This is one of the tiniest ECGs I’ve ever laid my eyes on, as it consists of an extremely tiny LCD display, a pair of electrodes and an ARM training unit. It is powered by an STM32 Primer chip, where pressing both your thumbs on the two electrodes will begin the ECG trace. Once your pulse is detected, it will beep while showing off the heart rate in a decimal format in the top left hand corner. Hopefully the accuracy of such a simple DIY project can be improved, allowing field personnel to carry a compact and lightweight ECG – that remains but a pipe dream at the moment, so this DIY ECG is relegated to the “fun” category in the meantime.
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