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Re: Why does the gyro need the ADC?
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Originally Posted by KenWittlief
the full scale output of the gyro matches the full scale input range of the ADC: 0 to 5V.
Darlingtons have very high gain. Depending on where you centered the bias you would greatly expand a small portion of the gyros output, and cause the rest of its signal to be over or under the range of the ADC.
If you want a more sensitive gyro there are different versions available.
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Two of the more common ones used are the Analog devices 150 and 300 degree/second models. The 150 has a smaller range of measurable rotational velocity, but twice the resolution. Since 150/2.5 = 60 degree/second per 0.1 volts whereas the 300 degree/second model has a greater operating range, but half resolution of the 150 since 300/2.5 = 120 degrees/second per 0.1 volts.
I used 2.5 because half of the range is one direction (above 2.5v) and the lower half is the opposite direction (below 2.5v)
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Matt Krass
If I suggest something to try and fix a problem, and you don't understand what I mean, please PM me!
I'm a FIRST relic of sorts, I remember when we used PBASIC and we got CH Flightsticks in the KoP. In my day we didn't have motorized carts, we pushed our robots uphill, both ways! (Houston 2003!)
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