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  1. Replies
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    Thanks, Paul! This is perfect (and thanks for the...

    Thanks, Paul! This is perfect (and thanks for the warnings). Fortunately no deep sleep or messing with the USB port, and we have a watchdog running in the main loop to help keep things alive. Just...
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    uploading hex file via teensy loader

    Hi all,
    Trying to see if I'm missing something with the teensy loader. My goal is to be able to remote into a windows machine that has a teensy 4.0 attached and update its firmware. Unfortunately...
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    Never mind! Found the answer here:...

    Never mind! Found the answer here:
    https://forum.pjrc.com/threads/55400-External-power-and-USB
    Sorry for the noise!
    David
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    schottky diode on Vin pin

    Hi all,
    Quick question (again showing my lack of knowledge in many things electrical). I know related questions have been asked and answered many times, but I'm worried that I might be missing...
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    And if anyone has any pointers on post #2 in the...

    And if anyone has any pointers on post #2 in the thread, please let me know!
    Thanks again,
    David
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    Got it! Let me see what I can break :) Thanks...

    Got it! Let me see what I can break :)
    Thanks for the pointer!
    Cheers,
    David
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    Hi vjmuzik, Not completely. Can we also specify...

    Hi vjmuzik,
    Not completely. Can we also specify pins on the T4 (see my OP)? If it is, it's not covered on the page you linked (which I've read many times).
    Thanks,
    David
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    Hi again, OK, setting aside fastLED for now and...

    Hi again,
    OK, setting aside fastLED for now and just focusing on teensy4 and the octows2811 library. I need to limit the number of pins the octosw2811 library uses, so using the code provided in...
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    teensy4 + octows2811 + fastled

    Hi all,
    Before I jump too far down this rabbit hole, wanted to ask a question of those with the brains for this. I found how to get the teensy4 and fastLED library to play nicely. And I love the...
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    Perfect! That all makes a lot of sense. Thank...

    Perfect! That all makes a lot of sense.
    Thank you for your help with this!
    David
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    high voltage input ... maybe?

    Hi all,
    Feeling pretty noobish with this question. Clearly showing my lack of solid electronics education here :)

    Building a controller board for an arcade cabinet with teensy 3.2 as the brains....
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    That's a nice feature! if we don't need it for a...

    That's a nice feature! if we don't need it for a particular application, is there a way to turn it off?
    Thanks again,
    David
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    @tonton81: Thank you for putting together this...

    @tonton81: Thank you for putting together this library! I use a watchdog for most of my teensy 3.2 code, but that obviously didn't translate well for the teensy 4.x. This is a big help!!

    Quick...
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    Thank you for checking. I think I found my issue:...

    Thank you for checking. I think I found my issue: the watchdog library I'm using (Watchdog_t4.h) and serial5 RX use the same pin! Woohoo! Except now I need to figure out why the watchdog needs that...
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    Serial5 on teensy 4.0

    Hi all,
    Just a quick verification that the pins are correct on the card for Serial5 on the teensy 4.0 (pins 20 and 21 for TX and RX, respectively). I'm having some issues communication via Serial5...
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    Copy that! Thanks! David

    Copy that!
    Thanks!
    David
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    Sorry, I feel like I'm confusing myself. I don't...

    Sorry, I feel like I'm confusing myself. I don't need the teensy run as a USB host. I only need need the usb connection to upload new firmware from a laptop as needed/after the device is "in the...
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    Hi Paul, Thanks for your help with this. The...

    Hi Paul,
    Thanks for your help with this. The teensy will only be working in usb device mode for this application. Most of the communication to/from will be via RS485 and the fancy new network option...
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    Great. I've been looking at those, too. Just...

    Great. I've been looking at those, too. Just wanted to make sure the USB pins weren't broken out elsewhere on board and hiding from me :)
    Thanks,
    David
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    access to usb pins on teensy 4.1

    Hi all,
    Quick question/confirmation that the only access to the primary USB connection on the teensy 4.1, other than the USB micro connection, is via the 2 pads below (D+ & D-) below the USB micro...
  21. OK. Now that I know how to wire the current...

    OK. Now that I know how to wire the current sensor, the question above is easily answered. I saw VIN+ and VIN- in the docs and immediately associated VIN- with ground. Nope! Also switched to the...
  22. @KrisKasprzak: yes, parallel. @boxxofrobots:...

    @KrisKasprzak: yes, parallel.
    @boxxofrobots: well yes, that it is a problem, isn't it! That's a bit embarrassing.

    Let me fix my mistakes and come back. I'll also look into the ACS758.

    Thanks...
  23. multiple current sensors advice needed

    Hi all,
    Need some advice from people much smarter than me in the ways of the electricity.
    Quick overview: a Teensy 4.1 is at the center of a new prototype I'm working on, essentially a networked...
  24. thanks for your help. never considered rs485 for...

    thanks for your help. never considered rs485 for this. I built a quick circuit but only the first LED in the chain lights up, and flickers like crazy. I'll keep digging into this option, tho!
  25. amplifying/extending ws2812 digital signal?

    Hi all,
    Need some advice, and curious if it's even feasible. I'm working on a project with a t3.2 at the center, using the fastLED library to drive a bunch of ws2812 LED's. No issues controlling the...
  26. Perfect! Pulldown with a 1k resistor on each...

