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  1. Thanks! These are from alibaba and dont have...

    Thanks! These are from alibaba and dont have any info unfortunately. Ill give it a shot with the mcp and see how they do
  2. Advice on Charging a 3.6 Volt Lion Coin Cell

    Hi guys, Im trying to determine the best IC to use for charging a small 3.6V ~30 mAh lion coin battery. Ive found mixed opinions regarding wether or not you can charge a 3.6V battery in chargers...
  3. Can I power a Teensy 3.2 With 4 AAs?

    I know the official max Vin is 6V and that although the regulator chip can handle up to 10V, it isnt recommended due to thermal dissipation. But in practice, would I risk killing my T3.2 with 4...
  4. Audio Library Causing Phantom Packets With NRF24l01+

    Hey guys,

    I'm trying to troubleshoot a build that uses a Teensy3.2+AudioShield+nrf24l01 radio module. This unit receives simple 2 byte packets from another T3.2 and uses them to select a drum...
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    okay thanks!

    okay thanks!
  6. Replies
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    wav2trw isn't working for me: 'Not a Valid Win32 Application"

    When I run wav2trw.exe on Windows XP I'm getting an error saying it's not a valid Win32 application. I also tried running it on a Windows 10 machine and it says it 'can't run on my PC'.

    Meanwhile...
  7. Okay problem solved: The code I included in my...

    Okay problem solved: The code I included in my second post works fine but I was using 85% of dynamic memory and at runtime my string variable was getting scrambled to where it was blank if I tried...
  8. Hey thanks for the help! Unfortunately it still...

    Hey thanks for the help! Unfortunately it still isn't working... based on what I've read about c_str() this should be correct, no?



    String filename = "K014.RAW";...
  9. How to pass a String variable into AudioPlaySerialflashRaw::play() ??

    Hey guys,

    Maybe a silly question but I can't figure out how to assign a filename to a String, say "KICK014.RAW" for example, and then pass that String into AudioPlaySerialflashRaw :: play(const...
  10. Changing analogWriteFrequency Breaks nrf24l01+ Wireless

    Hey guys,

    This has been bugging me, I have an nrf24l01+ radio on a teensy 3.2 that runs a motor thru a tip120. The motor is speedy and responsive if I change analogWriteFrequency to something...
  11. Thanks for the responses guys! I figured out the...

    Thanks for the responses guys! I figured out the problem, it was silly. I had this malformed comment line at the very top of the page before the include statements :

    ***//dont forget to open the...
  12. DMAchannel.h won't compile in newer version of Arduino

    Hey all, I'm trying to run copyFromSD and I'm getting an error from DMAchannel.h:


    C:\Program Files\Arduino\hardware\teensy\avr\cores\teensy3/DMAChannel.h:46:1: error: expected unqualified-id...
  13. I've mounted another W25Q on a different audio...

    I've mounted another W25Q on a different audio board and same problem...The test returns negative results, the same ones you get if there's no memory chip there at all. The only difference I can...
  14. Hey I did that originally, it didn't do anything...

    Hey I did that originally, it didn't do anything because it detected that there wasn't anything at all on the chip:

    Flash Memory has 0 bytes.
    Erasing ALL Flash Memory:
    estimated wait: 0...
  15. W25Q128FV SPI Memory Chip Discontinued, Should This 'Direct Replacement' Work Fine?

    I went to buy a W25Q128FV as prescribed for the Audio Shield and found that it's no longer available. DigiKey says this is a direct replacement:
    ...
  16. Hey so I had about 18 inch leads coming off the...

    Hey so I had about 18 inch leads coming off the mic because of how it was situated in my device, and I tried just jamming the 2 legs of the mic straight into the GND and MIC inputs, and that seemed...
  17. Hey it's just a pretty basic mini electret: ...

    Hey it's just a pretty basic mini electret:
    ...
  18. My mic input into the audio shield is super distorted/hot

    Hey guys,

    Im using the audio shield and am getting major distortion/crazy high gain with electret mic audio entering via the AUDIO_INPUT_MIC
    input.
    Basically the mic signal is super hot,...
  19. Connecting a usb game controller to a teensy 3.2

    Hey guys,

    I want to connect a usb video-game controller to a teensy 3.2 in order to launch audio samples and control lights. My plan is to simply wire a female usb jack onto the 4 underside pads...
  20. Hey Paul, tested everything and it works fine,...

    Hey Paul, tested everything and it works fine, even analogRead, so no harm done I guess, thanks for the help man
  21. Knocked an SMD component off a T3.1, can I still use it?

    Hey guys,

    I got too rowdy and knocked off one of the SMD components from a Teensy 3.1 (circled in yellow):

    7591

    I took a moment to try and locate it in the schematic but then figured I may...
  22. Hey Paul, I edited the main question to...

    Hey Paul,

    I edited the main question to make it as clear as I possibly can. Sorry it turned into a confusing report; my half-baked attempts to fix
    the problem are probably pretty irrelevant...
  23. Hey Paul, I threw together a video (in the...

    Hey Paul, I threw together a video (in the original post) that I hope gives a good demonstration of my chief problem: that I can't get sufficient FM modulation on Teensy. It shows the maximum amount...
  24. Okay I added a test sketch to the main post and...

