I tried it without. I guess that's the dout to the next module din.
I get this display using the ledmatrix_max7219_scroll_mega328p demo https://youtu.be/2HQM0gh7Jfc
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HI. The demos under led matrix use a Max7219 and use Max7219_DO but my display has no DO line.
https://www.ebay.co.uk/itm/MAX7219-Microcontroller-4-In-One-Display-Module-For-Arduino-5P-Line-Dot-Matrix/292804189269?epid=1994378909&hash=item442c7d5c55:g:jEcAAOSwIGxb4A~W:rk:11:pf:0
What's it do? Is there any point wiring the device and using gcb?
Thanks for your patience with hobbyists.
I tried it without. I guess that's the dout to the next module din.
I get this display using the ledmatrix_max7219_scroll_mega328p demo
https://youtu.be/2HQM0gh7Jfc