I am always curious about how does a fitness tracker work. So i did a preliminary search and found this page.
https://www.st.com/en/applications/wearable/fitness-trackers.html#overview
now I would like to know how to design a schematic based on stm32l4, are there any application notes, some circuits in knowledge base of st. If yes, Can some one point me to those pages/ tell me briefly what are the points I need to keep into consideration while designing a ftitness tracker.
