Peter Dalmaris / KLP 5e - ESP32 sensor board - History

Swapped pins for CS_SD and MIC_OUT so that the microphone is connected to a usable ADC.

Completed schematic fixes and updates. Continuing with the layout for Prototype #2.

Fixed and improved Schematic design:

* Changed the buttons
* Added a ferrite bead at the output of the charger to cut some possible noise.
* Changed the values of R30, R31 and C19, and i add a 100K trimmer to set the gain from 25x to 125x.
* Added C23, C24 and C25 in the photo sensor circuit

Introduced new parts that can be purchased for manufacturing by NextPCB. Corrected numerous issues.

Replaced USB C receptacle with a different model. Repositioning components to better align with manufacturer recommendations.

Replaced the button, USB, bat connector with new symbols and footprints. Completed draft layout and routing.