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  1. Thanks UhClem! That totally works as a response....

    Thanks UhClem! That totally works as a response. As it stands I think I interpret your response as a more generic tip for two options, and the more global statement that there are a lot of options...
  2. Mosfet gate driver recommendations for Teensy 3.X lines? Overview gen question

    Hey, so I'm noticing on a number of my regular projects the only downside to switching to the 3.X teensies has been the 9mA/25mA MAX 3v3 drive potential of the pins. This compares to the 5V 20mA/40mA...
  3. Hard for me to say what is right or wrong. hx711...

    Hard for me to say what is right or wrong. hx711 library relies on Arduino being slow enough. That seems to be the library fault. On the other hand, users like me are *hard* stuck in a situation like...
  4. :O, cool. :) Is there anything I can do to...

    :O, cool. :)

    Is there anything I can do to ensure due diligence about the bug? Meaning, making sure the change is a necessary change. The only thing I could think of today was what I last posted,...
  5. UPDATE: Original HX711 library code does not...

    UPDATE:

    Original HX711 library code does not work compiled at 120Mhz or 24Mhz on the Teensy.

    Frank B, your code works though! Compiled at 120Mhz or 24Mhz. :)!

    I am a little confused why...
  6. Hey! I am back to getting good values. I have...

    Hey!

    I am back to getting good values. I have some things to look into. There was a damaged wire that may have made Vdd disconnected for moments. A5 and A4 pins seem dead now (my DOUT and SCK.)
    ...
  7. This looks great! I tried it, and messed around...

    This looks great! I tried it, and messed around with a few values.

    I'm going to look into my hardware now more intensely. I'm sorry I thought I had the hardware side fully in control but I'm now...
  8. Slowing down to 24MHz with the original HX711...

    Slowing down to 24MHz with the original HX711 library doesn't work (same bad values.)

    I am flustered that this morning I couldn't get the code last night to replicate "good" results. So my "fix"...
  9. ShiftIn appears to be a wiring_c function,...

    ShiftIn appears to be a wiring_c function,
    https://forum.arduino.cc/index.php?topic=391376.0

    In case this gives people clues (if Teensy uses a different wire library, or something like that,...
  10. Conflict with Teensy 3.X and HX711 Libary, I think related to ShiftIn function

    Hello, I've been on an epic saga today learning about things I wish I didn't have to understand ;), and for the most part don't have to due to the grace and glory of those who make libraries and make...
  11. Hi Kurt! Ultimately I think you are correct, I...

    Hi Kurt!

    Ultimately I think you are correct, I should do things that way. One reason I changed to automatic-mode however is because it is actually a faster method internally, the one-shot reading...
  12. Clarification on using SPI within interrupts on the teensy 3.X series

    I have been trying to get to the bottom of using SPI during an interrupt with the teensy 3.X series. Documentation here suggests I need to configure the SPI library to be compatible with being used...
  13. Thanks! That makes sense, and is quite practical....

    Thanks! That makes sense, and is quite practical. Very much appreciate having such an answer, and feel better knowing it is working as it should/was intended, and not just by a lucky quirk of my...
  14. https://playground.arduino.cc/Code/PIDLibraryAdvan...

    https://playground.arduino.cc/Code/PIDLibraryAdvancedMethods
    I just found this, and learned the compute only runs every 1 second, even if I call it more frequently. So in reality, I think that is...
  15. Brief clarification on pwm frequency behavior for slow PWM frequency and PID

    Hi all, [using teensy 3.5 here]

    I'm looking for input/advice about the behavior of analogwrite when I have used teensy's analogwriteFrequency() function set to a particularly low frequency. ...
  16. Hi Kevin! Thanks for the tip and I'll keep it...

    Hi Kevin!

    Thanks for the tip and I'll keep it in mind next time I'm working on a similar project. It's not what comes to mind, in part because I'm a mechanical engineer masquerading in EE shoes. I...
  17. Thanks Paul :)! Good to hear from you, since...

    Thanks Paul :)! Good to hear from you, since you've probably seen most of what has been done and shared as such.

    I'm going to give it a shot, though it might take a few months, it seems, to...
  18. Update 1(my project): So I finally wired up...

    Update 1(my project):

    So I finally wired up everything, so I have my teensy3.1+audio board connected to an autogain adjusting microphone from adafruit (to line-in, since its an auto-adjusting mic...
  19. "Bug" report (cannot access pde.jar during teensyduino installation) SOLVED [report]

    Hello!

    I had a hell of a time installing the latest teensyduino. I finally upgraded because I need to use the audio libraries and realized it would be the easiest way for me to get them all...
  20. So I will update mid january, since I will be...

    So I will update mid january, since I will be doing most of my work on this over december, but I just wanted to clarify the audio-reactive bit.

    I think you interpreted audio-reactive to literally...
  21. This seems like the most likely project I could...

    This seems like the most likely project I could learn something from:
    https://learn.adafruit.com/fft-fun-with-fourier-transforms/spectrum-analyzer

    I am just starting to understand it, but if...
  22. Audio Reactive Teensy - any open source code or guidance?

    Hi,

    Obviously there is some amazing software out there for the common individually addressable RGB leds, and also for FFT analysis of music input.


    I've found a lot of projects that...
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    Will you be staying overnight at a hotel...

    Will you be staying overnight at a hotel anywhere? consider phoning ahead and asking if you can ship to there if you are booking particular rest-days.

    Alternatively I suggest being a little more...
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    Think about your current interests and hobbies,...

    Think about your current interests and hobbies, and what you might be able to do to "improve" them with a microcontroller. Keep it simple, for sure. You will find your first project is way more...
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    I'm not 100% clear on what happened with your...

