Replying to two posts here, myself <G> Rehmi Post wrote: > <snipped> > > [The other option:] The octagonal mirror and a row of 120 LEDs. > > Don't use a polygonal mirror -- it's a lot heavier than a resonant, > counterbalanced one, and you'll have to deal with wearing a head-mounted > gyroscope. Use an optical interrupter at one limit of the mirror's travel to > sense the beginning of a scan. Probably a good idea; I figured on counter-rotating something of equivalent angular momentum, which would solve the gyro problem, resonance is probably a better answer though. I am pretty willing to go for improvements <G> Definitely want to minimize the vibration of the headset. (Cost would probably be that the display eats more power, of course; gains in usability & reduced operator fatigue would be worth it!) > BTW, this is just how a Private Eye works. Except it has a row of 280 LEDs at > ~300DPI. Where can we get those arrays? I haven't managed to find such an array yet <G> I think that's a LED printer replacement part, if only I hadn't packed a few catalogs... Charles J Knight wrote: > <snipped> > > 20MHz clock. You > > can do just as well or better using a PIC or a Scenix chip. > > I don't have much in the way of *electronics* skills. I doubt *I* could > do > it. Anyone interested in making a prototype? If I wasn't already overbooked, moving this month, and looking for a job at the same time... <G> Another option is the Atmel parts, 4x as fast as the PIC parts for the same clock speed. The easiest cheapest part to program is probably the PIC16F84, there's a newer 20MHz model out I'm told, and the price isn't too bad - you can program 'em from a very very low cost programmer (which isn't true on all IC's!) I'll ask a friend, he may be interested. Mark -- 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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