Sunday, February 23, 2014

Graphing Twitter Mentions with the Raspberry PI

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Objective: Use the Raspberry PI to monitor Twitter for specific words or hashtags that are tweeted.  Graphically display the results on a ...
Sunday, February 16, 2014

DS Nano v2 Oscilloscope Performance

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The DS Nano v2 is a very low cost 1-channel oscilloscope that, for the ~$80US price, has served me pretty well for my hobby electronics.  Th...
Tuesday, December 10, 2013

Arduino Compass Bearing Following Robot

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Objective: Build a robot that automatically tracks a user provided compass heading.  Create a proof of concept indoor model and then scale ...
Friday, October 25, 2013

Exploding a Capacitor

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Every electronics DIY/hobby site seems to have a cap exploding.  This is the WhiskeyTangoHotel oblatory example.  Actually, this is the firs...
Tuesday, August 6, 2013

Failure Tutorial: All hail the Mighty Bypass Cap

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It's frustrating.  You design a great project, get it working perfectly on the breadboard with that nice beefy bench power supply only t...
Tuesday, July 16, 2013

Raspberry PI: Charting Ambient vs Outside Temperature

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How to use a Raspberry PI to chart ambient temperature vs outside temperature.  Source code and schematics below. What you need: Rasp...
Wednesday, May 29, 2013

PI in the Oven: Logging Raspberry PI Core Temperatures to Sen.se

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Objective:  Create a method of logging Raspberry PI data to the sen.se  website.  In this example I plot the core temperature of two Raspber...
Saturday, May 11, 2013

Speech Synthesis on the Raspberry PI

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Here is a quick and simple tip to add speech output to jazz up your Raspberry PI projects.  It is easy as installing the "festival...
Thursday, April 11, 2013

Hand of PI (Twitter controlled Robot Hand)

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OBJECTIVE:  Use the Raspberry PI to monitor a Twitter feed and control a mechanical device. If you are not interested in the details of t...