Multifunction DAQ

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Amplify the power of the DO signal.

What is a good cheap way to amplify the 5V DIO signal to 5 watts at 5-30 V?
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Logic Level Mosfet from Digikey connected to an external power supply is a solution.
http://www.digikey.com/scripts/us/dksus.dll?Detail?Ref=39714&Row=212515
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