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  1. In another thread, someone was asking about a...

    In another thread, someone was asking about a circuit activated by a vibration sensor but kept energized for the duration of a timer.

    I wonder if it would make sense to only power the teensy after...
  2. Since you mentioned a 555, it's pretty easy to...

    Since you mentioned a 555, it's pretty easy to add some resistors and capacitors to make a timer. Check out monostable mode.

    http://www.555-timer-circuits.com/operating-modes.html

    You can also...
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    Very cool! Thanks for sharing this. This would be...

    Very cool! Thanks for sharing this. This would be great for the PJRC projects page.
  4. Here's what the verbose info from the Loader...

    Here's what the verbose info from the Loader says:

    18:39:24.365 (ports 2): Begin, version=1.46-beta1018:39:24.965 (ports 2): add device: subsys=usb, type=usb_device,...
  5. Here's an example of how the Teensy Loader...

    Here's an example of how the Teensy Loader application looks on Raspberry Pi W over VNC on Beta 10 and the previous release:

    16209
    It redraws reasonably quickly after I press the program button...
  6. Please post the complete sketch. Otherwise, we're...

    Please post the complete sketch. Otherwise, we're guessing.
  7. Kurt, I needed to install many packages to make...

    Kurt, I needed to install many packages to make vncserver work.

    Agreed that this platform is too slow to use for a desktop. My aim here is to help troubleshoot the bugs. Eventually, the RPi may...
  8. By came up blank, I mean the window appeared, but...

    By came up blank, I mean the window appeared, but it was all white. I'll post pictures later. Looks like the window isn't drawing for some of the exposure events. Pressing the program button on the...
  9. Installed...

    Installed https://www.pjrc.com/teensy/td_145/TeensyduinoInstall.linuxarm as the pi user because I installed Arduino 1.8.8 as the pi user
    Verified the HelloSerialMonitor example sketch
    Note: verbose...
  10. Was able to recreate the F_CPU error with a...

    Was able to recreate the F_CPU error with a Teensy 3.2 plugged in and after invoking Get Board Info. The key was to run it again from a new user account. So there's definitely an initial state bug of...
  11. The F_CPU issue appears to be a first-time thing....

    The F_CPU issue appears to be a first-time thing. I haven't been able to recreate it since plugging in a Teensy. To recap, I think there's an issue trying to build Teensy firmware without a Teensy...
  12. Success, though somewhat rough. Thanks for...

    Success, though somewhat rough. Thanks for responding, Defragster.

    The boards.txt is unmodified from the installation. See attached.

    Attaching a Teensy 3.0 allows me to get farther. Tools > Get...
  13. Verbose compiler messages: Arduino: 1.8.8...

    Verbose compiler messages:

    Arduino: 1.8.8 (Linux), TD: 1.45, Board: "Teensy 3.2 / 3.1, Serial"

    /home/pi/arduino-1.8.8/arduino-builder -dump-prefs -logger=machine -hardware...
  14. Using a Raspberry Pi Zero W to program a Teensy 3.1/3.2

    I have a couple of lighting installations that are physically inconvenient to update. I never did manage to port the Teensy CLI loader to OpenWrt Linux for the host commanding the Teensy. Figured...
  15. Good for you for solving it and reporting back!...

    Good for you for solving it and reporting back! Looking forward to pictures or videos. :-)
  16. Have you calculated the current draw of the LED...

    Have you calculated the current draw of the LED strip? 120 RGB LEDs can draw quite a lot more than the typical 5v phone charger supplies.
  17. The FastLED library is good. There are many demos...

    The FastLED library is good. There are many demos that generate patterns and the library is very well supported. Whether you decide to replay predefined patterns, reuse existing demo coffee, or write...
  18. "well nigh impossible to manipulate" How...

    "well nigh impossible to manipulate"

    How sophisticated is the adversary? Can they manipulate voltage and temperature? Can they use standard failure analysis tool used by chip makers?
  19. Hardware random number generators are...

    Hardware random number generators are surprisingly difficult. The testing is necessarily statistical. Proving that your noise source isn't susceptible to bias from other activity in the chip and in...
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    I've seen spikes like this. I'd suggest...

    I've seen spikes like this.

    I'd suggest explicitly clamping the range and discarding any values that are outrageously large. Also, median filtering is very useful for smoothing out the signal.
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    Sounds good! Would DMA be useful?

    Sounds good! Would DMA be useful?
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    Seems like a good idea. It's not like there are...

    Seems like a good idea. It's not like there are security issues. Someone can continue to use an old version if they need to. It's not bad to give customers who are mostly hobbyists a little push to...
  23. I'd try running it under strace. Might give a...

    I'd try running it under strace. Might give a clue about where it's dying.
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    A second Teensy would allow you to avoid...

    A second Teensy would allow you to avoid 'impossible' programming. Just plug in the one you want to use.
  25. I don't see you setting the input more of any of...

    I don't see you setting the input more of any of the pins. You might need to configure the inputs to use pull down resistors so they don't float and give occasional wrong values.
  26. The big selling point for RISC-V is that it's...

