Ghosting is usually caused by changing the cathode value too soon after
turning off the anode at the end of the display time for that digit. Try
waiting a millisecond with all anodes off before writing the next cathode
value.
On Fri, Jul 17, 2020, 7:40 AM Paul Andrews wrote:
>
> I have had a Ca
I have had a Canon X61884803 calculator display board for some time and I
am in the process of trying to use this directly rather than pull the tubes
from it. I figured out the basic circuit for it and put together a lash-up
to drive it. Naturally it is multiplexed and LTSpice shows that 120Hz
