Measuring heart rate with a piezoelectric vibration sensor – Ohnitsch CartoonsWhile trying to create a circuit that detects whether water is flowing through a pipe by measuring the vibration with a piezoelectric sensor, just to see what happens I taped the sensor around my finger and – to my surprise – got values that were a very noise-free representation of my heart rate! Piezo sensor taped to finger Analog values from a piezoelectric sensor taped to my finger. This is eve
