I have a 7-segment display (has two decimal point on each side) the only numbers on it are M72/K312B. I cannot find any datasheets for it! Can anyone help me?
Don't worry too much about not being able to find a datasheet.
If you have a meter with a diode test function, you can quickly determine which pins will light up which segments, and which pin(s) are the common cathode or common anode connections.