    Okay I added a test sketch to the main post and am getting some demo footage together, I'll probably post it some time before midnight
  25. mxxx- I just commented out lines in mixer.h and...

    mxxx- I just commented out lines in mixer.h and sine.h that clamp the max gain, ie ' if (n > 1) n=1 '. Like I said, it didn't have spectacular results so I'll check out the other things you...
  26. Teensy FM Synthesis Problems, not enough modulation

    Hey gang,

    I've been trying to implement some algorithms from yamaha's DX7 on Teensy 3.1 using its sineModulated object but have had difficulty getting
    the correct results. After a lot of...
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    Solved it

    Well, I solved the problem for my current device by just removing the line "radio.openReadingPipe()" from setup(). Simple enough. I hadn't really tried running the full system without that line...
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    Teensy LC + nrf24l01 = BRICK

    Hey all,

    I've got an nrf24l01 wireless sketch running smoothly between two T3.1's. I'd like to change the transmitter to a Teensy LC, but have found that simply dropping the new board into the...
  29. Slide Potentiometers with Contacts on Handle

    Hey guys,

    Does anybody have any knowledge of slide potentiometers that have integrated contacts on the handle of the wiper, allowing a little circuit to be attached to the handle and powered...
  30. Yeah that looks legit, and for lcds, just search...

    Yeah that looks legit, and for lcds, just search ebay for HD44780 and you'll find tons of other people selling em like this one:...
  31. Teensy 3.1 is a great board for MIDI stuff, I'd...

    Teensy 3.1 is a great board for MIDI stuff, I'd check out

    this: https://www.pjrc.com/teensy/td_libs_MIDI.html

    and this: https://ccrma.stanford.edu/~craig/articles/linuxmidi/misc/essenmidi.html...
  32. Thanks for the detailed info! I had put the...

    Thanks for the detailed info! I had put the antenna extension on there because once I first sealed up the board in its thin plastic box, the wireless was completely belligerent from pretty much any...
  33. SWEEET! thanks for the help man, boosted my range...

    SWEEET! thanks for the help man, boosted my range up to a solid 50 feet by using setDataRate(RF24_250KBPS) and setting the payload size to 6 (it had been 8). In some extra payload tests I got much...
  34. Improving range between two nrf24l01+?

    I've seen a bunch of people have been using the nrf24l01+ to get ranges of 10 meters (or more) and am vaguely perplexed cause in my tests I haven't gotten anything remotely reliable over about 16...
  35. Problem Fixed

    For posterity's sake, I should mention that I solved this god-forsaken problem yesterday...it did turn out to be an array writing out-of-bounds, but not one related to my wireless code. It was an...
  36. Cripes...that was another typo, I edited the post...

    Cripes...that was another typo, I edited the post again, sorry about that, I'm surprised you noticed that though! I gotta remember i before e except after c.
  37. Hey Cosford, sorry, I butchered that declaration...

    Hey Cosford, sorry, I butchered that declaration in posting it here, it's a byte array; I edited the post so it's straight now. Anyway I was trying to replace this line that reads the ping back...
  38. Frank, I think you could right about being out of...

    Frank, I think you could right about being out of bounds with an array...I'd been sending 8-rowed byte arrays, and now having switched to sending individual bytes the problem seems (tentatively) to...
  39. thanks Frank, it's a Teensy 3.1... I'll try...

    thanks Frank, it's a Teensy 3.1... I'll try reducing some variables and let you know what happens...I don't feel like they're exceptionally excessive, although I do have 23 timers going, which is a...
  40. Better Description

    Hey guys, here is what I hope will be a clearer demonstration of the problem I'm having:

    (these variables appear nowhere else except this declaration and the main loop chunk below)

    boolean...
  41. defragster, I'm not overtly using any interrupts...

    defragster, I'm not overtly using any interrupts in my sketch; the audio from the mics is just being casually sampled at whatever speed the loop runs at since it doesn't end up being audible anyway. ...
  42. Ah that's a good point about the compiler...

    Ah that's a good point about the compiler whollender, I guess some of those examples make more sense in light of that...well at any rate if I remove the "&& !binaryFlicker" wireless does actually...
  43. Hm.. that's a good thought. I removed the Serial...

    Hm.. that's a good thought. I removed the Serial prints and Serial writes but unfortunately it's still not right...I've done some more tests and am even more perplexed. Here are three examples:
    ...
  44. Incomprehensible Software Issue With An NRF24L01 Set-Up

    Hey yall, I've got a real nut-blaster of a problem going on over here with the nrf24, and figure maybe someone in here can help me regain some sanity. I've got a wireless midi controller that has...
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    Every Pin on Circuit Reading High

    Hey all,

    I am having an issue with every analog and digital pin being buried at 1023 (T3.1); the inputs are a variety of knobs, piezos, and buttons. This is on a protoboarded circuit that...
  46. great link, thanks...I'm checking some of these...

    great link, thanks...I'm checking some of these out.
  47. Basic comparison of some wireless options with Teensy: HC-05, XBee, and nrf24l01+ ?

    Hey guys,

    I'm making a wireless MIDI controller involving two Teensy 3.1's, with one sending instructions to the other which then outputs midi via a standard cable to a computer, keyboard, etc....
  48. Ahh much better, thanks man! I've got it running...

    Ahh much better, thanks man! I've got it running nicely at PWM frequency of 187500
  49. Motor emitting 490 Hz tone at lower analogWrite values

    Hey guys,

    I've posting many tech support questions recently but I think this'll be the last of em for a while so thanks for putting up with me! I've got an HC385MG DC motor I pulled out of a...
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    Hey Paul that LED on pin 1 and 2 is a great tip,...

    Hey Paul that LED on pin 1 and 2 is a great tip, I wouldn't have thought of that. Anyway, I solved it, and it WAS something simple: I had pin 4 and 5 reversed. The MIDI.org schematic and the...
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