An Oscillator Sounded Like A Beating Heart

We all know the sound of our beating heart, especially when we’re around someone we like. Wilson Greatbatch was no stranger to the sound of a beating heart. When he committed a grave error during his experimentation in 1960, it led to a fascinating discovery that changed history as we know it. He was trying to build an oscillator to measure the rhythm of the heart in someone with tachycardia.
By mistake, he added a resistance of one kilohm instead of ten, which made the electrical circuit produce a strange rhythm. He associated this with the beating of a heart. Pacemakers send electrical signals to the heart to correct its beat, and since their accidental discovery in 1960, have come a long way(Mayo Clinic).