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    Thanks, hope you have progress on your work too!...

    Thanks, hope you have progress on your work too!
    at first I've think ROM at chop is not enough so I focus on using a SD, very well established library, and seek on ROM chip but not successful
    its...
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    Hi, My code attachment on #3 should work, please...

    Hi, My code attachment on #3 should work, please give it a try
    I no longer use the TLC5947 or TLC59711 driver in my later version of POV.
    but the library and code should work, you may look into it...
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    Hello, Happy new year community :) I have did...

    Hello, Happy new year community :)

    I have did another build of POV ( is this still POV anyway? lol) for a drum.
    featuring Teensy LC and 4m (1m*4) of apa102(60pixel per meter) in parallel of...
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    Hello, following also, had anyone successfully...

    Hello, following also,

    had anyone successfully tested MTP on teensy 4.0?

    Thanks
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    I use some of a elapsed microseconds and use...

    I use some of a elapsed microseconds and use other things to do that,
    and check if time is favored or not before FastLED.show(), or DMAshow(), whatever draws the LED
    this part of my


    unsigned...
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    @Janezek I suggest using octows2812 library,...

    @Janezek

    I suggest using octows2812 library, available at PJRC website libraries
    which splices your LED chain into 8 parallel chains and uses DMA for maxima speed

    but you'll need more setup on...
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    @abrownmn : did you meet any problem using with...

    @abrownmn : did you meet any problem using with the hardwares?

    Not sure if cap/resistors matter,
    I did add a 47uF between my power battery
    teensy have enough cap on the board
    and apa102 were...
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    Sorry to interrupt, sharing my work on POV :) ...

    Sorry to interrupt, sharing my work on POV :)

    Here's my latest POV, 36 pixels with Teensy LC setup, surely it should run well with Teensy 3.6 I think? I'll do that later in JULY.
    I've completed...
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    @abrownmn : freezing sounds like a power supply...

    @abrownmn : freezing sounds like a power supply bug,
    if you have your image squeezed, you can adjust settings yourself for a good effect.
    I recommend at a speed that repeats letters "ABCD..." less...
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    Hello, Its been nine months,I've completed adding...

    Hello, Its been nine months,I've completed adding on nrf24 module into my POV and achieved wireless synchronize,
    and also a easy version as a hand LED-stick.
    I can also recommend nRF24 module for...
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    apa102c and apa102 (or sk9812 from China clone) ...

    apa102c and apa102 (or sk9812 from China clone)
    those use SPI wires are probably all usable with FASTLED library with apa102 setup,
    if you were looking for a source, I know the origin company...
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    Hello, did you make it well? Now I have...

    Hello, did you make it well?

    Now I have trouble using nrf24 with SD card on the same SPI port of LC :\
    So looking around if anyone meet this problem too.
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    hello, checking in here. Sorry for reviving,...

    hello, checking in here.
    Sorry for reviving, just thinking about the same thing :
    the libraries were hard-coded to SPI0 and need work to use in SPI1

    in my case I probably will be fine to use SD...
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    glad it worked, switch your line from...

    glad it worked,

    switch your line from
    FastLED.addLeds<APA102, data, clock, BGR >(currentLED, totalLEDs);
    to
    FastLED.addLeds<APA102, data, clock, BGR, DATA_RATE_MHZ(8)>(currentLED, totalLEDs);...
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    Where did you went wrong, does it compile? or...

    Where did you went wrong, does it compile?
    or just not showing intended picture at all?
    you have a working example so the hardware should be fine I guess,

    however your example from adafruit...
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    @Paul Thanks I didn't notice the 6-bit / 12-bit...

    @Paul
    Thanks I didn't notice the 6-bit / 12-bit DAC were different modules.
    I first see the comparator used as wake up source in snooze library, and can use some DAC reference voltage to compare.
    ...
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    Hello, not sure if this question related, I...

