Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: tetsuo

Page 1 of 3 1 2 3

Search: Search took 0.00 seconds.

  1. :D ALWP... I guess I deserve that for...

    :D ALWP... I guess I deserve that for inappropriate use of CAPS!
  2. :) Not too onerous at all, no. I have a pot...

    :) Not too onerous at all, no. I have a pot controlling gain, and a button toggling on/off, so it feels hacky to have to have the button override the gain reading from the pot. Not really a huge...
  3. One follow-up question... there doesn't appear to...

    One follow-up question... there doesn't appear to be an end() method for AudioSynthWaveForm to correspond to begin() What is the correct method of stopping the output? For now I'm just setting...
  4. Just so that this thread isn't a total waste of...

    Just so that this thread isn't a total waste of space, I'll attach the very basic example I used to scope what was coming out of A14 in case someone else has the same question and is just looking for...
  5. False alarm! I think I have what I need after...

    False alarm! I think I have what I need after playing around with the GUI audio tool. It just seemed like overkill for my very basic needs, but looking at...
  6. Seeking BASIC example for AudioSynthWaveform or similar driving Teensy 3.1 DAC pin

    I don't need recorded audio (SD card) or even fancy synths. My goal is just to have a reasonably clean output directly from the teensy to generate a tone (sine, square, sawtooth, or triangle) at line...
  7. Replies
    116
    Views
    109,182

    NodeMCU is really easy to work with. I'd never...

    NodeMCU is really easy to work with. I'd never touched LUA before, but it's very straightforward as long as you're comfortable w/ its use of closures (follows patterns very similar to javascript....
  8. Replies
    116
    Views
    109,182

    I just thought I'd chime in and mention that I'm...

    I just thought I'd chime in and mention that I'm using a couple of ESP8266's paried with Teensy 3.1's and have had excellent stability out of the NodeMCU firmware. Instead of using AT commands over...
  9. Perfect, thanks. The relay board is one of the...

    Perfect, thanks. The relay board is one of the popular opto-isolated boards on which the coil/optocoupler power can be provided externally. I did have to use a level shifter for the board's 5v logic,...
  10. Holding pins HIGH 24/7 - anything to worry about?

    Thread title pretty much sums it up. I'm controlling a relay board where 4 of the 8 channels will be kept HIGH 99% of the time or more. This project will run 24/7... does that cause extra wear and...
  11. I guess I don't really count the "beta" status of...

    I guess I don't really count the "beta" status of the linux builds against them... when beta 1.1.18 came out they promoted it over 1.1.15 GA as the preferred version for anyone on linux (or at least...
  12. The T3.1 has a somewhat high noise floor on the...

    The T3.1 has a somewhat high noise floor on the ADC. I don't doubt you could get 100kS/s out of a Teensy 3.1 though, if the noise isn't a huge concern.

    If you're considering inexpensive...
  13. Replies
    5
    Views
    1,854

    Got 'em today. What a fun little display! I have...

    Got 'em today. What a fun little display! I have two of them working on one T3.1 - all pins shared except DC and CS, of course. Two of these gives me 320x480 of pixel real-estate to work with for $16...
  14. Replies
    5
    Views
    1,854

    It does indeed - thanks!

    It does indeed - thanks!
  15. Replies
    5
    Views
    1,854

    Thanks Kurt. That matches what I calculated...

    Thanks Kurt. That matches what I calculated based on the board's dimensions that are on that page. Really only 2.1-2.4 could fit within those dimensions, so I guess that's close enough :)
  16. Replies
    5
    Views
    1,854

    PJRC store 320x240 LCD specs?

    The product page is... erm... sparse :D http://www.pjrc.com/store/display_ili9341.html

    What size is it?

    Does it support touch? If no, is there a compatible resistive touch overlay?
  17. Replies
    6
    Views
    3,066

    I didn't get much from the attached code fragment...

    I didn't get much from the attached code fragment and have done little w/ HID stuff on Teensy, but out of curiosity, how confident are you that the timeout-handling code does what it should? Perhaps...
  18. Replies
    6
    Views
    2,360

    I'll just leave this here......

