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Unread 28-01-2011, 15:19
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Al Skierkiewicz Al Skierkiewicz is offline
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Re: Control of Decorations (Led displays)

David,
The interface you linked to is simply an add on module to the NI 9472 Crio module that came in your KOP. Each output can be accessed through the linked interface using PWM style connectors. The 9472 module has certain current limitations, 0.75 amps per output or 6 amps total for the module.
The Spike can handle significantly more current. However, I have yet to see a robot design that would require a large number of solenoids firing all at once from the same trigger signal. Since the Spike can handle currents up to 20 amps total (it is fused for 20 amps) it is commonly used for controlling higher current loads. Teams have used them to control decorations in the past. If you are proposing just one 30 ma LED, it is an overkill for the Spike I know. Unfortunately, there is no convenient way to power the LED through current hardware. I would ask the question of the Q&A as I don't remember this particular application has been approached before. Ask if you can use the solenoid module (9472) to drive LED loads and ask if you can use a relay or digital output of the digital sidecar to drive a custom circuit that would power the LED. (A simple transistor would suffice for the later.) I don't remember any rule off the top of my head that would prevent either, but will check later when I have more time.

BTW, the linked module is required to interface to the NI 9472 that came in KOP. There is an interface module included in your KOP.
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Al
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www.wildstang.org
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Last edited by Al Skierkiewicz : 28-01-2011 at 17:33. Reason: Two solenoids is not correct.
 


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