They are not 7-segment displays
Well, I received three of theseBut I could not seem to do anything with it using your library.Any suggestions?
nice ones. Which chip is used? I only read I2CEdit: HT16K33 according the pictures ...
Edit: HT16K33 according the pictures ...have you tried https://www.adafruit.com/product/1427 already?
Basically, anything with 74HC595s and less than one chip per digit will need interrupts - or well-written code. And be pretty lousy in performance (inconsistent brightness).
Perhaps you could post the eBay/ Aliexpress (or groan: Amazon) title for each of these displays; not necessarily to a particular vendor but to enable them to be readily found?
I am inclined to get one or two if trivially cheap just to play with, especially that oversize MAX7219 if it really is large. Even better if green!
With interrupt you will usually have stable brightness, except if you have some very slow interrupt routines and that is bad programming anyway.
I know some of the displays can be a bit hard to find, but the problem is maintaining it if I put it in my manual.
You can get the large MAX7219 in any color:https://www.ebay.com/itm/MAX7219-8-Digit-0-56-7-segment-LED-Module-kit-arduino-AVR-numbers-C-cathode/121031909296
I got the single digit HC595 here:https://www.ebay.com/itm/0-56-74HC595-1-bit-Red-Digital-Tube-Digit-LED-Display-Module-5v-for-AVR-Arduino/322389569620
The large HC595:https://www.ebay.com/itm/0-8-7-Segment-4-Bit-Digital-Tube-LED-Display-Module-For-Arduino/401588004429
With properly written and not too busy code using millis(), it should be equally stable. My particular concern was the problem using HC chips as digit drivers, so the segment brightness will depend on how many segments lit - "8" being substantially dimmer then "1".
Which is why I suggested the title rather than the link - since it is commonly shared by many "personalities" as they come and go with the otherwise same details.
Even though there is no selector for colour in that listing. And for the price, I would expect excellent service!
Nasty piece of work, almost as bad as in the other thread. Completely missing the segment resistors.
(but why do they add unsoldered SMD components to a DIL package, wtf ... )