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  1. IO Errors with latest Platform IO and Teensy LC

    Hi guys, I've been developing on the Teensy LC using Platform IO and VSCode for some time now, but the latest version is having some strange issues which I can't seem to figure out. Basically, the...
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    Connecting ground via 24awg wire

    Hi guys, I'm planning on separating my current pcb into modules; the teensy circuitry would be on its own board, which would connect to a board with buttons and leds via a 4 pin jst connector. Will I...
  3. Thanks for the heads up I'll check there! Nothing...

    Thanks for the heads up I'll check there! Nothing super crazy on this board. Pretty basic stuff...LEDs, memory chip, microcontroller, bout it.
  4. Custom Teensy Board, Manufacturing Defects

    Hi guys; I've gone through the process of designing a custom Teensy board for a low volume product (200 units) and have sold almost all of the units I've produced. The boards integrate a Teensy LC...
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    Looks like it was a combination of a dead LED and...

    Looks like it was a combination of a dead LED and a cold solder...Chinese pcb manufacturing has had about 8% margin of error now...
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    Ws2812b + 74hct245 random failure

    Hi guys. I am trying to diagnose a very strange issue and could use some help. I have 12 WS2812b LEDs hooked up to a 74hct245 chip being driven by a teensy lc. The LEDs have been working fine for...
  7. I get that, I am just unsure how to read/write to...

    I get that, I am just unsure how to read/write to specific pages.

    Would this snipped write to block 1 on page 2 or is there some other bit message I need to send to switch the page i'm...
  8. Ok...I managed to kind of get it working, but...

    Ok...I managed to kind of get it working, but still have a thorough lack of understanding of what's really going on. I see in the datasheet that there's a required word address before write/read...
  9. Garbled Data from I2C EEPROM using i2c_t3 with Teensy LC

    I'm stumped. I have this EEPROM device (https://datasheet.lcsc.com/szlcsc/Shanghai-Belling-BL24C04A-NTRC_C177778.pdf) hooked up to the SCL/SDA pins (18 & 19) on a Teensy LC using 4.7k external pullup...
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    Teensy LC EEPROM Write Speed

    Hi, I'm running into a strange issue where I write to pretty much all the available EEPROM memory on the Teensy LC, but sometimes when I retrieve, it's pulling previously written values, indicating...
  11. Hey Paul, I'm waiting for a new soldering iron...

    Hey Paul, I'm waiting for a new soldering iron tip and haven't had a chance to hack the board yet. I did, however move things around a little bit for the next revision board. I moved one of the .1uf...
  12. Any feedback on this? I've since moved the...

    Any feedback on this? I've since moved the capacitor to the area you recommended for my next rev. board, but would like to know if my ground plane design is also a potential cause for concern.
  13. Hey Paul, my decoupling caps are right to the...

    Hey Paul, my decoupling caps are right to the left of the MKL26. I'm using (https://www.digikey.com/product-detail/en/wurth-electronics-inc/885012206071/732-7989-1-ND/5454616). I have 3 .1uf and 1...
  14. Anyone wanna take a crack at this? I'm still...

    Anyone wanna take a crack at this? I'm still pretty perplexed...from what I can gather, I should just have to connect the USB power, then ground the PTB2 for a second, and the port should show up,...
  15. Possible connection issue between MKL02 and MKL26 on Teensy LC

    Hi guys. I have a custom Teensy LC implementation using your bootloader chips and am having issues getting the board to be detected via USB. Here's what I've got going on:

    1. Probing the reset pin...
  16. Hi Ivan, sorry for the delay. Yes, I can confirm...

    Hi Ivan, sorry for the delay. Yes, I can confirm that this code snipped DOES NOT work with the Arduino IDE using Faster optimization & Serial + Midi setting. Sounds like Platform IO is all good.
  17. Using "-D TEENSY_OPT_FASTER", the test project...

    Using "-D TEENSY_OPT_FASTER", the test project does not correctly output the Serial.print()...indicating a crash.
  18. The update fixed it! I was on 4.0. Works with...

    The update fixed it! I was on 4.0. Works with smallest optimization profile. Thanks! You are a wizard!
  19. Still not working with new configuration.

    Still not working with new configuration.
  20. Just ran your project. Same result. What I mean...

    Just ran your project. Same result. What I mean by 'the program crashes' is that I don't see any serial output when using pio device monitor. I should be seeing 'looping' be spit out over and over...
  21. Awesome thanks so much Ivan!

    Awesome thanks so much Ivan!
  22. Any more insight on this guys?

    Any more insight on this guys?
  23. I've tried multiple optimization profiles and...