    Hello, not sure if this question related,

    I see DAC could be used as a comparator source from datasheet.

    though DAC cannot use AREF as a reference,
    can DAC work as an analog reference,...
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    Not sure if 2020 strips were available yet but I...

    Not sure if 2020 strips were available yet but I did source mine here. Last year they seems to be on tesing and not widely available.
    You can also find details of Fritzing apa102 LEDS on this post
    ...
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    my LC&nrf works fine with direct power from 3.3V...

    my LC&nrf works fine with direct power from 3.3V on LC and pin 8,9 as CE/CSN, 11,12,13 as SPIs, 15 as IRQ.

    I first thought it was related to capacitors , but not all cases?

    my code first didn't...
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    Hi guys, I recently just met some problem with...

    Hi guys, I recently just met some problem with that related,

    from my experience the nrf module could not run faster than 8Mhz,
    I once had a uno run at 24Mhz, that divides to 12Mhz to SPI I guess?...
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    @sschiesser I think something key was written...

    @sschiesser

    I think something key was written in the MTP library, but the library is relative simple to edit
    guess you can probably modify somewhere in...
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    it is safer and stabler as they work on different...

    it is safer and stabler as they work on different voltage by datasheet.

    If you don't shift the level, you have to take your own risk that they don't work as intended
    By far I didn't meet any...
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    if you had extra buttons or time to work on, you...

    if you had extra buttons or time to work on, you can make the brightness adjustable after programmed. I use such settings to swap between daylight and night.

    I plan to solder all the possible...
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    @masterslave wow, there are so many new pixel...

    @masterslave

    wow, there are so many new pixel shops today :\
    guess thanks to widely available pixel strips, and the maker culture.

    not yet,:p:p I'm investing on my low-power radio pairing...
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    @masterslav if your program is not needed to...

    @masterslav

    if your program is not needed to upload for your user, you don't need to leave the button reachable

    otherwise,
    you can line the program pin from the board out to ground through...
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    @embedded-creations thanks for the link! It's...

    @embedded-creations

    thanks for the link! It's useful for anyone would make their own POV

    I use my own board for many reasons,
    preferred density/count and size,
    there is also special designed...
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    @gfvalvo Did, but not deep As I never used any...

    @gfvalvo
    Did, but not deep
    As I never used any RF module before
    I don't understand which mode/state does it refers to (power down/standby?), and if it fits my requirements
    I don't recognize...
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    Thanks for suggestions guys, I just ordered some...

    Thanks for suggestions guys, I just ordered some of nrf24 modules.
    Since my project is a battery project without a hard-wired switch.
    Mainly my questions falls on a module's quiescent currency or...
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    Looking for a start on choosing RF module

    Hello community,

    I'm looking forward to add Radio controll / synchronize to my teensy LED project.
    I am totally new to RF module and used none before
    just did some search and read some data with...
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    Both SD/Sdfat library from teensyduino is already...

    Both SD/Sdfat library from teensyduino is already usable with T3.5/3.6's onboard SD with SDIO features,

    You can just use any example with the CS pin set to BUILTIN_SDCARD
    as...
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    Hi guys, I got a new score on refreshing rate. ...

    Hi guys,
    I got a new score on refreshing rate.

    14634
    this doge.bmp is a 24bit bmp with a width of 80 pixel and gets a horrible 3900 FPS, that squeezes the image
    okay, when it goes to DMASPI it...
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    @gerhards congrads, your first proj is POV with...

    @gerhards
    congrads, your first proj is POV with apa102-2020, and even with IR controll, cool, I think 144 LEDS might be too much for some cards,
    also you'd might need to find a faster card for...
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    I just compiled it with my Arduino 1.85 newest...

    I just compiled it with my Arduino 1.85 newest build and its compile-able .

    It is a less_featured version back in 2016_MARCH. Calling it "corrupted" might be wrong as its only less_featured with...
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    Hello community, I've rearranged some of my...

