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Type: Posts; User: DrM

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    Hi, it is a SMT design. So you have to have the...

    Hi, it is a SMT design. So you have to have the actual board. I am interested to make some more if there are a few people to help dilute the assembly costs.
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    The board described in this thread was designed...

    The board described in this thread was designed to provide high precision low noise signal acquisition, waveform generation and digital I/O in a programmable board with an open API that interfaces...
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    @FHorn I am a little bit familiar with NI, and...

    @FHorn

    I am a little bit familiar with NI, and I am not a fan. Moreover, with their focus on expensive software (400/year to 5K/seat plus fees for deployment), it is not easy to see why they...
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    @notthetup Yes, it was the mccdaq and the...

    @notthetup Yes, it was the mccdaq and the labjacks, that led me to feel the need to do this. This is better than any of those, for a few reasons.

    Here are a few of the specs that I was...
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    Hi Paul, the twitter response seems promising. I...

    Hi Paul, the twitter response seems promising. I plan to ask for a quote today for a small production run. Will let you know how it comes out.
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    Great, thank you. I see two replies already, the...

    Great, thank you. I see two replies already, the first might be talking about a pci/pcie board from general standards, they usually go for 5-8 K$.
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    It takes me about four hours to build one by...

    It takes me about four hours to build one by hand, with tweezers and a magnifier, and then a few minutes in a small reflow oven. Having the pcb service that I regularly use, do the assembly for a...
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    So, can we talk? I emailed you my contact info.

    So, can we talk? I emailed you my contact info.
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    And yes, of course, I did plan to produce and...

    And yes, of course, I did plan to produce and sell the board, and would be happy to do it if there is interest. I think there a lot of researchers in science and engineering who would benefit.
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    I am happy to publish the python gui, and...

    I am happy to publish the python gui, and probably the firmware that runs the board as well. The intent is that it be a flexible instrumentation grade DAQ interface and still be very affordable. ...
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    Hi Paul, I have one extra board. I am probably...

    Hi Paul, I have one extra board. I am probably going to use it in the lab. Can we talk off-line?
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    In fact, the noise that I reported for our design...

    In fact, the noise that I reported for our design in #6 above (0.05 mv to 0.08 mv), does not change when I run other interfaces at the same time. It stays in the 10^-5V range.

    In the picture in...
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    DAQ vendors in general are miserable sources of...

    DAQ vendors in general are miserable sources of DAQ software, and very few are conscientious even about their hardware.

    That in part, is why I built this. I needed a system with strong...
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    The GUI is written in Python, and I have run it...

    The GUI is written in Python, and I have run it on Linux, Windows 10, and Windows 7, and desktops and laptops for each. I have not seen any crashes.
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    A few weeks should be easy. Assuming careful...

    A few weeks should be easy. Assuming careful design, the limits are usually storage, cooling and power.
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    USB DAQ with Teensy - Noise measurements

    Here are signal and noise measurement for the four inputs in 16 bit mode, with the first three channels unconnected, and the output from the DAC set at 1.0 V and connected to Ain3. Notice that the...
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    Here is a capacitance measurement, it was made by...

    Here is a capacitance measurement, it was made by measuring amplitudes as a function of frequency. The parallel resistance refers to leakage current.

    In addition to the conventiional DAQ...
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    I am indeed willing to share. This is a screen...

    I am indeed willing to share. This is a screen shot of the python GUI that we use for testing our solid state lighting devices. You'll notice that it is pretty quiet, even though I just now ran it...
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    I want to add that the noise performance for the...

    I want to add that the noise performance for the Teensy DAQ board is better than 0.1 mV.
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    [queued] USB DAQ with the Teensy

    Working with a senior instrumentation specialist, we have implemented a USB DAQ module using the Teensy 3.2, with analog circuits designed around the electrical characteristics of the Teensy ADCs and...
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