I simplified the wiring to make things alittle clearer. The orig schematic is also posted underneath so my mistakes can be found easier. Help me fix it!
:)
Crap!
I keep forgetting the link!
http://www.freewebs.com/martyb/index.htm
This one should work, for those of you who couldn't get the other one to work
Marty
At first glance, you'll need to ground the unused inputs of the 4049. Floating inputs can stop CMOS chips from functioning via a condition called "latch up". I would start there.
Latch up can be a real pain because everything else will look correct but it still wont work.
I'll take a more in depth peek at it later if the above doesn't get it running.
Good luck,
-Peter
Thankyou Peter. Excuse the naive question, but that'd just involve grounding any pins not connected to something else on the board?
You only want to ground the inputs of the unused inverters. You can also tie them directly to Vdd (pin 1) if that makes things any easier. The whole idea is that you want anything that's unused to be at a solid logic 0 or 1. This will stop those inverters from oscillating (at many KHz or MHz) and reduce the power consumption in addition to making things work in the first place.
If you don't get it by tonight, I'll do a full trace on your layout. :)
Take care,
-Peter