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    Paul, In the schematic, why is the P-CHANNEL...

    Paul, In the schematic, why is the P-CHANNEL ENHANCEMENT MODE MOSFET component, DMG2305UX, present on the N6, P6 pins (VBUS)? It is different from the MicroMod schmadic. It would seem to be always...
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    Ok, Thanks Paul I switched to the W25Q64JVSSIM_TR...

    Ok, Thanks Paul I switched to the W25Q64JVSSIM_TR chip. The _TR is how they sell the chip, maybe on a reel for pick and place or in a bag?
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    Thanks Paul, That is interesting about the use of...

    Thanks Paul, That is interesting about the use of either PSRAM or Flash (or Both) for large internal variables.

    I was looking at using the W25QXX128MBIT-6X5 as a substitute for the W25Q64JVXGIM...
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    Paul, Would this particular Memory work...

    Paul,
    Would this particular Memory work (W25QXX128MBIT-6X5 )?

    What does the optional PSRAM and Flash memory do in the actual Teensey 4.1? I am wondering if I should add it in to the...
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    Thanks. I do like to joke around. That said, I...

    Thanks. I do like to joke around. That said, I am planning on soldering these chips and hopefully seeing it boot/come to life.

    Knowing that the Teensey 4.1 does indeed work with the given...
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    Thanks for the reply. My bad. I did mean to say...

    Thanks for the reply. My bad. I did mean to say the 1062 chip. It was a copy/paste from a prior google search I made.

    I have a MIMXRT1062DVJ6B in my schematic (based on the MicroMod from...
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    I think I can make a board the way I like. I...

    I think I can make a board the way I like. I copied the sparkfun schematic and am rekeying it into a new one (with additions). It was a learning experience, no obstacle though.

    I can order a...
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    Thanks, I did note the startup sequence and will...

    Thanks, I did note the startup sequence and will pay careful attention.
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    I found this helpful link about stray capacitance...

    I found this helpful link about stray capacitance

    https://www.edn.com/pcb-signal-coupling-can-be-a-problem/

    In practice, I am wondering if people actually calculate the capacitance where traces...
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    Thank you, I will look more about that SparkFun...

    Thank you, I will look more about that SparkFun design. I will download their Eagle files and investigate. I don't really think I have high speed devices in my design. I communicate at 9600 baud...
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    Thanks.. Well, I do like a good challenge. That...

    Thanks.. Well, I do like a good challenge. That said, I sometimes get over my head.

    I do currently have a working radio using an arduino, dr818 vhf chip, low pass filter , etc ... it does work....
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    Thanks, I will be ordering that as soon as I...

    Thanks, I will be ordering that as soon as I design my board and send it off.
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    This is the schematic for the Teensey 4.1 ...

    This is the schematic for the Teensey 4.1
    https://www.pjrc.com/teensy/schematic.html

    I am wondering if anyone has this in an electronic format that I can work with/modify. Yes, I know I can...
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    Thank you. It does seem promising. That was a...

    Thank you. It does seem promising. That was a good video, especially the part that showed the testing of connections via the internal diodes of the soldered chip.
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    Ok, Thank you. I'm wondering how tough/risky it...

    Ok, Thank you. I'm wondering how tough/risky it is to solder a BGA chip to a PCB with a hot air gun? I do not have any way to XRAY the board.
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    Teensey 4.1 Schematic For Small Project

    Hi,
    I am looking for an eagle download of the Teensey 4.1 Schematic as well as versions of the cpu and supporting chips in SMD size. After buying an SMD Hot Air station to fix some broken PCB's,...
  17. I was wondering if there was any update to this. ...

    I was wondering if there was any update to this. I too am interested in having my Teensy 4.1 sleep with the most minimal power draw as possible/wake up to do something useful. I had hopes for the...
  18. I have errors when the compiler looks for ...

