Forum Rule: Always post complete source code & details to reproduce any issue!
Page 14 of 16 FirstFirst ... 4 12 13 14 15 16 LastLast
Results 326 to 350 of 382

Thread: Teensy APA102 POV Poi / Pixel Poi Build. Tutorial

  1. #326
    Senior Member
    Join Date
    Sep 2015
    Location
    Taiwan, Asai. (Traditional Chinese)
    Posts
    154
    Hi guys,
    I got a new score on refreshing rate.

    Click image for larger version. 

Name:	crazy.jpg 
Views:	60 
Size:	37.5 KB 
ID:	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 turns out that FPS depends highly on micro-SD cards, but not by size (as this one uses a 128Mbyte card, could be pretty old)

    I'm still finding if there is something deciding.

    other finding:
    when using apa102 chain over 80pixels, dont go over 12Mhz or the pixels chained faraway (>~80) goes crazy,
    my crazy leds happen on 16Mhz, by 144 LEDS only the far LEDS goes wild, but same script and hardware fine at 12Mhz.

  2. #327
    Junior Member
    Join Date
    Oct 2018
    Posts
    2
    Quote Originally Posted by InvisiBug View Post
    Hiya.
    I recently built a pair of these poi which turned out great here's some pictures

    Attachment 13106 Attachment 13107 Attachment 13108

    I have also rewritten the code generation webpage to create a demo of what the poi will look like allong with some ways to change certain things like the number of LEDs being used. I can upload my version of the webpage somewhere if there's enough interest bit it'll take a while as it's quite a bit of work to pull it out of my personal website.
    Attachment 13105

    I'm interested in porting the code to the ESP platform and will be happy to assist anyone else wanting to do the same.
    Also I was wondering what the lowest clock speed can be used and still generate the same effect, as the teensy 3.2 is quite expensive so i'd like to look at alternative controllers?
    Cheers
    Hi I would love to see your website. Can I see it please?

  3. #328
    Senior Member mortonkopf's Avatar
    Join Date
    Apr 2013
    Location
    London, uk
    Posts
    887
    @banya1987 this is the link to the website for that build:
    http://kavanet.co.uk/Pages/Projects/...bit/Orbit.html

  4. #329
    Junior Member
    Join Date
    Oct 2018
    Posts
    2
    Quote Originally Posted by mortonkopf View Post
    @banya1987 this is the link to the website for that build:
    http://kavanet.co.uk/Pages/Projects/...bit/Orbit.html
    Thank you very much <3 The link to download ino file on the website is not working atm can you send me the files please?

  5. #330
    Senior Member mortonkopf's Avatar
    Join Date
    Apr 2013
    Location
    London, uk
    Posts
    887
    @banya1987. I don't have any files for InvisiBug's project. Perhaps try a GitHub search or contacting the user via PM.

  6. #331
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    Hiya, I've just fixed the link. It should work now

  7. #332
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Hey guys!!

    I will make stuff for spining with two stripes of 72 leds on each side. (0,5m) the pictures will be 72 pixels high.

    I was unlucky and discovered this forum too late. I was not aware of teensy 3,6 existence .. so just today my teensy 3,2 came to me.

    How many simple images i can store on teensy 3.2? 256K flash. I would not like to buy teensy 3.6 if it is not necesary. I already bought Protrinket form adafruit and then i saw that Teensy is far better and i bought teensy 3.2, now i see that teensy 3.6 is better LOL i have many parts but nothing working.

    Thanks InvisiBug for converting tool lifesaver to me.

  8. #333
    Senior Member mortonkopf's Avatar
    Join Date
    Apr 2013
    Location
    London, uk
    Posts
    887
    there is some discussion on how many images users have been able to store. go to message #62 and #63 in this thread.

  9. #334
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Quote Originally Posted by mortonkopf View Post
    there is some discussion on how many images users have been able to store. go to message #62 and #63 in this thread.
    Thank you for fast response!

    4 images 72*72 on teensy 3.2

    ordering teensy 3.6

    i will put theese non used boards to use or make a donation to highschool electronic group

  10. #335
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    This might be a bit of a ramble, sorry in advance.

    So I first heard about this kind of poi through a company called "Light Toys". They have a very professional version of what we have been making in this thread.
    They've made some really great software to use with their "Visual Poi" which just so happens to include a load of demo images (Which have been specifically made to work really well with their poi).

    I mostly use these images when I'm spinning.

