“This ECG (Electrocardiogram) unit has an integrated display. The display can show individual heart beats in a large format, the train of heart beats in a small format and a Poincar plot.
It is battery powered and can be worn round your neck on a lanyard.
It is built from an AD8232 module (7 with leads), an Arduino Nano (3) and a 2.8” TFT display (6) plus a few resistors, a pushbutton and so on - the sort of things you already have. For power, you can use 4 AA cells or a single Lithium cell.
You might be interested in your heart during the Covid-19 pandemic. Covid-19 can sometimes give rise to cardiac complications including arrhythmia, ischaemia, infarction, tachycardia and conduction problems. But by the time that happens, you’re probably lying in an intensive care ward.”