Backlight is too bright

[mariuste]

Backlight of Keypad is too bright, even at 5% PWM. Same is somewhat true for LCD backlight

• reduce the current via resistors
• update schematic

[mariuste]

try:

• R500 = 84k5
• R501 = 16k
• R503 = 16k
• R504 = 16k

-> good, implement in schematic