- Biology & Biomedicine
- Heart-Rate Monitor
Adapted from B. Graham and K. McGowan, Mind Performance Projects for the Evil Genius, McGraw-Hill Education, 2010
This project uses a sensitive light-detecting resistor to detect small changes in the light beaming through your finger as your blood pumps through tiny arteries in the finger. This device is not the same as the heart-rate monitors typically used in hospitals because those use skin probes that detect changes in electrical activity as the heart beats. This heart-rate monitor actually "sees" your pulse through the body, so it can be used on a finger, toe, or even your earlobe.
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