So I am wanting to build a remote igniter system for model rockets among other things. and I have picked up most of the parts already just lacking a box. I am contemplating a second battery holder in series to bump it from 6v to 12v. but here is a schematic I drew up real quick and you more experienced than I can trouble shoot, ask questions, make suggestions, and tear me apart if you feel necessary.
I rotated this before I uploaded it and it still uploaded sideways I will try and fix that but until then here it is