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    Yes, the ends are slightly more than 1/2 the...

    Yes, the ends are slightly more than 1/2 the distance between pins. However, still probably easier than cutting with pliers and trimming with a Dremel. I just took 2 of the female headers, and held...
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    Or 3/ea 8-pin headers, easier to find but may be...

    Or 3/ea 8-pin headers, easier to find but may be a bit more expensive. I bought 100/ea of 8-pin and 100/ea 6-pin stackers from ebay a couple of years ago, and been using them on everything. Similar...
  3. Thought I would address the breadboard issue a...

    Thought I would address the breadboard issue a bit more, in regards making a T3.x with additional parallel rows of pins on the top and/or bottom edges. Cosford mentions here a viable solution.
    ...
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    Aha, so simple. Thanks.

    Aha, so simple. Thanks.
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    Yes, very astute remote debugging on GW's part!!...

    Yes, very astute remote debugging on GW's part!!

    I had the same problem. I would use USB-serial with my T3.x boards, which required the ... while (!Serial()) ... line in the setup() in order to...
  6. Michael, see the private message. Also, I had...

    Michael, see the private message. Also, I had once thought about maybe selling them, but actually there was a big gold rush of people producing carrier boards when the T3.5,3.6 came out, and I lost...
  7. Duh, and I saw that thing too, double-Duh! Other...

    Duh, and I saw that thing too, double-Duh! Other than pleading "total stupidity, have mercy", I guess I can say it doesn't look like that Ada adaptor will adapt a T3.6, which could be done with a...
  8. I was just looking at Digikey and they sell a lot...

    I was just looking at Digikey and they sell a lot Feather "Wings", which are the Ada add-on boards, so it would make sense for Paul to produce a board that can accomodate the Wings. Unfortunately the...
  9. Too late, the dogs of war are already gathered,...

    Too late, the dogs of war are already gathered, :-).

    The trouble with Feather and Arduino-MKR form-factors is they do not have enough I/O pins to even be remotely attractive, although having...
  10. https://www.adafruit.com/product/2772 The...

    https://www.adafruit.com/product/2772

    The Feather board, that people keep bringing up, is like comparing a 1918 Model-A Ford to a 2018 Audi. Feather basically has the power of a T-LC, and only 20...
  11. Maybe Paul should trademark "Eeensy Weensy...

    Maybe Paul should trademark "Eeensy Weensy Teensy" before it's too late. Also, FYI:
    https://www.kididdles.com/lyrics/e001.html
  12. Paul has the great fun of trying to be all things...

    Paul has the great fun of trying to be all things to all people, :-).

    - I use T3.1,3.2 for most projects, and rarely need all of the available I/O pins as it is, although some of my robots do use...
  13. Or, you just do the same as whatever you do now,...

    Or, you just do the same as whatever you do now, you just have 2X as many.
  14. Umm, that would have to be the Weengsy and not...

    Umm, that would have to be the Weengsy and not the Wingsy, although it would be pronounced the exact same way, at least in America.

    I have a number of projects where I've soldered R-A headers into...
  15. If by this you mean UNO-formfactor, then it...

    If by this you mean UNO-formfactor, then it wouldn't be a "Teensy" anymore. However, if Paul keeps designing new boards with oodles more I/O pins, then he'll have to bite the bullet in some manner or...
  16. Single-layer pcbs = out of the question, probably...

    Single-layer pcbs = out of the question, probably also for 2-layer; but extra pins along the edges may make routing slightly easier.

    No one in their right mind would build a system on a...
  17. Yes and no big deal, as I see it, considering the...

    Yes and no big deal, as I see it, considering the added convenience. Also, if there are plans for future boards having even more I/O pins, this would be a "relatively" painless way to go. And for a...
  18. Is there a link to this putative Teensy 4.0? I've...

    Is there a link to this putative Teensy 4.0? I've done a google search but not quite found what looks to be such a thing.

    I'm not suggesting Paul do this, but if I were adamant about bringing the...
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    Also, I am not controlling the RFM radios...

    Also, I am not controlling the RFM radios directly with the T3.1 here, as the T3.1 already has lots of work to do with ethernet and everything else, and I've wanted to keep the lone T3.1 SPI port...
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    Aha, that link is not on the main Products page.

    Aha, that link is not on the main Products page.
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    Paul, is there a replacement for this? Ethernet...

    Paul, is there a replacement for this? Ethernet not shown on your products page.

    https://www.pjrc.com/store/wiz812_adaptor.html
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    The RFM radio stuff is not shown on the webpage...

    The RFM radio stuff is not shown on the webpage as yet. For the remote nodes, I am currently using the RFM69 radio at 100-mW along with the Moteino-Mega-1284 modules from lowpowerlabs. 100-mW is the...
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    Update to what I did a couple of days ago. I...

    Update to what I did a couple of days ago.

    I am using the Teensy 3.1 in a home security alarm system, which has multiple sensors (IR detectors, PIR, sonar, environmental, &etc), Ethernet to my...
  24. Paul, thanks, I wondered about the 1-usec vs...

    Paul, thanks, I wondered about the 1-usec vs 3-usec thing at the top of the screen.

    I think your figures illustrate my point about the latency in the T3.1,3.2 SPI xfer, although it's not quite as...
  25. Cool, I always love it when I create an instant...

    Cool, I always love it when I create an instant firestorm, :-). I was in court this week, and managed to create one there too (audible gasp from the adverse party!!).

    Paul,
    1. I'm sorry, but I'm...
  26. Other people might disagree with me but ... from...