    I'll just leave this here...
    http://xkcd.com/378/

    C-x C-c
  19. Replies
    7
    Views
    5,629

    Perhaps... but I'd imagine you'd still be quite...

    Perhaps... but I'd imagine you'd still be quite limited in terms of amount of traffic, concurrency, etc. And what would the cost be? Higher end ethernet solutions that work w/ microcontrollers end up...
  20. Replies
    7
    Views
    5,629

    As others here and on stackexchange already...

    As others here and on stackexchange already covered, letting the linux side of the Yun handle SSL makes much more sense. When I need solid network performance (especially if there will be any...
  21. I just wanted to weigh in and say that I've got 8...

    I just wanted to weigh in and say that I've got 8 of the OSH Teensy 3.1's and have had no problems whatsoever with the USB ports... the tightness and robustness of the USB ports don't seem to be...
  22. Replies
    15
    Views
    13,868

    This material has great diffusion properties for...

    This material has great diffusion properties for its thickness. The thinner of the two is obviously more flexible, but will provide less diffusion:...
  23. Thanks for the heads-up, Paul! I ordered two :) ...

    Thanks for the heads-up, Paul! I ordered two :) Purple FTW!
  24. Replies
    10
    Views
    4,318

    On a different (but more on-topic) note, here's a...

    On a different (but more on-topic) note, here's a trick to make the WS28xx LED's work a LOT better for POV. Use a good diffuser! In my limited experimentation w/ POV on these modules, I was floored...
  25. Replies
    10
    Views
    4,318

    You most certainly CAN by leveraging the PRUs (as...

    You most certainly CAN by leveraging the PRUs (as w/ LEDscape). I'm currently using a slightly hacked-up version of Yona Appletree's fork of LEDscape in my largest (5200 LED) project, but I've stuck...
  26. Replies
    19
    Views
    9,202

    Lookin' very nice! Yes, definitely put the colon...

    Lookin' very nice! Yes, definitely put the colon mapping elsewhere, as they don't really correspond to segments, digit positions, or numeric values, all of which drive the structure of the map.
  27. Replies
    32
    Views
    10,462

    +5V to pins 1 and 20 GND to pins 10 and 19 On...

    +5V to pins 1 and 20
    GND to pins 10 and 19

    On the OctoWS2811 library page, Paul was kind enough to annotate a diagram of the 74HCT245 to indicate where you'll need +5 and GND. It's wired up as a...
  28. Replies
    32
    Views
    10,462

    pin 19 is OE, not VCC. You may be getting +5V on...

    pin 19 is OE, not VCC. You may be getting +5V on the output pins at the moment, but I can assure you that w/o +5V on the DIR pin, you're not going to get anything but noise.
  29. Replies
    19
    Views
    9,202

    Not sure what you mean by array indices starting...

    Not sure what you mean by array indices starting at 1 instead of 0... that's certainly not the case. It's just C/C++ w/ a small amount of "convenience" built into the arduino IDE, but you're correct...
  30. Replies
    19
    Views
    9,202

    So sorry... I was way too hasty. If you tried the...

    So sorry... I was way too hasty. If you tried the first version I posted, it had some silly mistakes. They jumped out when I tabbed back over. Make sure if you're playing w/ that code that that you...
  31. Replies
    19
    Views
    9,202

    Here you go. This ~should~ be a single-digit...

    Here you go. This ~should~ be a single-digit version of what I was trying to describe that is based off of your code (and what I believe to be your pixel mappings). There may be parse errors......
  32. Replies
    19
    Views
    9,202

    Actually, what you've implemented is not what I...

    Actually, what you've implemented is not what I was suggesting. The idea was to abstract the idea of 7 segments away from specific LED indexes. What you've done is combine them in a 3-dimensional...
  33. Replies
    32
    Views
    10,462

    You're missing +5V on the DIR pin of the HCT245...

    You're missing +5V on the DIR pin of the HCT245 (pin 1). It's also good to ground the GND pin even though you've technically grounded it on the other side @ the OE pin.
  34. Replies
    32
    Views
    10,462

    Would the series resistor really do much as its...

