government spending in spurring innovation.  As someone who has spent 15 years in various roles at the Department of Defense; including research intern, military officer,…

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“Free” Internet For All

The Internet.  The Information Superhighway.  A complex the system that seems to be constantly re-inventing every aspect of our world.  And for years the drive has been to make Internet access cheaper and faster.  But suddenly we’re hitting a wall propped up by corporate greed that threatens the neutrality that made the Internet what it…

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Open Letter to the Boy Scouts Regarding Discrimination

There is a movement afoot by Eagle Scouts across the country to protest the recent decision by the national BSA leadership to uphold a policy of discrimination against homosexuals.  Many of us are writing letters and sending back our Eagle Scout award to the national council.  My letter is as follows: 24 July 2012To The…

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Getting Started With Ham Radio

I get questions all the time from friends and strangers alike about tech, engineering, and other geek topics.  When I get a good one, I like to share the question and response to benefit everyone.  The latest question is how does one go about getting involved with amateur radio?  Here is a summary of my…

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