TechTeach - A Quick Guide To National Instruments USB-6009 and USB-6008 Multifunction I - O Devices | PDF | Input/Output | Signal (Electrical Engineering)
GitHub - jpleitao/PyDAQmx-Interface: Interaction with National Instruments boards NI USB 6008 and NI USB 6009 using the official driver and the PyDAQmx python 2.7 implementation
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