Thanks that looks great! Yeh its not what I asked about originally but I didn't think I would be able to cope with much more lol, this should be ok for me. Not actually homework in this case, I didn't know about this forum when I was doing my AS
...less than a month until results day, hope I did good in electronics, want to take it next year too.
Anyway thanks again for all the help guys
EDIT: Ok, I was just having a look on that link to the Maxim site, I can't see a "M7217A" listed on that page? Also I typed "M7217A" and "MAX7217A" in the search bar but got 0 results. Am I using the wrong name for it?