Automatic air fresheners practically beg to be hacked apart thanks to the servo motors and timers inside. One photography enthusiast demonstrates how to hack apart a Glade air freshener to build a remote camera trigger.
Tinkerer JCoPro pulled apart a Glade automatic air freshener to see what was inside. Once he gutted it he realized the mechanism inside could easily be repurposed as a remote camera trigger. A little hacking and a plywood bracket later, and he had a functional prototype. Hit up the link below for instructions, photos, and videos.
Trigger Your Camera Using Automatic Air Freshener Parts [JCoPro via Hack a Day]