Health

Build Your Own ECG-EKG Unit

I find medical instruments like an ECG-EKG unit really fascinating. To be able to watch the electronic firing signals of a heart is mesmerizing and informative. For parts costing less than $50, I built a unit that plugs into my laptop computer’s microphone input jack and displays stunningly clear ECG waveforms. The unit worked beautifully when I tested it on myself, my wife, and friends.