Argh!. I grew up learning to design solutions to
problems, rather than
throw microcontrollers at them in the hope they'd go away.
Just like me!
But Tony, the world goes on...
Nowadays an attiny15 costs just like the same a 555. I have 1K of
program memory and other features, for almost the price of a 555. I like to
do puzzles, but there are lots of improvment in electronics. Why not use
them? Faster, easier, and it works!
I'm against programmable chips too. But Tony, we are in 2008! Things
doesn't need to be discardable, but also doesn't need to have 15 TTL chips
to work...