A.1. Basics of Sending and Receiving Circuit Voltages
The following is based on a National Instruments PCI-MIO-16E-4 DAQ card (or equivalent). The sample rate is not critical. The DAQ card has eight differential analog input channels and two analog output channels. We generally use only channels 0, 1, and 2 for receiving in our projects.
LabVIEW provides some preprogrammed VIs for readily sending voltages to the circuit board and sampling a signal for reading into a LabVIEW program. The most important of these for analog circuit measurements are AI Acquire Waveform.vi and AO Update Channel.vi. Some measurements will be made next using these two VIs.
As the name suggests, the VI, AI Acquire Waveform.vi samples the stipulated voltage a number ...