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  1. OK 128, no worries. Suppose you allow the pair...

    OK 128, no worries. Suppose you allow the pair R1A and R1B to be not quite equal anymore. In fact, suppose they're the two legs of a potentiometer, and the ADC node is the wiper (close to the...
  2. Good, you got it. Now think, what causes that...

    Good, you got it. Now think, what causes that little offset? How might you fix it?
  3. Good catch, hadn't had my coffee! So you did...

    Good catch, hadn't had my coffee! So you did check my math, awesome ;^)

    I edited #4.

    Not sure how to draw a readable picture in here, the editor mangles ascii graphics. Let's try a cell phone...
  4. Hi 128- Rather than jumping straight into op...

    Hi 128-

    Rather than jumping straight into op amps, why not start with your requirements and work up to what you need?

    Sounds like you want to match a range of 12V (24V total span) to the...
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    Very nice idea! Although I wonder if "economic"...

    Very nice idea! Although I wonder if "economic" is quite the right word... maybe "serene?"

    (BTW the blinking is also much less obtrusive since you folks helped me speed up the pulses, thanks for...
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    Thanks Paul, that indeed did the trick, in...

    Thanks Paul, that indeed did the trick, in particular this line


    CORE_PIN14_CONFIG = PORT_PCR_MUX(1); // no slew rate limit

    after the pinMode() declaration. Doing this, I get nice 10ns pulses...
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    digitalWriteFast() unexpected behavior

    Greetings-

    I'd like to toggle a pin a bit faster than the ~ 2 MHz I get with successive digitalWrite() calls in a for() loop, to get a specific-length
    burst out quickly.

    I stumbled on the...
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    'minimal' Nixie tube clock

    Here's a very simple clock display idea, if you already have a surplus digital counter. I like Nixie tube counters, like this HP5216A. It has a "totalize" function where it just counts input...
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    These fonts do look amazing on my scope, it's...

    These fonts do look amazing on my scope, it's incredible how Hershey digitized them in such extraordinary detail. That said, I can't see much of practical utility beyond the few Greek and math...
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    Teensyduino 1.40 Arduino 1.8.2

    Teensyduino 1.40
    Arduino 1.8.2
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    Magnificent, thank you neurofun!! (In the...

    Magnificent, thank you neurofun!!

    (In the meantime I whipped up a comparable script in Matlab, but that will be useless to most readers here.)

    Re: application at hand, many of the characters...
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    waveform.phase() error for some waveforms

    Trying to output quadrature test waveforms, I found that waveform.phase(90) produces the correct result for sine and square waveforms but incorrectly
    renders a 45 degree phase shift for triangle and...
  13. Thread: Display_ili9341

    by zike
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    Forgive awakening an old post, but seems best to...

    Forgive awakening an old post, but seems best to keep everything on this topic where it can be found, even if it's beating a long-dead horse.

    I just got a couple of these TJCTM24028-SPI displays...
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    EDIT: demo video (https://youtu.be/DjsQzPSOPbU)...

    EDIT: demo video is now up for preview. Comments/suggestions welcome.
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    The simplex font library, from Paul Bourke's site...

    The simplex font library, from Paul Bourke's site. I'd be interested if anyone
    could help me translate the higher codes, particularly math symbols and greek letters, into similar format; the...
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    Finally got round to this, very good results on a...

    Finally got round to this, very good results on a 3.5. I put a demo here on YouTube. Nothing
    but the Teensy and a couple scope probes into a Tek 2213A (60 MHz analog, 14 kV PDA; ca. 1985 or so). ...
  17. Force integer-sample periods for "clean" audio test signals

    Maybe this has been covered, pretty basic stuff, but in case it helps someone:

    My "Oscilloscope Music" player toy delivers various CW audio test waveforms from the audio library...
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    [posted] "Oscilloscope Music" player

    As a fan of Teensy and the amazing engineer/artist/composer Jeroboam Fenderson, and also a collector of antique oscilloscopes, I was inspired (compelled?) to build this simple stereo player / scope...
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    Vector draw examples/libs using T3.5/3.6 DAC ?

    Just wondering if anyone has worked out an application like this

    https://www.nycresistor.com/2012/09/03/vector-display/

    using the built-in DAC hardware on the 3.5 or 3.6. I'm sneaking up on a...
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    Thanks, much appreciated; this post did come up...

    Thanks, much appreciated; this post did come up in my searches, but the context was not clear. What is a K66? Is
    the "beta test" title indicating that this function is not yet officially...
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    Newb here, can anyone offer a link showing how to...

    Newb here, can anyone offer a link showing how to call the hardware RNG in the 3.5 and 3.6?
    Depending on speed I'd either default to it or just use it once to seed rand() by srand().

    Tx,
    mike
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    Thanks Paul! It remains unclear why the board...

    Thanks Paul!

    It remains unclear why the board was initially invisible to IDA and teensy.app (irrespective of serial). Only explanation I can think of is an intermittent cable, or perhaps
    more...
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    teensy 3.5 fails to be recognized as usb device

    RESOLVED (tx)

    MacBook Pro, OSX 10.11.6, Arduino IDE 1.8.2, teensyduino 1.3.6 (installed today);

    Hi-

    New to this product/forum, just received my 3.5 today and uploaded Teensyduino.app as...
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