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Dimwit-Dave

Dot Matrix Digital Clock

by Dimwit-Dave Jan 12, 2019
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Love this. I've used 4 single matrices linked together and it works great. I have printed the outer case with the Cura experimental 'Fuzzy Skin' mode ant it looks stunning. I'll post a make when the glue dries :)

I'm thinking about a mod to the outer case to fit a LDR so the display dims when it is darker in the room - hope you don't mind.

Great work !!!!!

Very nice. What part of the code would need to be edited to accommodate a double wide display? (2 four panel display attached end to end)

Hi psu1989
If you are using the code I placed on Github, the to set the size of the display or number of MAX7219 chips in the file MAX7219_Functions.h edit the following. #define Number_MAX7219 8 // Number of MAX7219 chips present
Regards
David

thanks, so 8 represents 2x4 panel display? 1 chip per 8x8 panel?

Correct, that's 1 per MAX7219 chip. Each of the dot matrix PCB's has 4off MAX7129 chips on board. I have tried it with 16 MAX7219 chips (4off PCB's), works well but I did need to provide an external 5V supply as the Wemos on it's own can not provide enough current.
Regards
David