>> I bought 10 16F628A "cheap"

You could consider building your clock with TWO 16F628s.  One
could do timing and buttons, and the other (most of?) the display.

BillW

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist