You don't need a rotation sensor, you need a G-sensor, if it is called that ...something that measures the outward acceleration from the inside of the frisbee to the outside, that is how the yo-yos work, there are spring loaded weights near the center, and as you spin the yo-yo faster, they roll outwards, connecting the circuit and lighting up.. should be pretty easy to build into a frisbee... Kinda, on topic... I have seen a frisbee that had maybe 8 leds vertically on one side, and when you throw it, it perfectly spells out words, in this case 9 letters including a space. which has to have a sensor of sort to measure the speed.. similiar in design to the P4 or that T-Disc thing people were talking about a while ago. Bryan On Wed, 13 Sep 2000, gl wrote: > > A little OT, but some of you electronics gurus will probably have some good ideas on this one. > > Basically I want to customise a frisbee with battery-driven LEDs in various places. I want them to light brightest as the frisbee is thrown, with the light intensity related to the rpms of the disc. > > So basically I'm looking for an ultra-compact and light rotation sensor component to act as a resistor. Of course accuracy is largely irrelevant, but as I'm planning to mount the sensor and a watch style battery at the bottom center of the disc to minimize the effect on the aerodynamics, small weight and size are paramount. > > Is there such a thing? Or can anyone think of a way to hack something to get the same effect? For example, how do the lit up yo-yo's work (they do exactly what I'm after come to think of it)? > -- > gl > -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org
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