Here's the first draft of an SMD PCB layout for the Airsoft Rounds Counter project.
The wire pads are as follows:
- VIN
9V power input - AN, CA
Anode and cathode the the photo interrupter LED - CO, EM
Collector and emitter for the photo interrupter transistor - A-G, DP
Segment anodes on the display - 1-4
Digit cathodes on the display - RST/PRG SW
Reset and program tact switch
Actual size is 49.53 x 20.32 mm.
SMD layout (click for larger version)