# Electronically triggered banger, pop thingi

#### Tom Richardson

Joined Nov 6, 2018
6
I'm essentially making an escape game and am trying to find indoor safe pyro effects, very little bangs really (like a pop cap, maybe a spark or two), that can be triggered by sticking 5 or 12v through them, seem surprisingly hard to find. I could use a capacitor or something of course, but it has obvious drawbacks! There are ignitors I've used for fireworks before, they could set off a cap or something, but I'd rather not have something that could cause a fire... There must be something purpose made, perhaps for the film or theatre industry and not £100 per pop?!!

Could anyone point me in the right direction? Would be great if possible, my googling has failed thus far!

#### djsfantasi

Joined Apr 11, 2010
7,689
Look for “recordable sound modules”. The ones that are used in greeting cards. Amazon carries several choices. They can be purchased less expensively than Amazon. Then, record your pop, bang, explosion or whatever you want. If you want a louder sound, feed their output into an amplifier with a large speaker.

#### KeithWalker

Joined Jul 10, 2017
1,779
Use a camera flash tube synchronized with appropriate explosion sounds.

#### Tonyr1084

Joined Sep 24, 2015
5,969
Several years back I got curious about HHO (Hydrogen - Hydrogen - Oxygen) generators. The first one I made was in a soup can as the negative electrode with a wire mesh in the middle - insulated from the can using popsicle sticks. A little baking soda and a small 12V transformer with a rectifier. It produced a foamy surface to which I struck a match and got an ear ringing pop. It wasn't a big pop but it was loud enough to ring the eardrum.

I would imagine using the can as one of two spark electrodes you could position it so that when discharged, a spark can jump from the tip to the can. Passing through the foam it will ignite the HHO and give you that pop on demand effect. And there would be very little chance of fire at all. No debris and no flying objects. AND it could be reused over and over without having to fuss with fuses or powders.

OR the other route a flash bulb and sound effects.