    Other people might disagree with me but ... from my experience ... even fiddling with those register values, you're still not going to get SPI data transfers as fast as on a 16-MHz Arduino. At least...
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    variable historical tracking

    I thought I would share this with the group. It's possible someone else already invented the idea, in which case "Never Mind", :-). Someone might take a look at the code, and see if I have made any...
  28. Good find, Frank. It sounds like, for proper...

    Good find, Frank. It sounds like, for proper reset, the SD spec wants a pullup on CS, I am assuming, at the time when power is applied to the card. Is that how you interpret it? In which case, the...
  29. BTW, one thing I recall is that there are 2...

    BTW, one thing I recall is that there are 2 different sketches in the SD library examples folder, CardInfo.ino and listfiles.ino, and the former never worked properly for me, going all the way back...
  30. Hmmm, I see I made a lot of posts on this thread....

    Hmmm, I see I made a lot of posts on this thread. Since then, I have been working on other projects and not using SD cards on my T3.6 boards, so I've had no follow-up.

    Frank, what size SD card are...
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    "well-known" - maybe not the best choice of...

    "well-known" - maybe not the best choice of terms, :-).

    When this was going around a couple of years ago on the arduino forum, Bill Greiman said he had implemented the extra Sclk pulses into the...
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    dave, there is a well-known problem with trying...

    dave, there is a well-known problem with trying to use SD cards on the same SPI buss with anything else. The problem is SD does not release the MISO pin properly after CS is de-asserted. You can...
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    Aha, ok I held Prog for "exactly" 15-sec, and it...

    Aha, ok I held Prog for "exactly" 15-sec, and it did wipe the program this time, but did not fix the finger-blistering problem. So I guess it's T3.5 = RIP.
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    Actually, holding down Prog [and also Reset] for...

    Actually, holding down Prog [and also Reset] for 20+ sec did NOT wipe the program, and also did not fix the overheating problem. You apparently need input from the IDE before the program is wiped....
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    Thanks, I had not heard of that trick, and tried...

    Thanks, I had not heard of that trick, and tried several times to no effect.
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    No matter how it's being powered, the MCU gets...

    No matter how it's being powered, the MCU gets hot enough to burn your fingers. The 720 mA is all drawn by the Teensy module. The 3.3v buss pins on the module headers all read proper 3.3v. Even so,...
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    Truth is, I have no idea whatsoever how all the...

    Truth is, I have no idea whatsoever how all the buss voltages can be reading ok, the module can be drawing 720 mA, and the cpu chip being hot enough to burn your fingers, and it's still running the...
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    Ah, very astute. PTC is "gone", I pulled it off...

    Ah, very astute. PTC is "gone", I pulled it off the board first thing. Along the way, I discovered the board came back to life when I shorted across the PTC with a screwdriver, so I tried to solder a...
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    Thanks for the quick response Paul....

    Thanks for the quick response Paul. Unfortunately, I think it's more than just v.reg now. The existing external 5V and 3.3V v.regs on my pcb are 1A D-Pak, and have been working fine with multiple...
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    minor disaster with T3.5 board

    Yeah, as stated. It appears I have blown up part of the v.reg circuit on my T3.5 board. Robot turned over, and something shorted out, duh.

    I can supply 3.3V to the Teensy module from an external...
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    Since you mention this .... I have a home...

    Since you mention this .... I have a home automation system "almost" implemented that uses $3 Hope RFM radios and Arduino mega328 chips for remote nodes, so the nodes are cheap. I can distribute...
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    One way to deal with the forgetfulness problem is...

    One way to deal with the forgetfulness problem is that I use a small hepa air filter next to the soldering space to suck up the solder fumes, and I can hear the fan running from the other room,...
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    Speaking of stripping out plastic, I never do...

    Speaking of stripping out plastic, I never do that since my fingers are so well calibrated [right!!!], but I read that if you ever do such an evil thing, you can insert a short piece of smallest size...
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    Takes a bit of playing to get the Velleman...

    Takes a bit of playing to get the Velleman optimally set. First align the pcb into a balanced position, like the first pic, and not the 2nd,...
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    If you'll notice, there are 2 thumb screws at the...

    If you'll notice, there are 2 thumb screws at the top that keep the pcb from rotating when tightened.

    I've used a panavise for years but the one indicated is far superior. Basically, instant...
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    OP, now that you're getting into soldering, the...

    OP, now that you're getting into soldering, the next thing you will realize is boards and components jump around all over the place when trying to solder. I've often wished I had a 3rd hand. There...
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    Rather than using a Serial.print() inside the...

    Rather than using a Serial.print() inside the ISR, I should think it would be a lot better - and especially when ISR timing is critical - to capture the values (_mode<<8 | irq_flags) either to a...
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    @foyd, I haven't looked into that particular RF...

    @foyd, I haven't looked into that particular RF module, but have been using the Hope RFM radios for a couple of years. They are a somewhat cheaper, and have xmit power to 20 dBm and good library...
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    Wow. And some of us have long dreamed of having...

    Wow. And some of us have long dreamed of having an atan(), LOL. I notice there is both
    - double atan(double x);
    - float atanf(float x);
    and I assume the 2nd makes use of the T3.6 FPU, maybe?
    ...
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    Aha, very nice. News to me. As long as you are...

    Aha, very nice. News to me. As long as you are updating pages, Paul, would be nice to add description of this feature. Eg,
    https://www.pjrc.com/teensy/td_serial.html...
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