Quadrature optical encoder built from a mouse: "
mouse salvage

Everyone has at least one extra mouse laying around; why not get some use out of it? Disassembling the mouse you can

get two optical encoders plus four infrared emitter/detector pairs. Then you can reassemble your new sensors into a

quadrature incremental optical encoder. You'll be able to tell how much the sensor has rotated and by comparing the

signals from the two IR pairs you can also determine the direction. These cheap devices would be good for keeping track

of robot wheel movements or doing absolute positioning telescopes.

thanks [joelanders]

(Via hack a day.)

Rixome, become a walker: "rixome is a network and a tool that turns mobile screens into windows that show the virtual and public dimensions of our point of view.

madrix_final_b[1].jpg

A walker (a rixome user) can see on his/her mobile phone/PDA/laptop screen the virtual interventions that have been added to the location where s/he now stands. For example, a spoken message can be left on a given location for other ‘walkers’ to hear through headphones whenever they pass by. The message can also be written, or it can be a 3D animation or image, a photography, a drawing, a video.

Remote rixome users can also check via Internet the traces left by others but s/he won't be able to add an intervention similar to those published in situ.

Developed by gelo for his at Master of Art and New Technologlies at the Universidad Europea de Madrid.

Via del.icio.us.

"

(Via we make money not art.)

USB rotary channel changer: "
rotary switch

Kentaro Fukuchi originally built this simple controller for an art installation. He needed an easy way for visitors

to switch effects on an EffecTV system. To avoid writing device

drivers he canabilized a cheap game pad. There were 16 available buttons but only 12 were needed. Once the rotary

switch was wired to all of the buttons he could use simple scripting to grab the button press events. You could use

this to control a variety of things and Kentaro gives a couple possible ideas on his site.

(Via hack a day.)

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