    Bit of a side note but I actually emailed the lead designer of the "Visual Poi" asking for some help. I sent him some long exposure pictures of me spinning for feedback and my poi were using his own images, oops. He was actually super cool about it and gave me a bunch of useful information.
    If you use the same images in your poi as I do you should be able to fit about 10 in one go.
    I'm actually working on a form of compression (Run Length Encoding) at the moment and nearly have it working. I'm fairly sure the Teensy 3.2 will be able to fit 30 images or more.

    I personally don't think a teensy 3.6 is worth the upgrade. I never find myself wanting more than a few images making the extra space of the 3.6 unnecessary.
    I've recently added a bunch of other functions using a single button to cycle through them (I'm currently working on a write up).

    Hope this helps (Sorry for the rambling)

  11. #336
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    i first saw this visual poi on OZORA psytrance festival 2 years ago. And i was woow i need to have this. Im also learning kungfu for 7 years and can spin the staff quite good.

    Thank you for the imput. Do you maby have somwhere those images for download?

    I already ordered teensy 3.6. It was 35 eur with shipping from germany. The whole cost of staff will be around ~200 eur. Quite expensive but i want to have good staff.

    I will instal 8.5 A of lion batterys. ( 2x https://www.nkon.nl/rechargeable/217...m-battery.html)

    For powering teensy i will use step up regulator to 5v.

    I will also install small lcd voltmeter so that you can alwas see how much juice is in battery.

    I want to use this code with remote. https://learn.adafruit.com/supernova-poi/code-1 I hope this also works on 3.6. My programing skils are low. I know what to look to modify the existing code but to write something new is big NO NO .

  12. #337
    Member
    Join Date
    Oct 2015
    Location
    Skopje Macedonia
    Posts
    26
    Quote Originally Posted by masterslave View Post
    Hey guys!!

    I will make stuff for spining with two stripes of 72 leds on each side. (0,5m) the pictures will be 72 pixels high.

    I was unlucky and discovered this forum too late. I was not aware of teensy 3,6 existence .. so just today my teensy 3,2 came to me.

    How many simple images i can store on teensy 3.2? 256K flash. I would not like to buy teensy 3.6 if it is not necesary. I already bought Protrinket form adafruit and then i saw that Teensy is far better and i bought teensy 3.2, now i see that teensy 3.6 is better LOL i have many parts but nothing working.

    Thanks InvisiBug for converting tool lifesaver to me.
    Teensy 3.2
    I using Output Height(number of leds on Poi) 72
    5x Output width(number of image slices) 150
    and have space for one more of 100 slice

    5x150 slice and one for 100 slice if i need
    good luck

  13. #338
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Quote Originally Posted by dzuljo View Post
    Teensy 3.2
    I using Output Height(number of leds on Poi) 72
    5x Output width(number of image slices) 150
    and have space for one more of 100 slice

    5x150 slice and one for 100 slice if i need
    good luck
    Thank you guys for your help. Im designing parts for my stuff. When assambeled and testet i will upload the 3d files so that everyone can use them .

    I have one important question... do i need access to Teensy 3.6 button? as i reed it is neaded to push it after uploading the code. ((( i hope there is some other way so that i can make teensy non removable.





  14. #339
    Senior Member
    Join Date
    Sep 2015
    Location
    Taiwan, Asai. (Traditional Chinese)
    Posts
    154
    @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 some other push button /location, so it's easier to access

  15. #340
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Ok, cool Po Ting😀. Do you guys use accelometer or gyro to get smooth POV? Like: https://neopoi.com/products/neostaff

  16. #341
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Parts are printed.. cant wait to assamble all togethrr https://photos.app.goo.gl/73mxhJGCnmzRTkP6

  17. #342
    Senior Member
    Join Date
    Sep 2015
    Location
    Taiwan, Asai. (Traditional Chinese)
    Posts
    154
    @masterslave

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

    not yet, I'm investing on my low-power radio pairing model with nrf radio, in fact just coding right now.

    I consider motion sensor a less needed feature in POV performance.
    Your pictures, moves and speed should be pre-defined, and heavy practiced so you don't make mistakes.
    so your speed should not include big ranges, no need to worry about stretch.

    also POV effects actually work fine in a range of speed

    with a gyro it is probably very easy to achieve image stablizer with little codes.
    https://www.youtube.com/watch?v=XcuS0mnEDPw

    stretch stablizer needs more computing and probably DMA with SPI/I2C to catch up data in time without disturbing your image.