    I've tried multiple optimization profiles and have the USB type set to USB_MIDI_SERIAL.
  24. Ok quick update, i've ported everything over to...

    Ok quick update, i've ported everything over to the Arduino IDE and things work great. To be honest, I may even like this setup better. It's slightly annoying to have to tab over to Arduino and press...
  25. The platform io system allows you to specify...

    The platform io system allows you to specify build flags which are essentially the same thing as the usb type setting in the arduino IDE. I've had a pretty complicated usb midi project build just...
  26. #include #include ...

    #include <WS2812Serial.h>
    #include <Arduino.h>

    const int numled = 12;
    const int pin = 24;
    DMAMEM byte displayMemory[numled*12]; // 12 bytes per LED
    byte drawingMemory[numled*3]; // 3...
  27. Possible WS2812 Library conflict with USBMidi?

    Hi guys,

    I'm having an issue using the Non-Blocking WS2812B library (https://www.pjrc.com/non-blocking-ws2812-led-library/) with USBMidi. Using the example code for the WS2812B basic library test,...
  28. WS2812B Flickering with WS2812Serial Library

    Hi guys, I'm having flickering issues using the WS2812B LED chips.

    Here's what's going on:
    *This is USB powered, so I have max 400mA to work with. Keeping that in mind...*

    I have 12 WS2812B...
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    USB Track Width / Parallelism

    Hi guys, I just got my first custom teensy boards in the mail and unfortunately I'm not able to get the USB device to show up. I've pushed the program button and also floated the NMI pin but don't...
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    Wow I didn't even know that was possible. I'm...

    Wow I didn't even know that was possible. I'm definitely a beginner here, but I've always thought that SMD with any real component count just needed to be done by a machine. I'm unfortunately in too...
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    Clarifying Crystal Design Guidelines

    Hi Paul and rest of awesome smart people on this forum. This thread (https://forum.pjrc.com/threads/27397-Teensy-gt-Production?p=60903&viewfull=1#post60903), which outlines some of the design...
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    Is this also true of the MKL26Z64VFT4?

    Is this also true of the MKL26Z64VFT4?
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    Yeah I am right now...

    Yeah I am right now...
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    I would also like this....

    I would also like this....
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    Socket for Teensy Bootloader

    Hey guys, I'm planning on using the teensy bootloader chips for a manufacturing run. I have a PCBA partner in China that i've worked with before and I'd like to keep using, but I don't trust shipping...
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    That may be a task for rev. 2. I believe the 58...

    That may be a task for rev. 2. I believe the 58 I/O pin implementation should work for my project as long as I can get good enough results using digital I/O for my LEDs and not doing fancy things...
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    Just out of curiosity, does the EEPROM emulation...

    Just out of curiosity, does the EEPROM emulation code preclude one from using the Teensy LC with an external EEPROM chip & using i2c with wire?
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    Paul, you are an extremely intelligent and...

    Paul, you are an extremely intelligent and dedicated individual. Thanks for the detailed answer!
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    Teensy Bootloader with MK64FX512VLQ12

    Hi guys, I'm thinking about using the Teensy bootloader chip with the MK64FX512VLQ12 for a medium volume manufacturing run and had some questions about the implementation. The MK64FX512VLQ12 has 100...
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    Any more insight on this? I'd like to get a...

    Any more insight on this? I'd like to get a little bit more EEPROM out of my Teensy LC.
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    Teensy LC Half Alive

    Hi guys. I've been using a Teensy LC with my board for about 6 months and it's worked great until I started flashing code using Platform IO & Visual Studio Code. While using VSCode & Platform IO, my...
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    Moving from Teensy LC to Teensy 2.0

    Hi guys, thanks for all your help thus far. I've just successfully funded my teensy project on Indiegogo (www.datalooperpedal.com) and am going to be doing a manufacturing run of about 150 units. I'm...
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    FCC Certification

    Hi guys, I'm in the process of preparing a product for a potential small run (if the Kickstarter goes well) and I was wondering if anyone knows what the general practice, cost and guidelines for...
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    Haha yeah I get it, I guess I'm just of the OCD...

    Haha yeah I get it, I guess I'm just of the OCD mentality where I like the studs behind the drywall to all be perfectly level. If I buy a product, I like to know that I can open it up and all of the...
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    For sure, but for a professional product, having...

    For sure, but for a professional product, having that kind of thing on the board is kind of....well, unprofessional.
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    USB Port Connection

    Hey guys! I've been using the Teensy 3.5 and LC board for a number of prototypes and have had issues with the surface mount usb connector breaking off on a few boards. It seems like with pretty...
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