    The big selling point for RISC-V is that it's open source. If the PJRC variant were not entirely open, that would make it less interesting.

    The world would be a safer place if there were more...
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    Probably the easiest way is to combine them and...

    Probably the easiest way is to combine them and add a new definition for the setup function that runs one or the other based on your choice.
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    Yup. Our layout guy recreated the layout (but...

    Yup. Our layout guy recreated the layout (but with smaller pin headers) so that if the on board Teensy recreation didn't work, others could still get work done by soldering a real Teensy 3.2 to the...
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    I used to work for a company that reflowed Teensy...

    I used to work for a company that reflowed Teensy 3.2 boards onto their custom PCBs. They were able to make it work but with caveats:



    Typical PCB manufacturers will not guarantee this to work...
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    Welcome, Eric! Here's a simple project that...

    Welcome, Eric!

    Here's a simple project that lights up some LEDs.

    Somethings to note: LEDs can easily draw more current than a Teensy can safely supply. It's up to you to make an appropriate...
  31. I'm rooting for you, Dustin. The troubles you're...

    I'm rooting for you, Dustin. The troubles you're encountering sound familiar. If I had solved them, I would have posted.
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    Try searching for LED Lighting Drivers at your...

    Try searching for LED Lighting Drivers at your favorite electronics distributor's website. Mouser has thousands of choices in this category.
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    As you've discovered, the sun is very bright. One...

    As you've discovered, the sun is very bright. One car battery won't supply enough current to light your display for long at levels required to compete with direct sunlight.

    You might want to look...
  34. I built an Amateur Radio Repeater Monitor. It...

    I built an Amateur Radio Repeater Monitor. It transmitted battery voltage over the air in Morse code. It was configured by a command line interface or by a built-in iambic keyer.

    See...
  35. There was a FastLED bug a while back that had...

    There was a FastLED bug a while back that had this symptom. It was a bad interaction between USB and SPI. You might try upgrading to the latest FastLED. If that doesn't fix it, the FastLED community...
  36. First, welcome, GoatGuy. I hope you find this a...

    First, welcome, GoatGuy. I hope you find this a friendly interesting community.

    Now, on to the subject you raised. Code formatting and style has been discussed to death on the net and at many...
  37. I don't think it's recommended to set the...

    I don't think it's recommended to set the touchRead pins modes. If you don't set the mode, the I/O functionality will remain in its default disabled state. touchRead() uses different circuitry.
    ...
  38. Sticky: Pots, noise, and op amps:...

    Pots, noise, and op amps:
    https://forum.pjrc.com/threads/49954-LM4040-external-reference-with-Teensy-3-2
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    Yes, but if you care about the data transmission...

    Yes, but if you care about the data transmission rate you probably want to use something other than a solar panel, such as a photodiode or photo-multiplier tube.

    Try searching the web. Data...
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    I've got a few Teensy 3.2s connected to WiFi...

    I've got a few Teensy 3.2s connected to WiFi routers in station mode running OpenWrt. Most of the routers are MIPS processors. I've tried porting the CLI loader to download hex files, but haven't...
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    Lucky you? I have had issues driving APA102s from...

    Lucky you? I have had issues driving APA102s from 3.3V on T3.2. Adding a level shifter fixed it. Maybe your power supply was better. Who knows?

    Considering that this is an automotive applications,...
  42. If you need to measure capacitance to read the...

    If you need to measure capacitance to read the key states, the Teensy touchRead() function may be useful. Lots of options there if you dig into the implementation. For example, search for...
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    To drive the APA102s, yes, you need a level...

    To drive the APA102s, yes, you need a level shifter to get from the 3.3V Teensy to the 5V APA102 LEDs. It's tempting to try to do without because it almost works, it's usually not a good use of time...
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    You haven't shown us the vb.net part of the code....

    You haven't shown us the vb.net part of the code. It's possible the bug is there.

    The Teensy code spends a fair bit of time in delay(). It would be more responsive if it were rewritten to use...
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    Try asking in the Xilinx forums. Also, you might...

    Try asking in the Xilinx forums. Also, you might find PicoBlaze useful. It is an 8-bit microcontroller that you can run in the Xilinx FPGA. Maybe you'll find it easier/quicker than VHDL or Verilog.
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    I'm sure you meant debouncing encoders, but I...

    I'm sure you meant debouncing encoders, but I like the idea of denouncing bad encoders. :rolleyes:
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    It's possible to send and receive data over USB...

    It's possible to send and receive data over USB with a Teensy 2.0 (and all the other models).

    Can you say more about what you mean by "vending data"? If you tell us what problem you're trying to...
  48. Often the most important question is: how quickly...

    Often the most important question is: how quickly can you produce working code. The libraries that run on the Teensies are pretty amazing. The support here is astonishingly great.

    If it comes down...
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    Aside from having relatively small amounts of...

    Aside from having relatively small amounts of RAM, C++ and C on the Teensy are both pretty normal.

    I'm a fan of arrays of function pointers or objects for state machines. In addition to being...
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    The Teensies don't use processors that are...

    The Teensies don't use processors that are capable of being exploited by these bugs. If you search Arm's website, you can find a list of the affected processors.
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