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How generate two pulses per cycle? PCI-6251/6255
Hi. I want to generate two or more pulses per cycle like the timming diagram. This pulses will be used to trigger sampling data. I'm ussing the PCI-6251. The examples VI's for counter outputs can easy...
View ArticleImplement a timer on a PXIe-6361
I need to implement a timer using one of the Counter/Timers on a PXIe-6361 Multifunction DAQ module. I find no help on the NI web sight for implementing timers. I assume from studying the X Series...
View ArticleNI 9401 9174 chassis multiple quadrature decoders
Can a single 9401 digital IO board be connected to more than a single counter (for quadrature decoding) in a 9174 chasis using Measurement Studio (not Labview VI) and ContinuousInputDaqComponent...
View Articlecounter timer recording memory
I have a USB-6289. I am presently using it as a counter. I want to do the following. I want to record the counts in memory at a rate of 400Hz. I want to be able to store this data in memory for 10...
View ArticleHow to communicate with 2 boards PCI-6601
I worked with PCI-6601 using 4 channels for counters. Now I need more channels and buy one more board PCI-6601. Now to address to the second board? How to switch between the boards?
View ArticleQuadrature not working for linear encoder
Hello All,I have an application where I acquire counter signals from a flowmeter. This flowmeter has A and B signals like a traditional quadrature encoder.Theese signals are wired to a PCIe-6612...
View ArticleUSB 6211 with 2 Encoders labVIEW Interface
Hi, I am trying to use 2 encoders (780251-01) to measure shaft rotation of 2 shafts to assure that they are rotating at the same velocity. The encoders I plan on using are 780251-01 with a NI USB...
View ArticleNI PCIe-6321 PWM Generation
Hi Everyone, The NI PCIe-6321 X-Series board has 4x general counters, which can be used for PWM generation. However, when conducting tests using the attached VI we were unable to general PWM signal...
View ArticleOven control
I am trying to control 5 heaters independently through PWM of stand alone SSRs with feedback from five sensors (RTD or Thermocouple) and need to detemine which modules I need with a Cdaq. I have a cdaq...
View ArticleEnable Debounce Filter in Signal Express
Hallo everybody, I want to measure the frequency from a rotary encoder but I the enviroment is electromagnetical noisy. The encoder is near an inverter and as a result the proper measuring of the...
View ArticleLED Blink Elapsed Time
Hello everyone,I'm making a measurement of heart rate using PPG. The LED will blink synchronously with the heart beat. The problem is, i want to make the first blink of led start the elapsed time and...
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200010 warning at DAQmxStopTask.vi
Hello! My task is to measure some random TTL pulses of 50ns smallest period from the photodetector (PD) while it's gate is opened for a particular time only when a motor, on which a head of the PD is...
View ArticlePreprocessing for DAQ Counter Input
Greetings,I am using an NI DAQ device (USB-6431) to capture angular motion via a three-channel optical quadrature encoder. I have constructed my LabVIEW VI with DAQmx VIs to configure my DAQ (I'm using...
View Articlehelp daq arduino
good afternoon I need a help of as to transform this one I vi in one I subvi then to use in one interface interface graph that I am developing,attached file of labview to help me
View ArticleDo I have to use an external clock with a cDAQ-9188 and NI 9401 to read a...
We can set up a task that works on demand but when we go to continuous sampleing we see Error -200303, which claims an external sample clock source must be specified for this application. However,...
View Articlesimultaneously generation and measurement of pulse
hello every one,i am generating a pulse for specific time.Now I want to measure it within same daq card.I have made Vi for it but it has some error.I have USB daq-6343.I am attaching my Vi here.The...
View Articleconvert counter rate to DC analog
hi,all I use PCI 6601 and NI BNC-2121 to count the pulse from avalanche photodiode( APD,PerkinElmer SPCM AQR 14). The photon intensity detected by APD can be displayed on the labvew software. It...
View ArticleRate of Fire
We are looking to create a program that will allow us to calculate the rate of fire of a firearm. We will be using a cDAQ 9174 with a 9233 or 9234 module (have both).The DAQ will be looking at data...
View Article40kHz ultrasonic pulse and time it take to receive the Pulse.
Hi, i have developed the following circuits: Tx: a Circuit that generates a 40kHz frequency using an LM555, the LM555 is wired to an AND gate which when using the test panel on MyDAQ(6216) i set...
View Articlefilter pxi-6602 LabVIEW DAQ-mx
Hi, I have a PXI-6602 card.The signal to measure is on the gate pin.On the source pin, it is the internal 20MHz.The counter uses the ND_BUFFERED_EVENT_CNT mode.I have a LabWindows code with NI driver...
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