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Thread: Teensy 4.0 Breakout Kit

  1. #401
    Senior Member ETMoody3's Avatar
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    I'm no expert, but after some trial I set the temp to 20 degrees c above the solder paste temp and leave the flow low. Remains to be seen if I'll damage the gun that way, the temp is at the low end of the gun's range so...I'm guessing it should last. If not, oh well... another fee paid towards learning. $40 gun off of Amazon.

    I've done some test work with the pre heater and without, with good results either way...I reckon the potential warping of a circuit board goes hand in hand with the size.

  2. #402
    Senior Member+ mjs513's Avatar
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    Quote Originally Posted by ETMoody3 View Post
    I'm no expert, but after some trial I set the temp to 20 degrees c above the solder paste temp and leave the flow low. Remains to be seen if I'll damage the gun that way, the temp is at the low end of the gun's range so...I'm guessing it should last. If not, oh well... another fee paid towards learning. $40 gun off of Amazon.

    I've done some test work with the pre heater and without, with good results either way...I reckon the potential warping of a circuit board goes hand in hand with the size.
    I picked up one of these years ago and used it maybe twice: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1. Maybe its time to pull it out again and figure out how to use it.

  3. #403
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    A bit off topic but if you are want to improve your soldering skills, here's a video showing the SMD assembly of a new Russian SDR (software defined radio) kit. It's not a tutorial, but it shows all the SMD soldering techniques in action (including the drag method and hot-air reflow on some very large ICs). It's interesting to see how the surface tension actually drags the chips and aligns the chips. The guy is super fast! Unfortunately the commentary is in Russian. Later in the video it shows the completed SDR in action which (to me) is also impressive.

  4. #404
    Senior Member ETMoody3's Avatar
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    I decided I wanted to try a breakout on a project so I went ahead and did this much assembly...no CAN bus parts, no pull ups. I used solder paste and a heat gun. Small bits of copper tape were used to hold down the flex cable. As soon as I finish the through hole soldering I'll report on testing. I did check for shorts and continuity. So far so good.

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  5. #405
    Senior Member ETMoody3's Avatar
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    Yup, everything works. USB Host worked with every device tested.

  6. #406
    Senior Member+ defragster's Avatar
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    Quote Originally Posted by ETMoody3 View Post
    Yup, everything works. USB Host worked with every device tested.
    Good job, I think I posted I built one of the second betas to work. Just used a hand iron and solder wire this time.

    I noticed the 1220 cell on my first Beta board was dead. Since I put headers on wrong/bottom side - pinning it in - I desoldered it - and used the spare NEW style holder (thanks Dan) - snipped off bottom centering pins - soldered one vBat end with Kapton tape under the other end and then jumpered that end to nearby GND pin and it is back in service. Not sure if the unpowered T_4 used up that much power - or if the cell started weak?

  7. #407
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    Is there a reason why you use a flex cable over 1mm pitch right angle headers for the pads on the underside of the teensy?
    It seems like a lot more work and cost to using this flex cable.

  8. #408
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    Hi Guys,

    Is this T4 breakout available to buy as a kit yet ?

    If so can someone please post a link ?

    Cheers
    Jay

  9. #409
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    Hi guys,

    Any news on this breakout board?

    Miloš

  10. #410
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    Quote Originally Posted by Miloš View Post
    Any news on this breakout board?
    Yes, the first run of boards are being assembled now.

    The production time has been delayed because of the virus outbreak in China.

    The current estimate is that they'll be ready in about 30 days.

  11. #411
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    Nice, thanks for the info. Does that mean that we will be able to order the kit via your website on Tindie? Will you offer kits with Teensy 4.0 included?

    Miloš

  12. #412
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    Quote Originally Posted by Miloš View Post
    Does that mean that we will be able to order the kit via your website on Tindie? Will you offer kits with Teensy 4.0 included?
    Yes, and yes!

  13. #413
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    At long last: https://www.tindie.com/products/19936/

    Don't forget to use the code PJRCFORUM25 to save 25 percent!

    Please accept my apologies for all the delays. First, the pandemic delayed SMD assembly in China significantly. Then it rendered my workshop and storage space here in the United States inaccessible. We're still under lockdown here in Massachusetts.

    Thank you so much to everyone who assisted with feedback, suggestions, debugging, and beta testing.

    Assembly instructions are still in progress, but will be available at https://talldog.dozuki.com when they're finished.

    In the meantime, you can check out the datasheet.

    Sincerely,
    Dan

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  14. #414
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    Ordered this morning

  15. #415
    Senior Member+ defragster's Avatar
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    Very cool you got it all together @loglow/Dan/TallDog ! Bummer on the long delay to get there.

    The Beta I assembled has been one of my active T4's here during testing since you sent it out months back. USB Host and SD card all usable. Will be nice for assembly having the SMD parts pre-soldered on he PCB!

  16. #416
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    Quote Originally Posted by Miloš View Post
    Ordered this morning
    Thanks!

  17. #417
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    Quote Originally Posted by defragster View Post
    Very cool you got it all together @loglow/Dan/TallDog ! Bummer on the long delay to get there.
    Yeah, but delays seem to be the normal these days...

    Quote Originally Posted by defragster View Post
    The Beta I assembled has been one of my active T4's here during testing since you sent it out months back. USB Host and SD card all usable. Will be nice for assembly having the SMD parts pre-soldered on he PCB!
    That's great! I so much appreciate your testing. SMD soldering is definitely not for everyone, so I'm very happy to have gone the pre-assembled route.

  18. #418
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    I got my boards safely yesterday. Starting a new project next week. Thank you so much loglow. Hey, do you plan on releasing the Eagle file for this board?

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