I have a design that needs 4-digit 7-segment LED with decimal points and colon 0.56" digits. I looked on ebay and there seems to be only 2 sellers that sell these (yeah, some are aliases of the same sellers). One has the wrong connection diagram. I got a sample from them and the decimal points don't work. The other seller doesn't even offer connection diagram and just claims all the dots work. Should I trust them? I also looked at digikey and sparkfun but they don't have large enough digits. If you have used such display (both decimals and colons have to work), can you suggest a source of this display? Thanks.
My only one suggestion received from GoForSmoke:
This is common cathode and there's only one color so I wonder if there are other ones and common anode ones out there I just don't know. Thanks.