7 Seg Display using DM9368N

8 bit parallel to dual 7 segment display module using DM9368N.

Not clocked and suitable for breadboarding as part of my SPAM-1 cpu build.

The DM9368N will work fine without any resistors as it has current limiting however it drives at up to 20mA, but I want to limit the current a bit more so it's not as power hungry.

To save space I'm using a single resistor on the common cathode of the display which is a bit of a compromise.

This approach means that the display brightness may flicker as the number of illuminated digits changes.

However, the better design of one resistor per segment takes up a lot more space. I'd probably want to use a set of SMD resistors in that case. I'm using DM9368N chips because I have them. There is also the MC14495P1 driver and it has an integrated resistor array that limits the current to a few mA I think. But I think the MC14495P1 is harder to get hold of an in any case I already have DM9368N.