... considering a standard DIN module uses 4x74HC165 and provides "only" 32 ins (but ~90 are required) ... and a standard DOUT module uses 4x74HC595 and provides "only" 32 outs (but ~60 are required) The pdfs on ucapps.de gave me no clues, as "only" the standard pinning is mentioned, which is fine, but how would i realize dual color step leds for example? I guess the keywords are "button matrix" and "led matrix", pointers are very welcome... I found the respective matrix configura