Can your product handle an 85mm wide display?? Here's what is very popular and inexpensive on ebay.
8 digit, bright blue display (unlike the hard to read red displays), with MAX7219 chip to take away the complexity of a multiplex display and handles the constant current.
SPI interface with only 5 wires (not sure why so many.. I would have thought 2 should be enough).
Not sure where $1.69 fits in your price point?? But these are production LED modules that will never run out.
On Sunday, July 26, 2020, 03:19:02 p.m. EDT, Mark Moulding <mark@...> wrote:
Lee, I probably caused the availability problem with the original display you were using.? I found that to be a really neat display, so I designed it into a specialized low-volume product I produce for a client, and to ensure enough stock, I bought all they had (about 1,100 of them).? I figure that once that supply is exhausted, the product will have made enough profit to justify re-spinning the board for a new display.? I did the same with the user-interface buttons I'm using, too.
This may not seem like a particularly sound practice for a real commercial product, but it's worked out well for me; if I guess right about the projected quantity, it can save quite a lot of money.? There's certainly plenty of precedent: Many of the 70s- and 80s-era home computer kits used this model, as did (and still do) many of the "boutique" audio and musical instrument manufacturers. ~~
