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    You are right, the 0402 is more difficult than...

    You are right, the 0402 is more difficult than other sizes, only should be used when you don't have other sizes available.

    I buy microSD in a reel from a Chinese manufacturer that only sells to...
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    Sorry I was busy this weekend with something...

    Sorry I was busy this weekend with something else.

    @kurt - I bought microSDs in a reel from a manufacturer, one of our suppliers. I don't know where you can get it. I could not find it on eBay....
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    @MichaelMeissner - I added all pads I could on...

    @MichaelMeissner - I added all pads I could on both versions, with or without USB host.
    The new boards are available at Oshpark.

    https://oshpark.com/shared_projects/vzG532jm
    ...
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    @PaulStoffregen - Using FRDM4236 is OK, thanks. ...

    @PaulStoffregen - Using FRDM4236 is OK, thanks.

    @KurtE - Glad you had good results. Blackketter's USB board works on his breakout board and it should work on FRDM4236 board. I don't expect any...
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    The FRDM4236-V3 breakout board is available at...

    The FRDM4236-V3 breakout board is available at Oshpark. https://oshpark.com/shared_projects/8rSyUnt5
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    @MichaelMeissner - I think it's a good idea. I...

    @MichaelMeissner - I think it's a good idea. I will add all pads and make a V3A board. Thanks.
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    Test log files: ...

    Test log files: www.trainer4edu.com/edubase_teensy/frdm4236_test_log.zip
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    I tested it today. The results are as follows: ...

    I tested it today. The results are as follows:

    1. It works at 912 MHz OK, no heat sink is needed, no fan is needed to cool the T4.
    2. For 960 MHz, with a small USB fan to cool, it ran OK...
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    @defragster: From what you explained I am sure...

    @defragster: From what you explained I am sure that the T4 is overheated and burnt. The V3 and GND and a few other pins are all short together internally. The 3V regulator is in the thermal shutdown...
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    @defragster: Thanks for your testing, it's a lot...

    @defragster: Thanks for your testing, it's a lot of time spent. I am sorry for the problem. I will test here. When it's done and if nothing is wrong, I will send you one for your testing again. ...
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    @DaQue: I did not intentionally to break it into...

    @DaQue: I did not intentionally to break it into pieces. I started it with V1 to make a Teensy V3.6 compatible before seeing blackketter's USB host. I was going to stop there, but some forum members...
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    I have not used non-clean flux regularly for 20...

    I have not used non-clean flux regularly for 20 years, except a very few special cases like this to demo and on a board cannot be cleaned by water.
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    @DaQue: Sorry for confusing anyone. The one you...

    @DaQue: Sorry for confusing anyone. The one you should visit is http://www.trainer4edu.com/edubase_teensy/frdm_4236.html for assembling instructions. On the top of that page you can jump to...
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    @defragster: Thanks, as you suggested I extended...

    @defragster: Thanks, as you suggested I extended the PCB and picked up the D+ and D-. I added an external 5V pin for the VUSB of blackketter's board. The new PCB is available at Oshpark. See more...
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    Some members would like to use the FRDM4236...

    Some members would like to use the FRDM4236 breakout board to test USB host function. Since blackketter made a nice small USB card I will make the FRDM4236-V2. It will bring out a 6-pin female header...
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    All 3 are sold.

    All 3 are sold.
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    Thanks Palmerr for your Eagle lib...

    Thanks Palmerr for your Eagle lib
    ************************************************

    neurofun is right, any size ranging from 0402 to 0805.
    If you happen to have one size, but no other sizes, you...
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    Thanks blackketter, I did not think about the...

    Thanks blackketter,
    I did not think about the USB port. If a USB port needs to be made, I guess that it can be made by a small separate PCB with a female header to provide USB signals: 5V,...
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    Thanks DerekR, The 1.0mm pitch castellated holes...

    Thanks DerekR,
    The 1.0mm pitch castellated holes were all good for my a 0.8mm PCB made by Oshpark. In the future as long as they route out all cut off holes, their PCB will be usable. My board is...
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    Thanks Micheal.

    Thanks Micheal.
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    I made a third Teensy 4.0 breakout board with...

    I made a third Teensy 4.0 breakout board with Teensy 3.6 footprint. it worked as a 3.6.**
    You can order it at Oshpark, but make sure to ask them not to miss any castellated holes....
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