4 layers73.3 × 74.4 mm

Piezo sensing
Markvsid/Piezo_sensing
Exploratory project using piezoelectric contact sensor to attempt to extract footstep count, breathing, and heartbeat. 4 layer stm32H7 PCB with analog charge amplifier front end.
105 parts
Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.

Markvsid/Piezo_sensing
Exploratory project using piezoelectric contact sensor to attempt to extract footstep count, breathing, and heartbeat. 4 layer stm32H7 PCB with analog charge amplifier front end.