The lamp boards I am using on the first PCBs I've designed. The idea was to create a board that could have multiple LEDs on it to minimize wiring and to be able to handle a range of spacing. Most games will have sets of inserts in a row, two, three, four or more, so the goal was to make to these could be done with a single board. The PDB-LED boars that Gerry sales, are design for 84 LEDS or 28 RGB LEDs, and then those are set up as 4 per 20 pin header. so I designed my boards to match that, so that is just a simple ribbon cable connection between his board and my lamp boards.
Since four in a row is not all that common, I designed the board, so that you could 'snap' off either end and use it as a 'satellite' board. So the main board has a place for a header as does the two snap offs. This then allows two of RGB LED to be located nearby with just a short 4 wire jumper. if you look at the images in my last post, you will see various examples of this. In fact, there is only one case where I am using all four 'slots' as a single board, and that is in the long row of stand-up targets. You will see in the middle of the playfield, where there are five boards using three and a few of them then have the satellite boards. I also have six or seven spots where there are two square inserts and an arrow, so in those cases as well there is typically a nearby satellite board. There are also places were there are two satellite boards.
In addition, I designed the board that each of the four locations, actually has 5 different locations you can put the LED. This allowed me to handle wide range of spacing between LEDs. I believe I am using 7 different 'spacing' arrangements.
The boards are designed of the piranha style RGB LED. I also have some standard format RGB LEDs that I expect to use, but have not tested that out yet.
There are a few tweaks/fixes I would make to the boards in the future, but fortunately there were no show stoppers and the first batch I had made got the job done.