Ignition Control to Distributor

I saw a schematic once on the electronics inside the boxes.

One of the wires in question was grounded in the box the other went to transistor or the like.

That lead me to wonder if you could trigger the electronic box by momentarily grounding the un grounded of the two leads?




Here is the schematic I was referring to.


It came from this site

Whats in the orange box ?

If you look at the D post it goes to ground.

And with the diode on the C pin only a path to ground can be made by the pickup coil.



I can only assume the author knows what he is talking about.