Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [daq]

Abbreviation of Data Acquisition system (aka DAS)

Data acquisition is the process of sampling signals that measure real world physical conditions and converting the resulting samples into digital numeric values that can be manipulated by a computer. Data acquisition systems (abbreviated with the acronym DAS or DAQ) typically convert analog waveforms into digital values for processing.

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3.5mm pluggable screw terminal, but male side PCB mount

I have a few NI USB-6000 DAQs with a 3.5mm pluggable screw terminal. I want to used them in battery prototyping so I'll need to build a few unity gain differential opamps for cell voltage monitoring among other circuits. I'd like to have my PCB…
Omagasohe
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What is the true measurement duration for each sample made by a DAQ?

When a data acquisition system digitizer (DAQ,) or analog-to-digital converter (ADC) samples a continuous signal, how can one estimate the true measurement duration of the sampling action? By true measurement duration I mean the window of time…
higgy
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Where to connect case/USB shield to PCB ground?

I am currently designing a modular device for signal acquisition and signal generation. This is not a professional/commercial device. I am only building it out of interest and to learn. Nevertheless, the device should behave reasonably concerning…
Charly
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Can we connect a DAQ to a micro-controller via a CAN bus?

I want to establish communication between an Arduino to a DAQ that I am using from DEWESOFT called the Dewe 43-A. The DAQ has 2 CAN bus ports according to its specs, and I was wondering if I can connect it to an Arduino using them via a CAN bus, or…
Khushi Singh
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Data acquisition wiring - How to deal with extreme noise?

Hi all, I'm trying to build a portable data acquisition system to gather readings really close to high voltage powerlines. I was hoping to get some advice on how to achieve the best noise immunity. Here's my current plan: I have a sensor with 4…
Alex Colbourn
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Error in the gain, Amplifier, DAQ system

I have a strain gauge with maximum output of 5mV. I want to amplify this signal 1000 times in order to use my DAQ system to read it (the analog input range is 0-5V for DAQ connector). I have purchased a MAX9613EVKIT+ (schematic below). The default…
Arash
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Calibrating DAQs

I'm using some of National Instruments' DAQs for some measurements, but their calibration is slightly off. To work around this I am hoping to factor in any imperfections into the measurements such that they can be removed. The objective is to find…
loudnoises
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NI myDAQ behaving weird, not measuring inputs after some random time period

I am using the National Instruments myDAQ with MATLAB (using the Data Acquisition Toolbox) to generate a sine wave at defined frequencies at one of the output channels. The output channel is (effectively) connected to a resistor which then goes to…
shreyas
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How could I give a square wave input to a circuit using NI-DAQ-USB-6001 and LabView? How could I read the peak to peak voltage using DAQ-USB-6001?

I need to give a square wave input to my filter circuit using Ni-DAQ-USB-6001 and LabView. Could someone help me with how can I do that? I also need to read the filtered wave and peak to peak voltage coming out from the filtered circuit using…
DevanshS
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Detecting a location of the needle inside a cavity having multiple IR emitters , using IR Detector at the tip of the needle

I am working on a project where I need to find the location of a needle that has the IR detector at the tip of the needle. These needles are medical suturing needles that would help us to detect the position of the suturing needle while suturing.…
DevanshS
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Strange Waveform Using FPGA with NI myDAQ

I am testing my Microsemi FPGA with a NI myDAQ and am getting some strange waveforms. All that I am doing is inputting a 3Vpp square wave at 10kHz and expecting the same output since my code is just setting the output to the input (shown below).…
yer
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Avoiding ground loops with common-ground DAQ

I am looking to acquire data from several sensors on a machine, each of which are part of a control system featuring several grounds linked at a single central point. I need each sensor's signal at the point of measurement compared to its own ground…
J Collins
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How to do multichannel ADC data logging

I need to build a system to monitor several (around ~20) voltages over several days. The ~20 voltages need to be measured differentially. Something which could in theory be accomplishes with 3 of these picologgers. I was wondering, what is the state…
Ken Grimes
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Raspberry Pi and FFT (Fast Fourier Transform) -- Using MCP3208

EDIT: I've made adjustments based on your answers, while I couldn't get it to be evenly spaced, I managed to get a better curve with more samples per cycle. Turns out I need to remove the print function from my program so that the Pi could focus…
Hazman Hussin
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Capacitor across Vlo and Vhi on DAQ, switching power supply

I have a switching power supply (RC Esc). I am measuring the input voltage from battery using a voltage divider. The Divider is attached to a differential DAQ. I have very large transient spikes in both the voltage and current (current shunt). …
donrafa7
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