SparkFun To Manufacture Teensy

I have a limited quantity of the double-insulator version available: https://protosupplies.com/product/header-male-1x14-double-insulator/

I personally tend to use these more commonly available extended tail headers to build assemblies and just live without the 2nd insulator. By flexing the outer pins out a bit before installing the top board, the spring action will hold it in place pretty well until it is tack soldered in place. https://protosupplies.com/product/header-male-1x40-break-away-extended-tail-gold/

These also work well if you want to put something like an adapter on top of a Teensy 4.1 and still maintain all 24 pins. You can just clip off the unused extended pins. You can see some pics of that type of usage here: https://protosupplies.com/product/teensy-4-audio-stack/
 
Twin T_4.0's in action
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Treadmill vs. Real Hill: Which is harder to run
 
Mcu32 said:
I'm just looking to see if there are any new developments, hardware or software.
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I think that now that SparkFun are doing the Teensy manufacture Paul will have more time to devote to new Teensy Ideas and projects.
How are you keeping. Fine I hope.
 
Anyone here know what the deal is with Sparkfun not ever having T4.1's available? Specifically the no header, no eth variety. I've visited several times in the last few weeks and they are always listed as on backorder.. I keep having to buy from Adafruit and/or Mouser but I would like to get the better discounted 25+ pricing from SparkFun. Oddly, Mouser shows plenty of stock on the Sparkfun Teensy Part #s but are priced much higher with no qty discounts..
 
Mcu32 said:
2 T4 needed for a line follower.. what's next? :)
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A bit of overkill for sure :) - but watching the video one is handling the line steering and the other purposefully isolated for motor drivers as the goal was to measure current draw for the motors

HI Frank!
 
Gremlin said:
Anyone here know what the deal is with Sparkfun not ever having T4.1's available? Specifically the no header, no eth variety. I've visited several times in the last few weeks and they are always listed as on backorder.. I keep having to buy from Adafruit and/or Mouser but I would like to get the better discounted 25+ pricing from SparkFun. Oddly, Mouser shows plenty of stock on the Sparkfun Teensy Part #s but are priced much higher with no qty discounts..
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I heard that they have all the parts on-hand but they’re still ramping up production. They told me about 10 days ago that it’d possibly be another 4-6 weeks.
 
I wonder if there is a way to tell the new Teensy is manufactured by Sparkfun ? It would be useful to know.
 
Look at the date code on the main processor. The last chips PJRC received from NXP had date codes in early 2024.

If you see a date code higher than 2420, you can be sure Sparkfun manufactured that board. But it's theoretically possible (though unlikely) Sparkfun could have received older chips, so date codes before 2420 aren't a 100% guarantee PJRC manfactured it.
 
Parts I have received from Sparkfun do have newer 2503 date codes, not to say there aren't some older parts out there.

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The boards appear identical including fab and overall build quality under a microscope. Also the bit hashes by the USB connector are the same.

I did notice a designator on the PCB that changes from time to time. Not sure if this is a PCB fab lot code or something. It is different also under different batches of PJRC product. Looking at 3 different lots just now, I see this marked as C4, C2 and A6. This C4 marked board happens to be a Sparkfun board.

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Gremlin said:
Anyone here know what the deal is with Sparkfun not ever having T4.1's available? Specifically the no header, no eth variety. I've visited several times in the last few weeks and they are always listed as on backorder.. I keep having to buy from Adafruit and/or Mouser but I would like to get the better discounted 25+ pricing from SparkFun. Oddly, Mouser shows plenty of stock on the Sparkfun Teensy Part #s but are priced much higher with no qty discounts..
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Sparkfun have the T4.1 in stock now. Just placed an order with them.
 
KenHahn said:
I did notice a designator on the PCB that changes from time to time. Not sure if this is a PCB fab lot code or something. It is different also under different batches of PJRC product. Looking at 3 different lots just now, I see this marked as C4, C2 and A6. This C4 marked board happens to be a Sparkfun board.
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Teensy boards are made in panels. This code indicates the board's position within the panel.
 
shawn said:
Are you referring to the six-part sequence of longer and shorter lines next to the micro USB connector? If so, I was wondering what they’re for?
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Yes, that. Paul once noted IIRC that was to ID the PCB maker? ... I found three here and they all had the same hashes with 1062 dates: 2117, 2007 - the third recent from @KenHahn is screwed back under display.
Another pair dated 2232 PJRC sent in Feb 2023 and have the same Hash code { sh LONG sh sh sh LONG } as the ones above - so pretty static on the T_4.1. Two others same hashes are dated as: 1985 and 2117 and a handy one with white PJRC printed LOCK dated 2208 has same hash.

Maybe @KenHahn could look and see if SFun made a change for any reason
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