3 LEDs, 3 ~1K resistors. Very thin cables. Soarer's doc has details.
phosphorglow presumably did this mod by gluing the cables to the inside of the barrel plate (seems to be his usual modus operandi (http://phosphorglow.net/2014/08/03/1397681-february-22nd-1993/)), so if you want to stay close to that / do not want visible cables, a bolt mod would be necessary.
[Edit:] Actually, looking at this SSK mod (http://phosphorglow.net/2014/10/11/69/), he might also have used SMD LEDs and routed the cabling from the front side. That would be non-destructive and reversible.
That second link looks more viable with the non-destructive wiring, but not sure how it connects to the controller.
But be aware that there's an error as you need to put +PIN if you're not using the -PIN option option (the documentation leaves the + off so it errors when you compile)That second link looks more viable with the non-destructive wiring, but not sure how it connects to the controller.
That depends on the firmware. For Soarer's Converter (https://geekhack.org/index.php?topic=17458.0), it's in the documentation enclosed in the .zip file, on the page named hardware.html.
And what exactly are you referring to here?But be aware that there's an error as you need to put +PIN if you're not using the -PIN option option (the documentation leaves the + off so it errors when you compile)That second link looks more viable with the non-destructive wiring, but not sure how it connects to the controller.
That depends on the firmware. For Soarer's Converter (https://geekhack.org/index.php?topic=17458.0), it's in the documentation enclosed in the .zip file, on the page named hardware.html.