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Unread 11-02-2011, 13:22
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Re: How should we wire the photoswitchs?

Quote:
Originally Posted by Hugh Meyer View Post
Kent,

You may want to consider powering it with 24 volts. One of the updates makes it legal by connecting the sensors to a solenoid output on the cRio and powering that module from the 24 volts from the PDB.

Previously in this thread I posted a plot of typical voltage during a match. The sensors are good down to 10.8 volts and we regularly see voltages below that.

Attached is the data sheet that shows the working voltage range of the sensor.

-Hugh
Hugh ... thanks for the feedback. I did see that update and thought about doing just that, but then figured that:

1. Calibrating the sensors without the robot being enabled to power up the Solenoid module would be a challenge.

2. We are only using the sensors in Autonomous where our battery would be at its highest - hopefully not dipping below the 10.8 during that time.

3. If we do have problems after testing for awhile - we can easily relocate the power feed to the cRIO module.