Servo Magazine ( May 2009 )
Computer Control and Data Acquisition: Part 3
From the previous two articles, you learned how to output and input digital signals using National Instruments LabVIEW software and their USB-6008(9) hardware. However, the signals have only been in the TTL range of voltages (0V and +5V) and with fairly low current levels, 8.5 mA maximum per digital terminal. In the real world outside of the PC and the USB-6008(9) units, voltage and current levels are typically much higher and also include AC signals. This article will demonstrate some of ...
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