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    I saw a note above somewhere asking if the...

    I saw a note above somewhere asking if the transistor is important. The answer is yes. Alternatively an opamp with a sufficient slew rate should be good. Given the sensor performance, it can be...
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    One more question, I think. Are you using the...

    One more question, I think. Are you using the logic inverter with your code? Would there be any issue in wiring the digital pins from the Teensy directly to the TCD 1304?

    Thank you
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    BTW, the bandwidth of the Teensy 3.2 ADC input, ...

    BTW, the bandwidth of the Teensy 3.2 ADC input, seems a bit tight for this. Do you see any issues with that? What do you think of doing it with the 4.0?
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    Thank you, I found that. Is there any reason you...

    Thank you, I found that. Is there any reason you chose TX3, RX3 rather than, Tx2,RX2 or TX1,RX1?

    The pairs on the side of the Teensy are a little more convenient for routing a pcb.
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    Hi Reim Could you include a listing, or a...

    Hi Reim

    Could you include a listing, or a diagram, to show how you connected the TCD1304 to the Teensy?

    Thank you
    M Nelson
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    Yes, I think so. My old installation ran the...

    Yes, I think so. My old installation ran the teensy loader from a separate directory. The current setup seems much better.

    I still have problems with the software complaining about running...
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    The answer is that you unzip the Arduino wherever...

    The answer is that you unzip the Arduino wherever you want it to reside, and the Teensyduino installer copies itself into that directory tree.

    There are some bugs, the ide opens and closes without...
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    I neglected to mention, it's a Linux machine. ...

    I neglected to mention, it's a Linux machine.

    That sounds like it will be installed alongside the earlier versions, is that correct? I supposed the desktop shortcuts will simply be overwrriten.
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    Updating the IDE and Teensy support

    Hi, I would like to start working with a new board, and so, it is finally time to update the development environment. But, so far I have not found instructions on how do that.

    Could someone...
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    That is good news that it recovers after cycling...

    That is good news that it recovers after cycling power. At least it's not a total brick at that point. Apart from that, I think we have a different context for what is risky and what is normal,...
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    Hi Paul We are again looking at deploying a...

    Hi Paul

    We are again looking at deploying a product with the Teensy board. This one would be pretty important for a social minded cause.

    And again, we are still stuck on the problem of what...
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    @PaulStoffregen Hi Paul, the need for a more...

    @PaulStoffregen

    Hi Paul, the need for a more deployable function for the button, has come up again. Is there still not adequate time or interest for this? Again, we need that the button result...
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    @PaulStoffregen Hi Paul, is there any chance...

    @PaulStoffregen

    Hi Paul, is there any chance of this happening?

    If you are too busy for this, if instructions and source available, perhaps one of us could have a go at it.
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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...
  15. This might be helpful for your project. It is...

    This might be helpful for your project. It is starts with low noise. I can probably help you with the signal processing also.

    ...
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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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    @tonton81 - No, that would not be robust for...

    @tonton81 - No, that would not be robust for deployment and you could not use it in a professional context.

    Think of it in terms of sending a board to the space station, or antartica, or a...
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    Defragster raises a separate point, he wants a...

    Defragster raises a separate point, he wants a "halt". He could do that by having a "halt" program ready to load when he pushes the button.

    I feel that "Reset" aligns better with what users...
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    Button, timeout and boot

    I would like to request a feature or enhancement, for the function of the button on the Teensy.

    After pushing the button, if a connection is not found to an instance of the Teensy Loader (on the...
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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?
  28. One of us (not me) taught the instrumentation...

    One of us (not me) taught the instrumentation electronics course for some decades, and now has instruments around the outer planets. We collaborated on the design and part selections. Notably, he...
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    What are the design goals and requirements for...

    What are the design goals and requirements for the 4.0? How does it differ, at a high level, from the 3.x boards?
  30. ADC performance, achieving 16 bits (or very close to it)

    In numerous postings it has been said that the limit for the Teensy ADC is substantially less than 16 and less than the performance metrics stated in the processor data sheets. However, measurements...
  31. Would it meet your requirements to have a similar...

    Would it meet your requirements to have a similar sort of board that has a mount for the teensy, and with fast high precision ADC's on it? I need to check the interfaces available on the teensy...
  32. if you like we can continue in email

    if you like we can continue in email
  33. I'll have to go back and see what we did, but as...

    I'll have to go back and see what we did, but as i recall, on the Teensy 3.1, the default vref is a filtered version of the VOUT33. I am pretty sure that 3.3V is our full scale at the input to the...
  34. Yep, the DAC is 12 bits. We run it through a...

    Yep, the DAC is 12 bits. We run it through a nice driver circuit, which you can see in the lower left part of the board, and indeed 12 bits is what we see.
  35. We're getting 16 bits at 300 ks/s. The data...

    We're getting 16 bits at 300 ks/s. The data that was listed in our thread is showing noise at less than 1 LSB at 200 ks/s.
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    I am getting 16 bits, using the on board ADC, and...

    I am getting 16 bits, using the on board ADC, and an instrumentation grade input design with surface mount parts.

    See this:

    https://forum.pjrc.com/threads/53173-USB-DAQ-with-the-Teensy
  37. Your requirement to acquire 16 bit data at 1, 2,...

    Your requirement to acquire 16 bit data at 1, 2, 10 MHz, seems to exceed the maximum sampling rate of the on-board analog input as listed in the data sheet.

    See...
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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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    See...

    See https://forum.pjrc.com/threads/53173-USB-DAQ-with-the-Teensy

    I get 16 bits, no problem. I use an instrumentation grade front end with some specific circuit design to deal with the Teeny's...
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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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    See my post at...

    See my post at https://forum.pjrc.com/threads/53173-USB-DAQ-with-the-Teensy

    Scroll down to post #6, the analog input noise is at 1 bit in 16 bits.
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    See my post at...

    See my post at https://forum.pjrc.com/threads/53173-USB-DAQ-with-the-Teensy
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    I have some experience in this area. For...

    I have some experience in this area. For example, I have developed systems with similar specs for extended deployments on the ocean floor.

    For a Teensy Data Acq board that would be suitable for...
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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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