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  1. With the PGA the "on paper" resolution is even...

    With the PGA the "on paper" resolution is even better than that, I've successfully used the teensy's internal adc and PGA to measure signals smaller than what the op is describing, (I was directly...
  2. I am not really an expert on this so others can...

    I am not really an expert on this so others can feel free to correct me if I go wrong, but I'll do my best, this is my take on it.

    You do not want to connect the signal- to the ADC REF EXT
    ...
  3. So you're just sensing if there is over or under...

    So you're just sensing if there is over or under some amount of force?

    Do you have any details about your load cell? Exciting with the 3.3 volt supply from the teensy? What sort of mv/v at how...
  4. Vincenet what are you using the load cell to do? ...

    Vincenet what are you using the load cell to do?

    "...only toggle inputs not for precise measurement...."

    This makes me think it's something like a weight sensor that is used to actuate...
  5. Vincenet I ended up doing some tweaking on the...

    Vincenet

    I ended up doing some tweaking on the version of my device that used an arduino compatible and an hx711 and found it to be satisfactory, so I never followed through with the teensy...
  6. I would do what Constantin is saying. Are you...

    I would do what Constantin is saying.

    Are you using software serial? Teensy has 3 hardware serial ports, unless you are already using them for something else why not use hardware serial.

    In...
  7. The folks who are replying should know that an...

    The folks who are replying should know that an openlog is this:

    https://www.sparkfun.com/products/9530

    It's basically an Arduino uno chip with uno programing but it is dedicated to reading...
  8. You need to post the complete code you're using...

    You need to post the complete code you're using and how you have everything connected for anybody to really help you.

    Also, I happen to be somewhat familiar with openlog, but most people on this...
  9. The suggestions are appreciated. I did...

    The suggestions are appreciated.

    I did experiment with an INA125 amplifier but it adds a lot of complexity, (relative to the simplicity of a bare teensy) and since it looks like I can get the...
  10. That is it at the moment, it is a pretty ugly...

    That is it at the moment, it is a pretty ugly result of a convoluted trial and error process and I plan on tidying it up quite a bit, but currently it's working as is to simply measure force on the...
  11. #include ADC *adc = new ADC(); void...

    #include <ADC.h>

    ADC *adc = new ADC();

    void setup() {
    // put your setup code here, to run once:
    Serial.begin(9600);
    //analogReadRes(16);
    //analogReadAveraging(32);
  12. I hear you, I'm aware that what I'm doing here is...

    I hear you, I'm aware that what I'm doing here is kind of "hackish", but my application is honestly not very demanding, simplicity is very high priority, so far it is looking like this is working.
    ...
  13. I seem to have answered number 1 myself. Set up...

    I seem to have answered number 1 myself. Set up the load cell and the teensy as described and it is working quite well. Haven't tried to do the voltage divider for measuring 3v3 yet but the PGA set...
  14. Simplest possible way to read load cell on teensy

    I need to read a load cell, trying to do it with the greatest simplicity possible for physically assembling things together.

    Load cell puts out 2mV/V at full scale, so if I excite it with the...
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    Does this mean I could use a teensy 2.0 (or...

    Does this mean I could use a teensy 2.0 (or teensy 2.0++) to log data to an SD card then access the SD card from a computer via usb?

    I was under the impression that was nearly impossible....
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    At what rate might this setup be able to record...

    At what rate might this setup be able to record continuously?
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    If there was something that functioned (as far as...

    If there was something that functioned (as far as the user could see) similiarly to openlog except using SPI rather than serial and the various advantages of Teensy over an Atmega 328 to allow much...
  18. I stand corrected. Searching old threads confirms...

    I stand corrected. Searching old threads confirms what you are saying.

    Learn something new every day!
  19. Aren't the digital pins still limited to the same...

    Aren't the digital pins still limited to the same absolute maximum as the analog only pins when they are used for an analog read?

    I was under the impression that whatever circuitry was used to...
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    [QUOTE=raflyer;80705]Yes, I want it to change...

    [QUOTE=raflyer;80705]Yes, I want it to change when the difference has been .02 or 2 after integer and trunc. You are correct that it moves for every 1 now. Not sure how to get to 2

    For the...
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    If your value was increasing, then changed...

    If your value was increasing, then changed direction and decreased, without ever having been steady in between, wouldn't this set both pin 7 and pin 8 LOW?

    Also, this would detect any change in...
  22. Like the one 20 posts back on this thread????

    Like the one 20 posts back on this thread????
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    Because I don't really understand how it works....

    Because I don't really understand how it works. :)

    I'll probably give it a try. If nothing else it can be a learning experience, but for the sake of understanding what's going on better, I'm...
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    I have two of those which I have used both with a...

    I have two of those which I have used both with a Teensy LC and a 3.1 with no extra circuitry in between and they worked fine.

    I did have to be a little bit careful with a delay after certain...
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    What happens if you have analogWriteFrequency()...

    What happens if you have analogWriteFrequency() set to a value lower than it's minimum value? I have an application where I need a PWM signal that is adjustable from 1-20Hz, I have it running using...
  26. This is so slick it makes me want to come up with...

    This is so slick it makes me want to come up with a project that uses all those pins just so I have an excuse to buy a handfull of these boards.
  27. I'm pretty sure he means "Debounce" library...

    I'm pretty sure he means "Debounce" library rather than "denounce" library.

    Just throwing it out there in case somebody new to this finds this thread and is googling "denounce" and coming up with...
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    Ah, now we've gotten somewhere. Download and...

    Ah, now we've gotten somewhere.

    Download and open with web browser.

    I had actually tried that already but I didn't unzip the file. For whatever reason it didn't work until I extracted the...
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    Github documentation

    This is probably a stupid question, but how do I view "HTML Documentation" on Github?

    For example, I'm trying to figure out how to log some data to an sd card, I'm digging through example sketches...
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