So, here is some information for those who want to recreate it.
The original thread is here in German, I hope google translater made it correct
https://www.flippermarkt.de/community/forum/threads/topper-fuer-den-gunner.235622/#post-1888755
Here we go...
JJP implemented the RGB lighting on the playing field with WS2812 LED strips.
These are connected with three lines, + 5Volt, GND and a data line. These two 3-pin connections can be found on the playfield board under the playing field.
On the left you will find the connections Rail L and Rail R, these are the ones we need, here you can tap the data bus. The white wire on the plugs is GND, green is data and the red one is + 5Volt. We will not divert the 5Volt here in order not to overload the electronics of the JJP, we will do that later with a separate power supply.
1622818124998.png
1622819744829.png
So now we know where the data line comes from, so we only need to think about what to do with it ... a
simple test is to connect a piece of WS2812 LED strip. So connect GND and data to such a strip, + 5V comes from the power supply unit described later. You can find it on Amazon or anywhere else, I bought 5 meters for 30 €. The following is important! If you connect such a strip, it has "Data in" on one side with arrow> to the LED, this is the right side to connect. The other side is data out and cannot be used for this. The length does not matter at first, just cut it to the length of a topper or the backbox and you're done ...
1622817875020.png
For the topper, I simply put four strips (each about 32cm long) and the connections with data in always in the middle. Two are angled at the front in front of the topper and two between the plastics. The left two strips were connected to Rail L and the right two to Rail R of the playfield board. So the effect always comes from the middle to the outside ... The two strips behind the backbox are glued directly on and then connected to the Rail L and Rail R again with GND and Data In. Here I put the "Data In" down, the effect then comes from below ...
1622821003926.jpeg
1622821064250.png
ALL stiffeners still need a power supply of 5V DC. For this purpose I took a small Meanwell 5Volt 5Ampere power supply and connected it to the strips at GND and + 5V. In contrast to the data lines, the GND connection of the strips is the same at both ends of the strips, so it doesn't matter which end you connect the + 5Volt power supply to.
You can get the 230V mains voltage for the power supply separately from a socket, or stop directly from the pin from the backbox.
I mounted the whole thing on an extra plate and attached it to the backbox with two screws, as the Lexmilton topper provides for attachment.
Finally, two red LEDs (just put on the 5Volt) in the skull and that's it ...
⚠️I hope that helps you, I would like to point out very clearly that you act on your own responsibility and that it is very clear what for hobbyists, who also have a little electronic understanding ⚠️
Greetings
Ralf