I really like fireworks, as most adult men d0, but for me pyrotechnics has a special place in my heart. I remember the first time I saw an electric ignitor work. I was a young boy scout and one of the adults used some with a remote control to ignite large bonfires at the State Park I lived at.
It was magical to see someone wire a bunch of tiny little wires to a radio receiver and later press a button and cause a huge fire to “whoosh” into existence. From that point I was hooked.
Now as a prepper, what I can do with pyro and stay legal is limited. Most homemade fireworks are for entertainment only if you want to stay on the right side of the law, but some skills are transferable, and I am sure that with a little thought a smart person could find a use for these DIY ignitors. Personally I think they would work good with black powder mortars, but I am still fighting with the wife for my cannon….