Pin 1: NC
Pin 2 (PB3 / ADC3): Digital input for the brightness adjustment button.
Pin 3 (PB4 / ADC2): NC
Pin 4: GND
Pin 5 (PB0 / OC0A): PWM output to the LED strip via MOSFET.
Pin 6 (PB1): Digital input from the PIR motion sensor.
Pin 7 (PB2 / ADC1): Analog input from the ambient light sensor.
Pin 8: 3.3V