August 12, 2018

Earlier this year I built a custom heart rate monitor to wear when diving.  It's based around a sealed Polar chest strap and a waterproofed Arduino unit with relevant sensors and data logging.  Yes, I know such devices do already exist (ironically a few weeks after I finished my device I picked up a Garmin Descent...

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December 24, 2018

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Equalizing Your Ears 101

May 8, 2018

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