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 Unfortunately our team missed out on a great opportunity to "learn from the pros" because we did student-centric things like insisting on having a student field coach. - Tom Bottiglieri [more] |
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#4
12-10-2009, 14:08
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Re: Building a Solar Parabolic
About 50 years ago an engineer at TI invented a 4 quadrant sensor, used for guided missles.
Same concept  up/down difference = (sum A + B) - (sum C + D) left/right difference = (sum A + C) - (sum B + D) You need 4 light sensors you could do the whole thing in analog electronics, op-amps and such, OR do it all in software using 4 A/D channels on a processor, like an old robot controller. 
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