Category Archives: atmega

Build Your Own Rowing Machine, Now With Digital Readout!

Posted on July 4, 2018 by Fernando Gomes

An ergometer is a fancy fitness word for a rowing machine, a device which can be used to work out the muscles used in rowing. It’s an excellent cardio workout that can also build upper body strength, and resistance can be varied depending on the individual’s fitness goals. But perhaps you need to measure your workout to see your progress – in which case, [Dave]’s instrumentation package might be right up your alley.

The basic mechanical build involves a wooden frame, fitted with a rowing setup built around a modified bicycle wheel. The wheel has vanes attached, made of what …read more

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Posted in atmega, classic hacks, ergometer, excercise, excercise machine, excersize, excersize machine, rowing machine | Leave a comment

Heartwatch Monitors Your Ticker

Posted on July 1, 2018 by Fernando Gomes

The heart! A pump of the most fantastical kind, it is capable of operating for decades without rest. It’s responsible for supplying vital oxygen to the body’s subsystems, and can be readily monitored with modern technology. [Dave Vernooy] wanted to build a watch that could take heartrate and blood oxygen measurements – so he did.

Named Heartwatch, the device is a DIY smartwatch build with a bunch of exciting features. Heart monitoring is taken care of by the MAX30102 sensor which integrates all the hardware to sense heart rate and oxygen saturation into a single tiny plastic package. There’s then …read more

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Posted in atmega, classic hacks, heart rate monitor, smartwatch | Leave a comment