This is a thermoelectric generator (TEG) boost converter used to power a connected battery or capacitor to periodically operate a microcontroller reading from a biometric sensor to compute blood oxygen saturation. That was a big sentence!
This is the second iteration of the TEGSense board, with some schematic fixes and redesigned for a smaller flex board with bigger contacts for easy printing of conductive traces. It is intended to be connected to a print-friendly version of the SpO2 board and a flex capacitor bank.
Shield:
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