Electrical and mechanical schematics for sugar sensor. Includes PCB design and BOM + Gerber files for sensor production Repository has 2 branches: v1 and v2. Both are based on MAX86141 AFE to work with LEDs. The difference between v1 and v2 are the following:
- v1 uses 3 LEDS (RED, GREEN, BLUE) as light source (non-coherent) while v2 uses 7mW 650nm RED laser (coherent)
- v1 uses AD5933 BioZ controller while v2 uses MAX30002 BioZ controller
- in v2 the main board dependency is removed. Main board replaced with external TinyPICO board and add-ons. Sensor board is stackable
- The main reason to move from v1 to v2 of the sensor board is failed tests on non-coherent light sources. "Failed" means prediction based on these measurements didn't work.
- Version 2 deprecates "main" folder with all the schematics for main board (controller). Sensor board is stacked with TiniPICO development board and it is stacked with RGB IPS Display shield from add-ons menu.
- Sensor board programming, testing and obtaining the results is done using MAX32630FHTR application platform. Development was done in Mbed Studio
- hull for the wearable device
- lib is custom libraries for KiCad
- main is a mainboad schematics. Valid only for v1. Not tested and not produced.
- mech is 3D models for the KiCad component representation on PCB
- sensor is sensor schematic, board, BOM, gerbers for production. Both versions were tested and produced