How does the max 30100 pulse oximeter work?
When the heart pumps blood, there is an increase in oxygenated blood as a result of having more blood. As the heart relaxes, the volume of oxygenated blood also decreases. By knowing the time between the increase and decrease of oxygenated blood, the pulse rate is determined.
It turns out, oxygenated blood absorbs more infrared light and passes more red light while deoxygenated blood absorbs red light and passes more infrared light. This is the main function of the MAX30100: it reads the absorption levels for both light sources and store them in a buffer that can be read via I2C.
- Working voltage: 1.8-5.5V
- Integrates both complete pulse oximeter and heart rate sensor including the optics. No need for a separate probe.
- Ultra-Low-Power Operation Increases Battery Life
- Easy-to-use I2C interface.