    Hello community,
    I've rearranged some of my script (of DMASPI) so it can compile with latest Arduino 1.8.5 and Teensyduino 1.42
    I am not good at making library, so I made them into examples,
    This...
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    What a mistake. Just out of curiosity about...

    What a mistake.

    Just out of curiosity about how fast is pure-SPI can do,
    and found that with SPI but not DMASPI it has ~1520FPS @192Mhz
    turns out that I forgot to set the clock of my DMASPI so...
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    Hi guys, I've completed my POV project with...

    Hi guys,
    I've completed my POV project with apa102-2020, 80HD

    Here's are details to find,
    https://forum.pjrc.com/threads/53088-Venti-POV-v2-0-80HD

    142111421214213
    142141421514216
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    I remember there is some POV stick project that...

    I remember there is some POV stick project that uses arduino mega with a I2C LED display and buttons for picture choosing,
    found the link here, http://www.instructables.com/id/Arduino-Pixel-Stick/ ...
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    Some extras

    Here are some more about how I setup the details of a perform-project.
    14209
    the red circles are pictures that tooked photo at comments above,
    mostly with ~1/4 shuttle, aperture of 8.0 , and a...
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    Some more photos

    14196"tree by dawn" some picture actually need to be adjusted on PC, for gamma correction
    14197 a "bmp" with "settingB.txt" to show the "page" you're in
    14198 colorful runes
    14199 14200
    this two...
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    Hardwares

    141891. prepare LEDs
    141902. Stencil and apply solder paste
    141913. put those tiny LEDs with tweezers
    141924. cook them!
    5. clean up excess solder and all short/bridges

    Due to the expensive of...
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    Schematics & code diagram:

    14184 schematics like mentioned at features above, see the hand-writing.

    Specific pins used in features:
    Battery power measuring : A4(set as gnd), A5(analog Reader) : using internal reference,...
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    [queued] Venti-POV v2.0 80HD

    Venti-POV 2.0 80HD

    14179pikachu 14183Sonic the hedgehog

    Introduction: (for short: Persistence Of Vision Poi with Teensy 3.6)
    Venti-POV 80HD is a design teensy 3.6, used in flow arts, e.g....
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    @Howsthewater Hi Matt, there's a video link at...

    @Howsthewater
    Hi Matt,
    there's a video link at the end of #308,
    the 2020 LEDs with 80-chained, 's already light-able!
    I'm still working hard on the system,
    since drawing 80 LED need much speed,...
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    13795 this is the closest shot my phone could...

    13795
    this is the closest shot my phone could reach.
    the data is pushed from the 4 pads (designed the same with the strips) all the way up.
    sorry the board is dirty :(
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    okay, finish busying my previous version of work...

    okay, finish busying
    my previous version of work is on floor #252 , its half year since.

    heres my latest apa102 PCB holder board (of 2020, and 5050)
    13793
    the density is by far the most...
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    yes, it follows the same usage with apa102...

    yes, it follows the same usage with apa102 strips,
    by the phrase "Persistence Of Vision" , any LED or light-reflecting object that seen by human eyes is suitable to the subject.
    but their effect...
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    @InvisiBug nice jobs, my suggestions: 1. you...

    @InvisiBug
    nice jobs, my suggestions:
    1. you can design a easy PCB that connects the strip, charger ,teensy together with plenty of extra pads for battery wire.
    saves up time for air-wiring and...
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    I couldn't figure out what is thread when this...

    I couldn't figure out what is thread when this post first released,

    @tonton81 nice clear example,

    can I also ask some noob question?
    is it work as like the two threads(red marks) running...
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    I did try something that goes to mtpd.loop()...

    I did try something that goes to mtpd.loop() forever if USB connection is detected, or else do other main codes and never do mtpd.loop().
    but not yet sure if it can shut down after connected?...
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    you should count the total height also, the width...

    you should count the total height also, the width is 72 as you have 72 LEDs

    T3.6 assume you have 800KBytes flash rom left after program, with 24 bit image(3 bytes per pixel),
    you can have 800,000...
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