7 segment display problem
So I'm testing my PICkit2 with PIC16F690 to make a 7 segment display work, and it's doing what it should do.
Now I wanted to add a second display, and make the pic count from 0 to 59, and display it on the 2 displays.
The program quite works, but I got a problem with segment c, e, f, and g from the right (unit)display, (connected to respectively RC4, RC2, RC1 and RC0). The problem is that sometimes (not always) that segment just flickers once, and then goes off. If I test the displays seperately (so the left one counts from 0 to 5 quite slow, and the right one from 0 to 9 10 times faster), then it works. but put together, those few segments seem to fail sometimes, and not always on the same numbers. Most of the time it's on 02, 03, 04, 13, and some more further on.
Does anyone have a clue what the problem is?
Thanks in advance,