I have a seven segment display with 14 pins on each side and three digits. The display include a decimal point. However, I'm struggling to figure out the function of each pin. This item is described as a "3-digit Common-Cathode Display".
I'm struggling to find the purpose of each pin. 28/3 is not an even number, so I assume all the pins......share the cathode. However, each segment has 8 L.E.D.s on it, so I don't know why I would has 4 extra pins or how to determine which ones are shared.
Can anyone help me with this? Also, not sure how to check what kind of voltage/resistors it needs, I can't find a data sheet. It's old.