uDuino: Very Low Cost Arduino Compatible Development Board

Step 6 Connections for Arduino development

Note that the pins on an ATmega168 don't map obviously to the Arduino names.

atmega168 Arduino
2 Digital 0
3 Digital 1
4 Digital 2
5 Digital 3
6 Digital 4
11 Digital 5
12 Digital 6
13 Digital 7
14 Digital 8
15 Digital 9
16 Digital 10
17 Digital 11
18 Digital 12
19 Digital 13

23 Analog 0
24 Analog 1
25 Analog 2
26 Analog 3
27 Analog 4
28 Analog 5