Thanks for the tip on the slider slots. The momentary switches are either SPDT or DPDT (I had some lying around but only use one pole for these connections). I use them, for instance, as one direction = flaps up and the other direction = flaps down but on/off is a good idea for many other systems, thanks.

Ha, don't know but you can count them if you want! Remember that the switches are two inputs each. I know that there are about 75-100 inputs spare, though.

Worth noting that the ground for every single button and switch are shared. I just ran a thin tin-coated copper wire through all the grounds (soldered on) and then a single hookup to the card.

[quote=jimbop
Worth noting that the ground for every single button and switch are shared. I just ran a thin tin-coated copper wire through all the grounds (soldered on) and then a single hookup to the card. [/quote]

Nice bit of engineering / creativity in getting so much more out of Leo's board!

The next time you're working under the hood on that, if you want to increase the reliability a bit, you could connect up the other end of the ground chain to the card as well. That way, a single break in the ground chain doesn't take out a bunch of your switches/controls. [and no, that's not what a ground loop is... ]

(You know it will happen at the worst possible time...)

Good one, thanks for the tip. Can't believe I didn't think of it!