  18. #343
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Quote Originally Posted by Po Ting View Post
    @masterslave

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

    also POV effects actually work fine in a range of speed

    with a gyro it is probably very easy to achieve image stablizer with little codes.
    I found them after half year of searching 😀.. not so easy to find even if you know what you are searching. But they have affordable and cool looking products. Except battery packs are so weak.. best models have around 2.4 ah.. My shaft will have 8.4 ah. I like to go to psytrance events and spin for whole night 🤣. Also i will have 288 leds.. 15A peak consumption at peak brightness.. but i know it is not good to use at full bright becouse i go blind 😂🤣

    Thank you for calming me down. I cant wait to assamble it this week.. and try how it looks. I also ordered gyro and accelometer chips. 0.99 gbp/pcs for future modifications. Sadly i still have to learn a lot how to implement gyro as image stabilisation.



    https://www.ebay.co.uk/itm/1-2-5-10P...-/153030528330

  19. #344
    Senior Member
    Join Date
    Sep 2015
    Location
    Taiwan, Asai. (Traditional Chinese)
    Posts
    154
    Quote Originally Posted by masterslave View Post
    I found them after half year of searching ��.. not so easy to find even if you know what you are searching. But they have affordable and cool looking products. Except battery packs are so weak.. best models have around 2.4 ah.. My shaft will have 8.4 ah. I like to go to psytrance events and spin for whole night ��. Also i will have 288 leds.. 15A peak consumption at peak brightness.. but i know it is not good to use at full bright becouse i go blind ����
    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 parts on my own designed PCB, so I had to avoid tricky IC packages
    QFN or apa102-1515 is by far the hardest I can handle, with paste and hot air/plate.

    Really had some tough time with those chips, when you're not sure is if your code's error or hardware's corrupted.

    but ofcourse you can have fun playing and prototyping with modules
    Last edited by Po Ting; 12-24-2018 at 08:36 AM. Reason: tough**

  20. #345
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    I will use adafruit code that uses IR rwmote for brightnes, sampling speed and pattren selection

  21. #346
    Junior Member
    Join Date
    Nov 2018
    Posts
    14
    Quote Originally Posted by masterslave View Post
    I will use adafruit code that uses IR rwmote for brightnes, sampling speed and pattren selection
    Partly assambeled stuff

    https://imgur.com/a/Wl5y1OQ

    Im very happy with results.

    Now soldering begins and wiring. THAN trying the program.

  22. #347
    Junior Member
    Join Date
    Jan 2019
    Posts
    1
    Ridiculously n00b question here: Why is it that I seem to need a level shifter driving my POV poi APA102 LEDs with a Teensy 3.6 whereas I don't need one with a Teensy 3.2? Thanks!

  23. #348
    Senior Member
    Join Date
    Sep 2015
    Location
    Taiwan, Asai. (Traditional Chinese)
    Posts
    154
    Quote Originally Posted by outofscope View Post
    Ridiculously n00b question here: Why is it that I seem to need a level shifter driving my POV poi APA102 LEDs with a Teensy 3.6 whereas I don't need one with a Teensy 3.2? Thanks!
    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 level-related error by direct driving apa102 with T3.6 SPI pin signals. ( and they both powered directly by 4.2V Lith
    ium battery)
    also by solder error you can possible short higher voltage to SPI pins and burn your T3.6, that happened to me once.

    -----
    another usage: if there is a CS pin on your level-shifter, it is also better when you also use the SPI port for other use.
    since apa102 does not have CS, it may flash randomly if you use the same SPI port to use, for example, a SDcard.
    it need some 32 bits of "0" for apa102 to take next line, this random flash will not always happen.
    Last edited by Po Ting; 01-16-2019 at 01:02 PM. Reason: -----under

  24. #349
    Junior Member
    Join Date
    Feb 2019
    Posts
    3

    What's the best guide to Follow for my first Pixel Poi Build?

    Hello folks, just starting to read through this thread, some really great projects, thanks for sharing!

    I'm wondering what would everyone recommend as a build guide for a first time Pixel POI build?
    The InvisiBug Orbit build guide? Or??
    What is the current recommended type of material to use, for attaching the LED strips to? (If I use the APA102 144/LED's /m Strips) where do you purchase?

    Thanks for any input! Looking forward to gathering up the supplies and attempting to build a pair of Pixel Poi sticks.

  25. #350
    Junior Member
    Join Date
    Feb 2019
    Posts
    3
    Looks like it's difficult to purchase authentic APA102C 5050 144/m strips these days, unless you pay $50 + tax + shipping to Adafruit.
    Anyone have a less expensive online source for the legit APA102C 5050 144/m LED strips? Don't want to end up with a under performing counterfeit roll.
    How about the SK8922 based strips? Is anyone using these? Will they work okay for this type of POI project?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •