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    The first thing I would do is ensure that you...

    The first thing I would do is ensure that you send 64 bytes each time, since the USB packets for Serial contain 64 bytes the OS / USB Stack might delay for a few milliseconds in the hopes of filling...
  2. Another method of converting the images into the...

    Another method of converting the images into the right format is using GIMP, I made a post about that yesterday: 35575-Export-for-ILI9341_t3-with-GIMP, it's a free cross-platform image editor....
  3. O_O That is indeed a major bummer :( I was going...

    O_O That is indeed a major bummer :(
    I was going t say that you could drill the holes yourself with a precise drill-press, but I noticed that some of the via's aren't drilled either, which makes it...
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    Export for ILI9341_t3 with GIMP

    Yesterday I was working with the ILI9341 library and came across the pictureEmbed example. I quite liked the idea of using custom images into my project, when I got to the image conversion part I...
  5. To ensure that you don't have to worry about...

    To ensure that you don't have to worry about separately uploading an server and a client program you might want to have both use the same sketch and depending on a digitalRead() drop either into...
  6. By default the constructor...

    By default the constructor is called with interruptPin=2, just to be certain, DIO0 of the RFM radio module was wired to Pin 2 on the Teensy? That pin is used to read whether the radio has finished...
  7. The fact that setting the reset pin LOW is...

    The fact that setting the reset pin LOW is required could indeed have something to do with the level shifter, I for sure know it's not necessary when the reset pin is directly connected from a...
  8. Okay, I believe I have found a possible...

    Okay, I believe I have found a possible culprit... The hint was that the printRegisters() method is not available and the path you linked... The printRegisters functions is documented in the docs.......
  9. In theory this would indeed be possible... but...

    In theory this would indeed be possible... but imax (page 15) specifies 1mA, so you would hardly be able to see that the LED is lighted or not. In addition; even though one could probably create some...
  10. @Bugeye60; About the capacitor, it does indeed...

    @Bugeye60; About the capacitor, it does indeed look like it's already on board with Sparkfun's adaptor, so you should be alright there. Be sure to try setting the IRQ pin to input mode next time you...
  11. Some tips from my side: If you have an SDR...

    Some tips from my side:

    If you have an SDR dongle (RTL2832U for example) you can use it to hear the data being sent, might help debugging.
    If you disable the sequencer and put it into Tx...
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    On ubuntu 14.04 using a teensy 3.2 it finishes in...

    On ubuntu 14.04 using a teensy 3.2 it finishes in 5.728165 seconds with no fails, I think I do see a problem however: In the loop function you call read_hash when you have more than one byte waiting....
  13. The barbecue lighter trick sounds very similar to...

    The barbecue lighter trick sounds very similar to 29441-Teensy-LC-resets-due-to-EMI, just holding the piezo element close to the PCB causes a reset. I could also just reset the Teensy (with blink, no...
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    This is the Teensy forum, so it makes sense that...

    This is the Teensy forum, so it makes sense that everyone is writing about it. The Teensy is a development board with a microcontroller. So the Arduino and Teensy fit in the same category, but they...
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    I'm not entirely sure about this, the paragraph...

    I'm not entirely sure about this, the paragraph on the Nwake pin states: "NWake is a high-voltage input used to wake up the SN65HVDA195 from low-power mode. NWake is usually connected to an external...
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    The diode should be alright, I also use 1N4007's....

    The diode should be alright, I also use 1N4007's. I presume you mean you left out both D2 and R1? With those left out, so only Vsup (12v for my test) powered through a 1N4007 (D1 that is), floating...
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    The wikipedia page OBD-II_PIDs...

    The wikipedia page OBD-II_PIDs is quite helpful in this regard. But I have to agree, not all cars support the same PID's, mine does not support the fuel level like you mentioned. I thought this was...
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    I'll bite; The most commonly known project which...

    I'll bite; The most commonly known project which deals with the OBD port is to the best of my knowledge the opengauge / obduino project, the original project page is probably obduino.ca (OBDuino has...
  19. Cool, thanks for sharing that Constantin, I did...

    Cool, thanks for sharing that Constantin, I did not know that type of device. I have used the REF19x series from Analog Devices in the past, but the part you propose seems to be a lot easier to work...
  20. This is indeed correct, this is exactly how we...

    This is indeed correct, this is exactly how we determine the input voltage. Although I believe it's not available as analog reference, so calling it a reference would be wrong. It's called the...
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    There was a hackaday post about a week ago that...

    There was a hackaday post about a week ago that used that library on a Teensy LC: hackaday - turning-a-teensy-into-a-u2f-key
    When searching for that I came across this post discussing the...
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    That library is full of AVR-specific assembly...

    That library is full of AVR-specific assembly code, that is not going to work on the Teensy 3 with it's ARM chip. I am not familiar with a library that runs on Teensy that provides the CBC ciphermode...
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    How large do you consider to be large? There is...

    How large do you consider to be large? There is something called the MTU, which is dependent on the hardware in the communication path. Packages larger than the MTU will be dropped, it is usually...
  24. Seems to work fine (no errors observed in the...

    Seems to work fine (no errors observed in the console window, behaviour is as expected) on Chromium Version 37.0.2062.120 Ubuntu 12.04 (281580) (64-bit).
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    I finally had some time to work on this again. I...

    I finally had some time to work on this again. I made several changes to the OBD9141 class I mentioned in my previous post. It now uses a begin() method, making it much easier to work with. I...
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    Definitely cool to know that such parts exist....

    Definitely cool to know that such parts exist. Whether those IC's are useful depends on your use-case I guess, I wanted to keep the complexity low (so without external components). You can probably...
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    Sure. Upon looking close at the code I realised I...

    Sure. Upon looking close at the code I realised I referenced the wrong source of the algorithm I used. The implementation I used was from http://code.google.com/p/curve25519-donna/. You can just...
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    My first thought was; don't use Matlab. But...

    My first thought was; don't use Matlab. But sometimes you just have to, I was required to use it at uni too. I still have it installed so I gave it a shot; The problem is apparently known;...
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    I started writing a reply for this, but figured...

    I started writing a reply for this, but figured out it would be better to make a separate topic on this as it is somewhat off-topic to storing private keys. Please read my post Experiences with...
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    Experiences with encryption on Teensy

    This post started as a reply to the forum post "Teensy as secure storage for private keys", and this remark posted by cr7pt0:
    I started typing a reply to this but then realized it would probably be...
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    In the Netherlands you can actually order on...

    In the Netherlands you can actually order on https://nl.farnell.com/, (the normal B2B site) but there are several conditions. You have to order above 50 EUR (ex VAT) and pay in advance through bank...
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    You reversed the voltage input. Check the wiring...

    You reversed the voltage input. Check the wiring on the breadboard, you connected the Teensy's ground to the red wire of the battery and the Teensy's plus to the ground. The wire colors are correct...
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    About a month ago I was experimenting with...

    About a month ago I was experimenting with reading data from an OBD-II bus, ISO 1941-2 to be precise. I have no experience with the chip you are using, but I can point out some alternatives, you have...
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    Paul, now that T3.2 is out of the door (great...

    Paul, now that T3.2 is out of the door (great update btw); I'm not sure whether you wanted the results of the beta test through the forum or via email, so I emailed you my results on the 8th, did...
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    You should try Paul's fork of Arduino-IRremote:...

    You should try Paul's fork of Arduino-IRremote: https://github.com/PaulStoffregen/Arduino-IRremote, the one you link probably doesn't support Teensy 3. (Edit: the download...
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    Check, I thought you meant the spark caused the...

    Check, I thought you meant the spark caused the noise. I tried it and can confirm that holding the Teensy to the housing and squeezing the lighter does indeed cause the occasional reset / program...
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    Tried it; works well, couldn't get the program...

    Tried it; works well, couldn't get the program mode to trigger with these components in place. I saw some very small dips on the oscilloscope, in the order of millivolts, I guess that's good enough....
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    Tried this; soldered a wire from 3v3 to the...

    Tried this; soldered a wire from 3v3 to the program pin, photo attached for detail:
    4957

    With this wire in place I tried getting the programming mode to trigger with the same test methodology;...
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    Okay, I wrongly believed the program pin was also...

    Okay, I wrongly believed the program pin was also connected to the larger chip on the Teensy LC and did not want to interfere with bootloader chip initiating programming mode. Mea culpa; it is not...
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    To get some information about the duration of the...

    To get some information about the duration of the pulses I hooked up my logic analyser today. The pulses are periodic, the first one is consistently around 5 microseconds, the second one around 7...
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    Wrapping the Teensy in RF shielding wouldn't help...

    Wrapping the Teensy in RF shielding wouldn't help much, as it is the wire attached to the program pin that's causing the problem. I'd have to shield the entire wire.

    I tried a low pass filter...
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    The problem isn't caused by back-emf from the...

    The problem isn't caused by back-emf from the relais. The Teensy that is being tested (in the bottom of the photograph) is not connected to the UPS or it's relays, as said in the post, a wire...
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    Teensy LC resets due to EMI?

    Hi all,

    My current project is about modifying an old uninterruptible power supply to something more useful; a portable power supply which charges from 12v and can provide 12v output for a while...
  44. Physically you can just make it point upwards......

    Physically you can just make it point upwards... I always solder them at the top side before I put female headers on my Teensies as placing the crystal is harder afterwards (didn't require an RTC...
  45. I was just thinking about designing this PCB when...

    I was just thinking about designing this PCB when I drove back home today. Looks like you beat me to it :D Looks great! I'm happy to hear the idea worked out well.
  46. I recently purchased a Teensy LC and performed...

    I recently purchased a Teensy LC and performed the analysis I have also done for the previous versions. Once again, credit for Manitou for figuring out how to do this on the Teensy LC (Your...
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    Back when Teensy 3.0 was released we had a...

    Back when Teensy 3.0 was released we had a discussion about a function which returns the amount of free memory: 23256-Get-Free-Memory-for-Teensy-3-0. Duff and I tried to create a function which did...
  48. The mockup is 2.2 by 0.7 inch, OSHPark has a flat...

    The mockup is 2.2 by 0.7 inch, OSHPark has a flat fee of 5$ per square inch, that gives you three boards. So somewhere in the order of: ((2.2 * 0.7) * 5$) / 3 = 2.56$ per board? Time will probably...
  49. I'm not going to comment on the last few pages,...

    I'm not going to comment on the last few pages, it has diverted quite a bit from the original topic. A few days ago I had an idea might make the bottom pins more easily accessible; OSHPark seems to...
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    Stevech, could you please be a little bit less...

    Stevech, could you please be a little bit less negative towards libraries - besides RadioHead - which deal with RFM69 radios?

    The datasheet for RFM69CW details quite a lot additional parameters...
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