I'm involved with an amateur theatre company (I do lighting, audio etc...) and would like to simulate a switch short-circuiting. I have also done a bit of magic in my time and have used "spark ejectors".
Because I would like to build something in to the scenery, I'd quite like to build a custom spark ejector (that I can then fill with flash paper and "sparkle additive" and power with 1.5V AA batteries, just like in the commercial versions). Looking at the commercial hand-held devices, they seem to be a fairly simple coil underneath the chamber that you then load up with the "payload".
Does anyone know of a tried-and-tested circuit diagram which would let me do this? I've done quite a bit of work with MCU's in the past and am well aware of the potential safety issues with these devices!