TiaCSys / CoffeeCaller - History

fix: level in levelshifter too low on high frequencies

The pull-up resistor to 5V was too big causing the levels not raising
high enough to provide a good signal for the WS2812 RGB LEDs. This is
fixed by choosing a smaller resistor and removing the current limiter
from the microcontroller to the source of the levelshifter's MOSFET.

Signed-off-by: Andreas Kurz <info@akurz.net>

feat: add license to repo

Signed-off-by: Andreas Kurz <info@akurz.net>

chore: redraw levelshifting circuit

No changes in PCB

chore: increase LED resistor to 5k1

The power and normal GPIO driven LEDs are quite bright. So the resistor
is increased to 5k1 as this type is already in use on the board.