Why is my radar out of date?

Clicking on NOAA’s radar images gives you weather that ranges from 5 minutes out of date to around 70 minutes out of date.  Ever wonder why such a range and why they’d give us weather images that are so old? A little while back, I was working for a major retailer and had the opportunity […]

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Speeding up the ADC on an Arduino ATMega 328P

This is a continuation of the performance enhancements for reading the ADC on Arduino.  Similar steps apply to many non Arduino/ATMega processors. That other article is here: Arduino Library Functions & Macros and introduces startSample(), sampleDone(), and getSampleResult() as a way of avoiding blocking when doing an analogRead.  Here we will update the second two functions and introduce a new function: startFreeRunningADC(). […]

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Installing GCC-arm for use with Nordic nRF8122 nRF5_SDK_11.0.0_89a8197

So, this is really just my notes for installing it again next time.  If it helps, great. Per Nordic’s documentation/release_notes.txt, the library is compiled using a slightly older version so we’ll stick to that here. cd ~/Downloads wget “http://launchpad.net/gcc-arm-embedded/5.0/5-2015-q1-major/+download/gcc-arm-none-eabi-4_9-2015q1-20150306-linux.tar.bz2” sudo bash cd /usr/local/ tar -xjvf /home/user/Downloads/gcc-arm-none-eabi-4_9-2015q1-20150306-linux.tar.bz2 That’s it. Installing the Library is equally easy: cd […]

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