Hello,
I am working on a home alarm system project, more precisely the smoke generator (FUMICUBE 100) triggering system.
it is basically pyrotechnic device to which you apply around of 1A during a short amount of time (around 5ms) to trigger it. Once triggered it produces a dense smoke that will make your place pitch black and impossible to navigate.
This is safety critical because it is annoying to clean up, expensive to replace and can also lead to dangerous accidents if it is triggered while any of my family member is in the house.
I have a basic schematic in mind, just a high side N channel MOSFET driven by a high side switch controller as followed:
but I would like to add something to prevent the mosfet to be triggered in case of a glitch. I would like to ad for example another mosfet to drive the gate to the ground by default so I would need to
put a pin high before even being able to command the main mosfet.
I'm more of a coding guy so I am aware that my solution might sound ridiculous or unfeasible but that's why I am here
Bye
Cassus