Here's my idea. And I don't have enough specs available to me to be able to design this, so I was hoping someone would be able to help.

A 12 switch panel in the driver's reach, some circuitry, and a relay card to control everything in the car. My hope was to use a Basic Stamp to control the relay card. I want to toggle some of the relays, and some could be timed, etc. Brunt force design says 8 pins for the input, and 8 pins for output.

So, how can I limit the number of inputs/outpus needed on the Stamp?

How can I cause the card to latch, and not release when I stop sending the signal?

Any piece of this whole mess would be helpful.