3 ms·
The idea of detecting change in the amount of light is also used by the PulseSensor - http://pulsesensor.myshopify.com/blogs/news/6326816-anatomy-of-the-diy-hea
by gautamc 14y ago
The idea of detecting change in the amount of light is also used by the PulseSensor - http://pulsesensor.myshopify.com/blogs/news/6326816-anatomy-of-the-diy-heart-rate-monitor http://pulsesensor.myshopify.com/blogs/news/6326816-anatomy-...