I do know the micro controllers are much more flexible. And per GRJ's post above I just downloaded the PIC MPLAB-X IDE and do intend to look into the PIC chips too. If I ever get all this figured out a PIC might be the thing I use on or for a PCB for my actual layout. I have been interested in the PICs for sometime as well.
However, I do find the IC circuits quite fascinating and your suggestions above will be put to good use to enhance the current project. I am going to try everything you suggest. Another nice learning exercise that is just what I was hoping for here. Getting this circuit to the 4 wire operation is going to be neat! I was sure I had some of the We_Honest signals, but after looking today I can't seem to locate them? Maybe they will turn up...or I'll be ordering some more for testing.
Also, I was going to ask about the 74 series 4017s possibly having more current handling as opposed to the CD4000 series, but you read my mind there too and already answered the question. I will be ordering the 2N7000s tonight and giving this a go too. I don't suppose an NPN transistor (BC547) would suffice until I get the 2N7000s? I have a small bag of BC547s on hand already (also maybe a few 2N2222s). And as you can tell, I need to do some serious data sheet study as well...if I just knew what all the data meant? Some I get, but some is not well understood to me.
Thanks to you and to GRJ for all the help and patience! It is truly appreciated and I'm even finally learning a thing or two!
