November 2008
Intermediate to advanced
192 pages
8h 32m
English

Photography by Wayne Holder

Make your own scent output peripheral from a piezo air freshener.
Not long ago, my 11-year-old daughter Belle wanted to create a gadget that would amuse her dog Panda by dispensing different scents for him to sniff. I had no idea how to control the dispensing of fragrances, so we took a trip to the local pharmacy and checked out the electric air fresheners.
Most of them diffused fragrances with heat or fans, but one, the Glade Wisp, claimed to use a microchip to “automatically puff” ...
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