11-26-2014 10:41 AM
So I have been trying to create, or find a pre existing VI, of an Oscilloscope that allows me to wire in the voltages that it reads, like from a DAQ card. So far I haven't had much luck. Any ideas?
11-26-2014 10:43 AM - edited 11-26-2014 10:44 AM
@winterfresh11 wrote:
So I have been trying to create, or find a pre existing VI, of an Oscilloscope that allows me to wire in the voltages that it reads, like from a DAQ card. So far I haven't had much luck. Any ideas?
I have an idea. How about telling us what kind of scope it is? (Make/model) 😉
11-26-2014 10:48 AM
I don't have a Oscilloscope, I'm trying to make one on LabView or find one that lets you wire in your own voltages from a DAQ card.
11-26-2014 11:01 AM
@winterfresh11 wrote:
I don't have a Oscilloscope, I'm trying to make one on LabView or find one that lets you wire in your own voltages from a DAQ card.
Sorry - I thought you were trying to make a real Oscope work with LabVIEW! Wat have you tried so far? It seems all you need is a chart to display your data?
11-26-2014 11:08 AM
Essentially yes, all I really need is a waveform graph that displays my data. I have this but the problem is that it isn't triggered so my data flows through the screen, its not stable in one place like an oscilloscope. Its very simple but it works.
11-26-2014 11:19 AM
@winterfresh11 wrote:
Essentially yes, all I really need is a waveform graph that displays my data. I have this but the problem is that it isn't triggered so my data flows through the screen, its not stable in one place like an oscilloscope. Its very simple but it works.
AH, you want a "Waveform Chart" with the "Chart History Length" set to the number of samples you want and an update mode set to "Scope Chart"
(Then read smaller chunks at a time so the chart actually updates at a pleasing rate for the user)
11-26-2014 11:36 AM
Thanks!, that seems to be closer to what I want, but how would you trigger it to just read on section of the data so the data isn't constantly moving across the chart?
11-27-2014 02:24 AM
Try the trigger detection VI: http://zone.ni.com/reference/en-XX/help/371361L-01/lvwave/basic_level_trigger_detect/
11-27-2014 02:46 AM