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  1. Thank you

    Thank you
  2. Sample programs to gather data from three I2C buses

    Hi, are there sample programs to show new users how to use those three I2C buses to gather data?
  3. Sample program to read and write data using the builtin sd card reader of Teensy 4.1

    Hi, is there a sample program on how to do that?
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    Thank you. Do you mean this one? It was made last...

    Thank you. Do you mean this one? It was made last year but I think Teensy 4.1 came out this May. The stuffs on I2C is in Chapter 47. Maybe I got the wrong manual?...
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    Hi, are those three I2C on the Teensy 4.1...

    Hi, are those three I2C on the Teensy 4.1 separate independent buses or do they share the same bus?

    Are there simpler examples or tutorials on how to get data from I2C device(s) connected to one...
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    Thank you. Sorry for the confusion. I am...

    Thank you. Sorry for the confusion. I am considering whether or not to use an I2C multiplexer. If we use an I2C multiplexer, the multiplexer needs to switch to different channels and time is lost due...
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    I2C ports on Teensy 4.1

    Hi, am I correct that those three I2C channels/buses (SCL-SDA, SCL1-SDA1, SCL2-SDA2) on the Teensy 4.1 are addressed differently? Can all three of them be used to gather data in real-time and...
  8. Thanks @MichaelMeissner. There is a photo of the...

    Thanks @MichaelMeissner. There is a photo of the back of the Teensy 4.1 at:

    https://www.pjrc.com/store/teensy41.html (just above USB Host)

    I see there is a row of pins next to the winbond...
  9. Need clarification on the two 3.3V power output ports and the Vin port

    Hi, according to the Welcome to Teensy 4.1 card that came with the board, there are two 3.3V. The one above A10 on the left is 3.3V while the one above A9 on the right is 3.3V (250 mA max). For the...
  10. Thank you.

    Thank you.
  11. Thanks. So from a user's point of view, just...

    Thanks. So from a user's point of view, just treat it as if it were an Arduino.
  12. It seems that blink_fast.hex for Teensy 4.1 is...

    It seems that blink_fast.hex for Teensy 4.1 is missing. Without it, I cannot continue the Getting Started guide.

    Can we use the Teensy 4.1 the same way as we do when using the Arduino? For...
  13. Thank you

    Thank you
  14. Using Teensy Loader on Mac OS X and outdated Getting Started guide

    Hi, I got Teensy 4.1. I need some help to get started.

    According to the Welcome to Teensy 4.1 card which came with the board, we should visit www.pjrc.com/teensy and follow the Getting Started...
  15. Thank you. How do I know if it needs to complete...

    Thank you. How do I know if it needs to complete some EEPROM or SD Card or other data storage for data integrity?
  16. What is the proper way to turn off Teensy 4.1?

    Hi, what is the proper way to shut down Teensy 4.1 after use? It is safe to just unplug the usb cable or the battery?
  17. Thank you for the detailed explanation. Do you...

    Thank you for the detailed explanation. Do you know if https://www.sparkfun.com/products/16996 is tall enough to clear the JST PH connector of the Feather Wings? I guess another option is to just...
  18. Thank you!

    Thank you!
  19. What is the difference between Teensy 4.1 from SparkFun, Adafruit and PJRC direct?

    Hi, are they the same thing? It looks like SparkFun offers two versions (one with header pre-installed and the other without). Besides that, are there other differences?
  20. Given that the Teensy's Vin accepts 3.6 to 5.5V...

    Given that the Teensy's Vin accepts 3.6 to 5.5V and the TCA9548A accepts 1.8-5V, can I power both of them using one or two 3.7V LIPO battery? I have a few spare ones with JST-PH connector.

    How do...
  21. Excellent idea! I don't have the board with me....

    Excellent idea! I don't have the board with me. Which is the dimension of the 10k resistors to use?
  22. Why it is better to run at 3.3V than 5V? Is...

    Why it is better to run at 3.3V than 5V?

    Is there other I2C multiplexer faster and better than the TCA9548A while fully compatible with the Teensy 4.1?
  23. Thanks. In case I want to run at the highest I2C...

    Thanks. In case I want to run at the highest I2C speeds, what should I do?

    I can't try it myself as I have not bought a Teensy yet. I will buy it after confirmation of compatibility.

    If the...
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    LIPO for Teensy 4.1 Development Board

    Hi, Can this board be powered via a laptop's USB port like the Arduino? In case of powering via battery, what LIPO batteries do you recommend?
  25. Teensy 4.1 Development Board and Adafruit TCA9548A

    Hi, are these two products fully compatible with each other? Is it as simple as plug and play like using the TC9548A with other Arduino controllers?
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