    I have errors when the compiler looks for

    openRoot

    I did look in the header files and see that SDFat is included. I see no reason why I can't compile/error. Is there something wrong with my...
  19. SD Card on Teensy 4.1 Using SD Fat Library

    Hi,
    I had some code that worked on Arduino. After switching to Teensy there were some breakages.

    Some code that broke is related to using the sd card.

    I have been able to use the...
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    Ok, I suppose that's the tradeoff for having mind...

    Ok, I suppose that's the tradeoff for having mind blowing speed and resources on the Teensey.
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    Teensy 4.1 Low Power

    Hi,
    I am trying to port some code that I had compiling under Arduino to the Teensey 4.1. The code used the Sleep library? Does the sleep library work under 4.1? I noticed that the github page...
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    Thank you Robin, That's really nice. I will...

    Thank you Robin, That's really nice. I will private message you the order details. I printed a pdf from my Amazon Account of the purchase/address of the my order. It was sold through a seller on...
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    Thanks Paul, I bought the board from Amazon. Are...

    Thanks Paul, I bought the board from Amazon. Are you selling through Amazon?

    Is that a valid distributer? Where should I be buying the boards from?
    I guess my Teensey must be damaged.
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    I did not resolve this. My Teensey still has...

    I did not resolve this. My Teensey still has this problem. I'm wondering how much to really invest in Teensey system if this problem tends to happen and there is no way out. I was thinking I could...
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    Hello, Does anyone have advice as to how I can...

    Hello, Does anyone have advice as to how I can revive my Teensey? Is there a way to set it in a state that I can then program it. Thanks,Jeff
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    The headers are soldered to it. It worked...

    The headers are soldered to it.
    It worked perfectly the last time I used it a few months ago. It has sat idle.
    It was last used to drive a SmartMatrix board that connected to an RGB panel. ...
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    I tried the 15 second restore but it did not work...

    I tried the 15 second restore but it did not work as expected.

    I did see the short quick flash after about 15 seconds of pressing the button, but the device never showed a stead red light to...
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    Hi, Is there an update to this issue? I'd...

    Hi,

    Is there an update to this issue? I'd like to load firmware, but cannot. I see the loader error at line
    23:31:18.259

    "(loader): Opps, NXP ROM in open mode, but we do not yet have code...
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    Teensey Loader Problems

    Hi,
    I have been having problems loading new code onto my Teensey 4.1. I have tried several different sample programs and 2 known/working usb cables.

    The log from a verbose snapshot from the...
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    I am not sure how to delete this post. After a...

    I am not sure how to delete this post. After a little searching, I think the snooze library will work fine.

    Jeff
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    Deep Sleep , Wakeup of Teensey 4.1

    I am trying to reimplement some code that I had working on an arduino in a Teensey 4.1 implementation. The code on the arduino used an external RTC clock to wake up the arduino some point after it...
  32. Thank you, I guess my next move is to order a...

    Thank you, I guess my next move is to order a Teensey shield, or 2.
    Jeff
  33. Thanks for all the help, I will have to look at...

    Thanks for all the help, I will have to look at the schematic of the Teensy shield. I was hoping to use just the library to connect the Teensey directly to a single RGB panel on its HUB 75 input and...
  34. 24764 I have the device attached in the...

    24764

    I have the device attached in the picture. This device will attach to a Raspberri Pi computer and drive 3 rows of RGB panels. It attaches to the HUB 75 input of the rgb matrix panel. In...
  35. Thank you. I will look into the Fadecandy...

    Thank you. I will look into the Fadecandy Server/dual Teensys and likely pursue this route.

    When I last looked into using the FPGA, I remember there being timing issues. I became concerned...
  36. SmartMatrix LIbrary, 64X32 RGB Panel, Teensey 4.1, and Raspberry Pi 3 advice

    Hi,
    I have a Teensey 4.1 on order and wish to experiment with using it on an 9 X (64 X 32) RGB Panel array. I had thios project working using the Raspbery Pi along and a library that flashed the...
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