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Unread 18-01-2009, 15:50
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Tanner Tanner is offline
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FRC #1261 (Roblions)
Team Role: Programmer
 
Join Date: Jan 2007
Rookie Year: 2007
Location: Suwanee, GA
Posts: 311
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Re: Noisy Accelerometer

Quote:
Originally Posted by jee7s View Post
To reduce this problem, it would be best to locate the sensor near the controller to minimize the wire length. Also, avoid putting any major power supply line near the sensor. Consider shielding the sensor and the signal lines as well (an antistatic bag with an open end is not a quality shield).
What types of shielding would be used to shield the sensor? I know what we can use for the wires, but don't know what we'd use for the sensor.

Quote:
Originally Posted by Russ Beavis View Post
It doesn't sound as if you've run the "up on blocks" test that I recommended - lift the robot off the ground and electrically spin the wheels. In this configuration, you should read zero acceleration (with the exception of gravity and any vibrations that couple the motors to the accelerometer).
Yeah, we ran that test yesterday, one of the first things we did. In that configuration we still had the noise (which probably just reinforces the fact of noise going through the motor wires).

Quote:
Originally Posted by EricVanWyk View Post
Is the LED on the analog breakout lit?
Yes, the LED in the analog breakout is lit.

Think we'll order another sensor or two, if this is the way we'd like to go.

Thanks
-Tanner