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Unread 10-02-2003, 09:47
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Chipawa Chipawa is offline
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AKA: Mr. Tucker, AKA Chip
FRC #1111 (Powerhawks)
Team Role: Mentor
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Annapolis, MD
Posts: 41
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Current Monitoring w/ LEMs

Question for you all...We are trying to monitor our drive motor currents using LEM hall effect transducers. We are a rookie team and are following guidance from a white paper written by Steve Bunning, a mentor for Team 620.

The paper mentions powering the sensors from Pin 1 on the analog input to the robot controller. This pin is +5 v for "Gyro." The other 5v pins do not have sufficient drive to power the sensors. The analog input connector only has one pin for +5v for Gyro.

My question is how would we power multiple current sensors if there is only one pin that provides enough power for the sensors? Options that come to mind are to try the other 5v pins and see if they work, gang two wires off of pin1, or build some sort of custom circuit.

If anyone has had to deal with this, I'd appreciate any advice. Many thanks.

-Chip