While tinkering with his lucky cat or maneki neko, Martin Fitzpatrick decided to go a bit further and play around with it a little bit more. What he produced is an amazing build of a lucky cat that displays a message with its spinning arm.
The display uses the persistence of vision effect to generate an image 'in the air'. By repeatedly outputting light at a specific point in the rotation, and with a short enough cycle time, the viewer's eye does not register any change in brightness.
Managing to generate a static image depends on hitting the exact same point on the next turn around the loop. By adding a slight over- or under-scan you can make the message display rotate.
He also explains his process of building and programming the lucky cat so that it shows the message "Hello Python".
(Image credit: Martin Fitzpatrick/Imgur)
Newest 1 Comment
Cool. Our favorite Chinese restaurant has one of those on the front counter. We wave hello and good-bye.
Abusive comment hidden.
(Show it anyway.)