Greg,
They're simple, I mean if I can use stuff like this they're simple. grin
I have a Raspberry Pi here and have it running my workshop heating/cooling fan system, however the need to learn new code was a bit of a pain.
One thing I don't like about some of the Raspberry Pi fans, is the fact that they think it is the be all and end all of automation, which it isn't, it's ok, but it's nothing like C-Bus or things like that.

Oh and there is nothing wrong with 4000 series CMOS, I've done a lot of projects with that stuff. wink

Last edited by Trumpy; 08/25/18 10:58 PM. Reason: Added last bit.