    Would the series resistor really do much as its placed at the moment? (e.g. it's not in series unless that breadboard is something special)
  35. Replies
    1
    Views
    1,377

    Sources for adhesive+screw PCB standoffs?

    I'm looking for a bit more variety of products like this:
    http://www.balticnetworks.com/super-adhesive-abs-plastic-pcb-stand-offs-4-pack.html?gclid=CNCFk5zEnLwCFacDOgodHXIAsQ

    I can't seem to...
  36. Wow... I'm glad you got it sorted out, but I have...

    Wow... I'm glad you got it sorted out, but I have no clue as to what collision may have occurred between those two header files (that wouldn't have caused compilation errors).

    In any case, with...
  37. Replies
    0
    Views
    1,401

    HDMI and teensy?

    I've started looking into building an HDMI lag tester similar to this:
    http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=89&products_id=212

    My initial plan was to build it out...
  38. One last thing! In addition to needing a 100 Ohm...

    One last thing! In addition to needing a 100 Ohm resistor near the transceiver, you probably need one where you're transitioning from CAT5 to whatever stranded copper you're using for the last 12+...
  39. Ahh - wait, I see. You're running power to the...

    Ahh - wait, I see. You're running power to the connector for the strip, and then FROM that connector back to the teensy? I'm not sure what the pros/cons of such a layout would be, but it's certainly...
  40. I'm not sure I follow correctly - are you using...

    I'm not sure I follow correctly - are you using CAT5 to carry power to the strip? I can't see how you're getting 4.9V at the strip if that's the case (maybe at low brightness levels, but I'd expect...
  41. One other test tip if you're playing w/ a scope...

    One other test tip if you're playing w/ a scope or an analyzer. In addition to testing at full #FFFFFF, try #AAAAAA and #555555 as your test colors - they're a perfect 0101010 cadence so any bit...
  42. Darn :( I wish I had some other suggestions for...

    Darn :( I wish I had some other suggestions for you. I think you're onto something re: your findings with the scope and signal quality. If I just run the teensy w/o any LEDs connected, the signal...
  43. Replies
    18
    Views
    14,005

    That auction sold out, but it appears they list...

    That auction sold out, but it appears they list them regularly. I'm almost positive they're sourcing from the same manufacturer as AWC:
    http://www.awcwire.com/part.aspx?partname=e30-1...
  44. Replies
    3
    Views
    1,248

    The timing doesn't precisely match the spec...

    The timing doesn't precisely match the spec sheet, but it does match the general behavior of these LEDs. The 0 bit needs to be at least 280ns, and the 1 bit at 750ns. What's surprising is how small...
  45. Replies
    18
    Views
    14,005

    Sorry to dig up an old thread, but how does the...

    Sorry to dig up an old thread, but how does the cheap eBay PTFE-insulated stuff compare? $15 for 100' is much easier to swallow... is the Alpha wire that much better?
    ...
  46. I doubt it's anythign wrong w/ the code. Nothing...

    I doubt it's anythign wrong w/ the code. Nothing jumps out, and your symptoms sound like common behavior for WS281x LEDs (they're actually picky little buggers compared to the old WS2801's)

    Is the...
  47. Replies
    19
    Views
    9,202

    I built a 7-segment digital clock and implemented...

    I built a 7-segment digital clock and implemented it much as mortonkopf describes. Each segment is illuminated by two LEDs, and I built a few arrays to make leveraging those LEDs simpler. I numbered...
  48. Not XSS, but relevant :) 1295

    Not XSS, but relevant :)
    1295
  49. Replies
    17
    Views
    9,415

    Actually, no. I have 6 MeanWell SP-320-5 ~300W...

    Actually, no. I have 6 MeanWell SP-320-5 ~300W PSUs. I just did testing w/ a single PSU and pair of strips so I could see if my max cable length (plus a few feet) was going to work OK. I was having...
  50. Replies
    25
    Views
    12,314

    Hard to be sure w/o some details of how things...

    Hard to be sure w/o some details of how things are wired up (e.g. how are they powered, whats tied back to GND, etc), but I'd wager that its grounding issue or that you forgot to connect pins 15&16...
Results 1 to 50 of 119
Page 1 of 3 1 2 3