Comment on 256 LED SMD “Practice” Board by Erwann Kerguenec

So so so so interesting. Your article helped me alot, as my DX158 looked like it doesn't work, but my arduino can handle it.
I reserve this LED matrix for a later project (don't know which one at this time but one day, for sure).
BTW, I asked informations about the DX156 to ChatGPT - and obviously it doesn't have found anything but that was not my prompt - but it manage to find a suitable µC which is relatively consistent with the pinout on PCB :

ww1.microchip.com/downloads/en/devicedoc/40001413e.pdf" rel="nofollow ugc">PIC12(L)F1822
Maybe the DX158 is a kind of clone or so.
Have a great day !