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  1. Replies
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    CAT5 cable and RJ45

    Kris,
    Nice job on extending an interface that is designed to be chip to chip, to a product to product application, and a very electrically noisy one at that! So really I have a thank you for your...
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    1,557

    Thanks Paul, appreciate the update very much. Is...

    Thanks Paul, appreciate the update very much. Is it even possible to keep a list of emails here on the forum of people that need to be notified in case of discontinuation? If so please put me down...
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    Planned support for Teensy LC and 3.2?

    Hello Paul,
    Congrats on a(nother) successfully Kickstarter campaign. It's nice to see good guys win! I'm sure I can find use for the new products.

    I'm currently using your LC and 3.2 in a Lithium...
  4. Yeah that is a good one, and in that tutorial is...

    Yeah that is a good one, and in that tutorial is Levy's recommendation for Kalman Filter for Dummies, which is pretty good too!
    http://bilgin.esme.org/BitsAndBytes/KalmanFilterforDummies

    The most...
  5. As for the observation about most Kalman filters...

    As for the observation about most Kalman filters being specific, that is just what I am finding also. I'll go get the Prop Shield code and check it, but I'm just wondering if it was made for general...
  6. Employing Extended Kalman Filter for battery SOC meter

    Hello all,
    First of all, I'd like to thank all of the forum members, and especially Paul S. for all of the amazing ideas, code and work product that is available on this forum to the greater world,...
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    Quantity pricing for Teensy LC?

    Hello Paul and Robin:
    I thought about leaving you private emails, but I figured if I had the question, well others might also.

    So is there thought about giving quantity breaks on your LC board?...
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    Barney, Seriously, if dead time is your only...

    Barney,
    Seriously, if dead time is your only power MOSFET protection, your design is in trouble. Always provide real-time short circuit protection for your bridge switches.
    Note that Avago and...
  9. Replies
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    That should read => Set DEAD time. It's the...

    That should read => Set DEAD time.
    It's the time one MOSFET in the bridge turns on and then complimentary MOSFET turns off. If they both turn on, the input power source is shorted out, which should...
  10. Replies
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    YOu can buy optos from Digikey for around 25...

    YOu can buy optos from Digikey for around 25 cents a channel...
    http://www.digikey.com/product-detail/en/PS2501L-4-E3-A/PS2501L-4-E3-ACT-ND/3646233, I'd say that was keeping component price down!!
    ...
  11. Replies
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    Slow optocouplers are cheap, you can use the...

    Slow optocouplers are cheap, you can use the 12VDC to turn on the LED part of the coupler, and use the teensy board logic suppply for the bias supply on the output transistor.
    It's easy and cheap to...
  12. Oh yeah...one last bit of advice. Put in an LED...

    Oh yeah...one last bit of advice.
    Put in an LED in your design.
    You can blink it for debugging and to know if your circuit is alive.
    Also you can hook a scope to it for measuring timing on...
  13. There is a pretty good paper by Analog Devices at...

    There is a pretty good paper by Analog Devices at http://www.analog.com/library/analogdialogue/archives/43-09/edch%2012%20pc%20issues.pdf
    It's a bit dated, but good analog practices never go out of...
  14. The 431 would be an external reference, why do...

    The 431 would be an external reference, why do you feel you need that? You can certainly use the Vcc 3.3V that is available on the T3 board, unless it's too noisy or inaccurate for it.
    Have you...
  15. Paul: I think resolution handling is pretty...

    Paul:

    I think resolution handling is pretty simple and effective now, using the analogReadResolution() function. I really don't care if it's signed or integer, I can work with either if I know...
  16. I agree about the USB, there is no way you can...

    I agree about the USB, there is no way you can make sure the plastic does not flow into that connector. Also agree about conformal coating, but that is not enough for waterproofing, just enough for...
  17. "I have the T3 in a tube filled with epoxy" ...

    "I have the T3 in a tube filled with epoxy"

    What brand and part number Epoxy? The epoxy might not have the same temperature coefficient of expansion that the T3 has. And after a few days of...
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    Sign me up! Maybe we can flush out the native...

    Sign me up!
    Maybe we can flush out the native DSP capability of the T3,
    and have fun doing it.

    Tim
  19. I'm not sure on the netiquette of replying to...

    I'm not sure on the netiquette of replying to your own posts, but that's never stopped me before!
    So here is the circuit I ended up with:
    915

    I do realize we are all busy, and so I understand...
  20. Request for Teensy 3 analog comparator library functions

    Hello Paul:
    Let me start by saying I am excited about the product, I've been a Freescale person since they were Motorola and used the early 6800 series, and watched them do what I think was the...
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    I'm really needing the internal comparator (OK...

    I'm really needing the internal comparator (OK I'm cheap and don't want to buy another IC!), so I looked into this problem again.
    I've narrowed the problem down to one line in the code, the...
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    Hey Kian: I've had similar results with the...

    Hey Kian:
    I've had similar results with the following code.


    If the program is run, it works fine, will print to Serial Monitor, but does not config the comparator if the bool debugMode = false....
  23. Thanks Paul. Yes I have tried that on both of my...

    Thanks Paul.
    Yes I have tried that on both of my Win 7 machines (Pro and Home) with same intermitt results.

    Funny that now I have done a sequence
    of maybe 100 or more edit/compile/upload/debug...
  24. I figured that someone might be interested in the...

    I figured that someone might be interested in the answer...so here 'tis.
    Freescale has a pull down menu for the boards they support with the Kinetis chip (Teensy 3), and of course the T3 is not on...
  25. Another problem is that sometimes the board needs...

    Another problem is that sometimes the board needs to be powered down, currently being powered thru USB
    So unplugging and replugging the USB cable will result in the message "Serial port not found....
  26. Forgot the specific description you asked for....

    Forgot the specific description you asked for.
    The code usually uploads to the board ok. At least 95% of the time.
    The problem usually is that I cannot then see any debug output, which is the about...
  27. Sure I can. 1. Arduino is opened, and the...

    Sure I can.
    1. Arduino is opened, and the connection box on bottom right message is "Teensy 3.0 on (USB Port)"
    2. Upon pressing the "Upload" button, the sketch is compiled successfully (code below)...
  28. Replies
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    analog comparator on teensy3

    I need the comparator for AC zero crossing, but I do not need an interrupt. I already have an ADC interrupt happenning very often, so
    I can just poll the comparator output for tripping, or better...
  29. Can Codewarrior IDE be used for Teensy 3.0, or any other simulators for T3 and Win7??

    Can Codewarrior IDE be used for Teensy 3.0, or any other simulators for T3 and Win7??


    Hello:
    I'm finding the serial comm very intermittent on my Win 7 Pro platform, and I really want to use the...
  30. Jeese... I've got to say, I'd marry this forum if...

    Jeese... I've got to say, I'd marry this forum if I wasn't already married!!
    That was fast!! and...that is fast.
    Thanks for the quick and relevant answer.
    Now I'll code my solution and post what I...
  31. Thanks Pete: Using the single cycle MAC...

    Thanks Pete:
    Using the single cycle MAC instruction for 16 X 16 + 64 = 64, which will accumulate data very quickly, the 13 ENOB ADC will be
    just enough resolution for the job. The application is...
  32. Callable RMS routine, what!!

    Then again, if you just collect up the samples into an array, you could use the library to do all the work the easy way. :D
    ...
  33. Where can I find list of math functions avail to Teensy 3.0

    Hello,
    I am using Teensyduino 1.15 (and yep...new to Teensy) and am wondering what math functions are available
    when I include the math library for 3.0? I have not been able to find this answer...
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