Can I use "possible" for controlling a piston which shuts off burning box?
There can be problems like not enough inputs, too full output slots. Will the state be "impossible" when there are such problems?
The "possible" detector on a machine is lit when and only when it really makes sence to supply it with power. That is, when it either has all the valid items for a recipe in its input slots, its output slots aren't full of garbages, and is just waiting for power. Or when it is currently doing a recipe using power.
The "running" detector on a burning box is lit when it is on fire. Your goal probably is to activate an automatic igniter when the machine is "possible" AND the burning box is NOT "running", and activate a piston to put off the fire when the machine is NOT "possible". Good luck designing your circuit. It isn't easy at first but is definitely doable quite compactly
By the way, Greg. At first I thought that I could use the "Auto Redstone Machine Switch" to control my Matter Replicator so it replicates one and only one Iridium ingot when I give it a redstone pulse, no matter how much matter is in its input tank. But actually it doesn't work as I expected because when the machine finally finishes replicating the ingot, the cover doesn't detect that (because the machine is still in the "possible" state due to the excess matter input), and the machine returns to its long long, Long, SERIOUSLY LONG work for the next ingot to replicate. I guess I can use the "success" detector in combination with other kind of covers in this case but wasn't really sure if it was how it's supposed to work. Was it your intention?
(I'm doing it with 4 amperes of HV lasers. No, I don't have enough power generation rate to do it with EV or even IV!)