Summary

I put this together to automate some air fresheners, but you could fit this to pretty much any aerosol can and drive the servo however you want.

Remote controlled air horn?

Motion sensing Fart Spray?

The rings on their own fit a 66mm diameter can, but if you print four of the spacer ring parts, it will hold a 58mm can nicely. I will get around to adding more spacers of different sizes as I come across cans of different sizes.

EDIT: So, I tried using this thing on some BIG and HIGH OUTPUT cleaning supplies type air fresheners... It turns out those things have something of a recoil! So, I'm uploading a design for stabilizing base.

EDIT: Adding design for a wall mounting bracket, print two rings (and spacers if required). This provides two adjustment points, one to tighten the rings onto the bracket and one to tighten it onto the can.