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Unread 09-04-2009, 12:06
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FRC #5148 (New Berlin Blitz)
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Re: Using the cRIO to control custom lights

Quote:
Originally Posted by Russ Beavis View Post
I'm with Eric. Use the 9472 relay module and PWM its outputs. Each output is rated for 750 milliamps and should be capable of switching at over 1kHz (ie faster than you can see).

You can parallel output channels on the 9472 up to a total of 6 A. Just make sure to switch all channels at the same time. The module is rated for a switching rate of up to 10 kHz.

However, rather than take a chance of blowing up a cRIO module that is much more expensive than a speed controller, I think I would probably use the cRIO to supply a PWM signal thru an optoisolator to a simple power transistor circuit to do the actual switching of the lighting load.
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