[mhennessy]

Originally Posted by Amraduk

Do you mean the 4th seven-segment display (1000,s)? If the code is for 4 digits, the count would continue with that digit and it wouldn't roll-round to zero until the count reached 9999.

Suppose the count had reached (1)000 for the first time, the hidden count would be 1000, then every time the hidden count incremented by 1 (every 1000 counts), the visible count would be 000 but the hidden count would be: 2000, 3000, 4000, etc. up to (1)0000, equivalent to 0000. That doesn't seem right to me, or am I overlooking something?

Worry ye not

(0)998
(0)999
(1)000
(1)001
(1)002
...
(4)998
(4)999
(5)000
(5)001
(5)002

It's absolutely fine - honest. The old mechanical counter would have worked just as well if you'd covered up the left hand digit

Mark