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Originally Posted by scottm87
Just a heads up... You cant use the gyro from last years kit (very clear... see the QA id's #341, 346, 190). Therefore, you have to use a different one under the custom electronics pricing. The only real viable option is the ADXRS series from Analog Devices, and if you need more then 150 deg/sec, then it will get much harder (the Evaluation Board version of the 300 deg/sec model is just barely over the price limit... you will need to mount 300 deg/sec yourself). Nobody made it very clear in the previous posts, and I didnt know what gyro you were using to begin with.
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We are planning to use the ADXRS300EB. It's the same price ($50) as the ADXRS150EB, at least from some suppliers, and was in stock at the time I checked. I'm supposed to have it in the mail tomorrow. I found the $50 price at analog.com (in stock) and avnet.com (not in stock but was a few days ago). Digikey sells it for $75 but it's out of stock. Future-active sells it for $100.50, just over the limit. But the rules don't say where you have to buy it, just that it must be available from one of the preferred suppliers. So buying at $50 from somewhere else is fine by my reading.
For development, we used the BEI unit from last year. Except for a different scale factor, the software should be the same, except also that the AD units saturate at much higher rates (that's goodness) and have corresponding less resolution (badness but not significant to me). So even though I won't have the AD unit before competition, we'll change the wiring and socketing for it today, and hopefully I can just plug it in at the competition, change a constant, and be up and running.
Bill