    I'm not 100% clear on what happened with your situation, but it sounds like you didn't properly cut the traces. If you cut the traces correctly, it will not power on with usb power. You may have...
  26. Teensy 3.1 recognition problem Windows 8 (not solved by common troubleshooting tips)

    Hi!

    EDIT SOLVED, See text at bottom

    I'm hoping for some help with a little problem. I can't seem to get two teensy 3.1s running. I actually have another 2 that run without a problem.

    They...
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    ok, good luck. Sorry about my input, I was...

    ok, good luck. Sorry about my input, I was completely off-base to not realize it was teensy 2.0. Yes, I was referring to teensy 3.1
  28. Ah, thanks. So i guess part of my confusion...

    Ah, thanks.

    So i guess part of my confusion is because the conclusion is that one could power the teensy with 3v3 to Vin or with 3v3 to the 3.3v pin, either works. The difference is that the Vin...
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    Some of the analog pins already are not connect...

    Some of the analog pins already are not connect to the digital input buffers. A10 and A11 I know to be one pair, but there are more. These are NOT 5V TOLERANT to be a friendly reminder. They are just...
  30. Thread: Very hot teensy

    by Tomek
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    Somehow selectively damaged the LDO? And it fused...

    Somehow selectively damaged the LDO? And it fused open? This could explain why Vin would not work but 3V3 pins would.

    but your (somewhat unclear, sorry) description seems to suggest that Vin...
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    How big is your board? Are you hand-soldering or...

    How big is your board? Are you hand-soldering or SMD assembling the rest of the components?

    The teensy is very compact and well laid out. I find it hard to believe for 100 units you can save money...
  32. I apologize for resurrecting this thread, but I'm...

    I apologize for resurrecting this thread, but I'm still not entirely sure what the situation is.

    When I connect 3.25v regulated to Vin on the teensy, I see ~2.95V on the 3V3 pins. This makes sense...
  33. Damn, i somehow didn't connect the regulators [i...

    Damn, i somehow didn't connect the regulators [i have a 3v3 and 5v one] to Gnd! They are floating on a different circuit.

    Interesting behavior on the regulators (maybe entirely expected but it's...
  34. Geez! OK, weird. I guess sometimes these things...

    Geez! OK, weird. I guess sometimes these things really do well. Probably in half an hour I'll find my teensy dead, 50% because I was pushing it past the limits, and 50% because I posted asking about...
  35. Teensy 3.1 Abs voltage max? Somehow mine is surviving 6.76V

    I've checked with two meters, and somehow my teensy is tolerating 6.76V across Vin and Vgnd, with the V-usb trace line cut.

    I thought the teensy 3.1 had an maxinum of 5.5V on the input?



    I...
  36. Thanks Jp! The LED peak current vs DC rating was...

    Thanks Jp! The LED peak current vs DC rating was a good illustrated analogy. I appreciate the practical advice, as I don't have much experience. I am definitively not needing the real production...
  37. I'm possibly nitpicking, but I'm actually...

    I'm possibly nitpicking, but I'm actually concerned that the SSR might not be OK with the theoretical peak current. Can you explain why they would be?

    According to this calculator with a R of 5...
  38. I was going to go with an affordable OMRON SSR...

    I was going to go with an affordable OMRON SSR switch with 25Ohm on resistance:http://www.farnell.com/datasheets/1319812.pdf
    But the datasheet I could find only specified continuous current (70mA.) ...
  39. Thanks JP, and I think going through the specific...

    Thanks JP, and I think going through the specific parameters you pointed out to me was helpful for me to get an understanding of the individual parameters. That is, when I was looking at everything...
  40. If anyone else finds my thread for their...

    If anyone else finds my thread for their applications, I am listing a few application notes I found while trying to figure out my situation:
    TI AN-20 An Applications Guide for Op Amps
    TI...
  41. Hi JP again! (or anyone else reading.) So I've...

    Hi JP again! (or anyone else reading.)

    So I've read a bit more, and went off base for a while trying to determine if I want an in-amp or op-amp. The in-amps sound cooler (well of course! they are...
  42. I also am looking at what I did before and...

    I also am looking at what I did before and increasingly confident that i messed up my current board by not connecting the one leg of the capacitor to anything when i tried to measure the other leg.
  43. Thanks jp3141! I think I was getting...

    Thanks jp3141!

    I think I was getting overwhelmed with the info on opamps (they have alot of what seem to me subtle parameters). I'll look at the two you suggested and individually read up on each...
  44. Q: I think i bungled flying capacitor implementation. Advice? Schematic attached

    So a few months back I made a PCB board for testing some higher voltages with my teensy. (9 voltages from +/- 0-36V in ~4v increments with a voltage divider for the final 4v output into a teensy...
  45. Does the one that get hot communicate ok via...

    Does the one that get hot communicate ok via serial monitor? Try testing that.

    You probably either have
    (1) A completely burnt out teensy.

    or
    (2) A teensy with only a pin or something burn...
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    If you want to do this, it would be a great idea...

    If you want to do this, it would be a great idea to use a 3.3V switching regulator for the TFT, and the teensy, though the teensy doesn't matter as much. The 3.3V regulator could supply more current...
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    definitively valid criticisms! And, i have little...

    definitively valid criticisms! And, i have little experience with low power sleeping (err I don't associate steppers with low power systems).

    My experience with acellstepper involves a first look...
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    Not sure exactly what sineX is. But it looks like...

    Not sure exactly what sineX is. But it looks like maybe that part of a library?

    For multiple stepper motors and the acelstepper library i use something like this for multiple instances
    ...
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    If you are looking for a generic interrupt...

    If you are looking for a generic interrupt stepper motor controller without reinventing the wheel, consider looking at 3D printing code like Marlin. I believe they use interrupt for the steps.
    ...
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    *silicon tolerances.

    *silicon tolerances.
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