The Arduino pin names are silkscreened right on the board, but sometimes you must know the corresponding ATMega168 pin name. I printed out The Fine Manual and penciled in the Arduino names, but that’s getting smudgy.
Herewith, the ATmega168 pinout with neatly printed Arduino pin names.
[Update:Turns out there’s an Official Version.]
Sometimes, you also must know the relation between hardware Timers and PWM output pins:
| OC0A | PWM6 | PWM3 | OC2B | |
| OC0B | PWM5 | PWM5 | OC0B | |
| OC1A | PWM9 | PWM6 | OC0A | |
| OC1B | PWM10 | PWM9 | OC1A | |
| OC2A | PWM11 | PWM10 | OC1B | |
| OC2B | PWM3 | PWM11 | OC2A |
