Since the trigger is actually coming from a relay, do we need to worry about the bipolar input buffer? Probably not, but I thought I'd run it by. When the player "buzzes in" it fires a relay that locks the other players out, turns on a light in their "pod", and closes the switch that, until recently, turned on the doorbell. The human element is removed, but maybe that's not enough? If you think it would be better to have the buffer in there, I won't object.
I had a few other questions about the schematic just to make sure I'm on the same page. This list works from the far left:
1 - Just after the trigger, there's a line with an arrow to 12v. Is that a resistor? If so, what value? I assume it is, because without a resistor, that would create a short.
2 - The very next component is a Schmitt Trigger, right? I see the 4093 - do I need three of those chips? (
Mouser link)
3 - Directly above the 100n cap, there's another Schmitt that doesn't appear to be connected to anything but ground. Does the other side go to something?
4 (last one!) - that funny looking cap (I think?) just after the diode that I think is labeled 10416v…I can't seem to find that part anywhere. Is that just another 100n, or is it something special?
Thanks again…this thing is going to be so cool!