and you thought fish were fun!
well not if you give a goldfish a hammer! imagine being a goldfish, you sit in your bowl all day
watching the cats and dogs and birds of the household get all the love and
attention from their humans and so you get envious, that's why goldfish are
best left alone in their bowl, and if they ask for a gun, a rope or a powered
exoskeleton you should reply ‘no’ but mad scientist Neil Mendoza is really bad at saying no to
his goldfish, so he gave the finny little guy exactly what he's been asking for
since Christmas '14- a hammer of his very own,
Neil's Fish Hammer Actuation Device uses a camera to track
the goldfish's movements and drops the hammer when Smashie rotates in place:
As Smashie swims around the aquarium, his position is
tracked with a webcam, using software written in C++ using openFrameworks and
OpenCV. The hammer follows him around the tank on a carriage powered by an
Applied Motion [applied-motion.com] stepper motor. The software calculates the
velocity that the motor needs to be moving using a PID algorithm that takes the
motor's encoder position as input and gives a velocity as output. This velocity
is then sent over UDP to the stepper motor. The hammer head drops based on the
slow rotation of a cam that the hammer rests on.
The Fish Hammer was designed using Autodesk Fusion 360 and
Autodesk Inventor, so if you want to give your goldfish a special present for his or her birthday or Christmas, instructions on how to build your very own Fish Hammer
actuation device are at instructables.com/id/Fish-Hammer-Actuation-Device, this
project was created as part of Autodesk's artist in residence program, imagine, give a goldfish a hammer, they will be wanting bicycles next!
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