    Perfect! Pulldown with a 1k resistor on each channel did the trick. My PCB isn't as clean, but it's functional!
    Thank you all again for your guidance.
  27. Thank you all for help with this. I was afraid it...

    Thank you all for help with this. I was afraid it was a mechanical/electrical fix, but it sounds like my issue is addressable, which is great. I'll add some resistors later today and report back.
  28. prevent RGB led from lighting up on boot up

    Hi all,
    Need some circuitry advice. I'm using a PicoBuck LED driver to drive a 3W RGB led. PWM output via pins 21,22,& 23 on a T3.2. LED is powered by external 12V source with shared ground with the...
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    Thank you!

    Thank you!
  30. Replies
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    OctoWS2811 Adaptor dimensions

    Hi all,
    Making a quick carrier board that incorporates the OctoWS2811 Adaptor (https://www.pjrc.com/store/octo28_adaptor.html).
    Can anyone pass along the dimensions of the board? I can derive the...
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    Well if you want to all technical about it :) At...

    Well if you want to all technical about it :)
    At the time of posting I had logged in about 2 hours on Eagle. A little bit later and I see that adding this/creating a library for it looks to be...
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    eagle part for microSD

    Has anyone created an eagle part for Paul's microSD adapter? (https://www.pjrc.com/teensy/sd_adaptor.html).
    Thanks,
    David
  33. I see this on the Mac, too (10.9.5). Varies....

    I see this on the Mac, too (10.9.5). Varies. Sometimes instant, sometimes up to a minute. Switching USB ports often fixes it for a while. There have been times when I wasn't able to get a new sketch...
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    Hi all, Thanks for the input. Since I have some...

    Hi all,
    Thanks for the input. Since I have some overhead I think I'll use both the 2 or 3-byte header and 2 bytes for checksum. And yes, t3 = t3.x. While beta testing I've been merely passing ascii...
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    byte header for message packet

    Hi all,
    I need some advice...again :)
    I'm doing a bunch of data processing on a t3 and then passing that along to a CPU via bluetooth or USB. The packet is a fixed length (50 bytes), and consists...
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    parallel processing on a t3.1?

    I'm showing my ignorance here, but need to ask. In my main loop I have a lot of time-sensitive processing going on. It needs to do its thing (reading and processing a lot of incoming sensor data and...
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    Perfect. Thanks, Paul. Note you can also use...

    Perfect. Thanks, Paul.
    Note you can also use Go>>Go to folder... (from the finder) to access the file via the finder vs. terminal.

    Very happy there's a hex version of the sketch :)

    Cheers,...
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    OK, so the answer is yes:...

    OK, so the answer is yes:
    http://forum.pjrc.com/threads/25035-Teensyduino-as-a-stand-alone-loader-for-downloading-HEX-files-on-various-computers

    So the only question I have is how best to save...
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    save and upload HEX file on mac

    Question about HEX files.

    I have an update to a sketch (via arduino) that I need to pass along to a client, however I don't want the client to have access to the sketch.

    A little bit of...
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    Yeah, I noticed that, too (see page 1 of this...

    Yeah, I noticed that, too (see page 1 of this thread). Not sure why, but it did finally work after that.

    David
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    Hi Paul, Never gets above 2. Shall I email the...

    Hi Paul,
    Never gets above 2. Shall I email the sound files? They are short little snippets. Craps out after about 5 playbacks (but not consistent). Sometimes one mixer input will freeze followed by...
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    I know this is old (was on page 7 or this...

    I know this is old (was on page 7 or this thread), but I'm actually seeing the same problems with the latest & greatest. Seems to lock up the board after playing a sound sample several times. Not...
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    Ahh...you aren't using a teensy 3 at all (which...

    Ahh...you aren't using a teensy 3 at all (which is why most of the notes in this thread don't apply to your application). Probably should have mentioned that up front (since the title of the thread...
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    After making the changes above, yes I got it...

    After making the changes above, yes I got it working using the gateway & node sketches that came with the library. Not sure what you mean by "my only hope is the missing pinMode". If you make the...
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    On the t3 any pin could be an interrupt. In the...

    On the t3 any pin could be an interrupt. In the RF69 library it was hardcoded to interrupt 0, which in t3-land is pin 0, which I was using for serial1 communications. So I changed it to 2. And to...
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    OK. And if I want to use an external 5V power...

    OK. And if I want to use an external 5V power supply do I connect to the Vin pin on the T3 (still using the adapter board) (i.e. once programmed, there will be no USB connection)? My current set-up...
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    Hi Paul, Just double checking that the t3 is...

    Hi Paul,
    Just double checking that the t3 is capable of powering the wiz820io? For some reason in the back of my head I had that it drew more than 100mA (can't seem to find that number in the docs)....
  48. @bloodline: oh that's very much a possibility in...

    @bloodline: oh that's very much a possibility in my world :)
    It's just one of those puzzles that hits me every once in a while. Good suggestion to look at how it's handled via UDP (especially since...
  49. Thanks for the pointers. I should have made...

    Thanks for the pointers.

    I should have made the inquiry a bit more generic (rather than just LEDs!). wrt LEDs, yes I could eliminate 255 from the list of possible values, but I'm also getting...
  50. How best to parse / format incoming stream of data

    This question has been on my mind for...years? And now I'm finally sitting down to try to figure this out.

    Let's say I have an array of numbers coming in from a PC to a teensy. Each number is a...
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