ohararp

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  • in reply to: 24-Output Cape in LEDscape #1061

    ohararp
    Keymaster

    John, thanks for all your inquiries. Hopefully, I can answer all your questions. We are working on a “branch” that covers the remapping of the different capes we have been designing. Depending on the format it was necessary to remap some of the pins to ensure proper digital signal integrity and to simplify routing. You can find the branch at the link below. This new branch is one step closer to having a html based json configuration. Think the same setup page as a wifi router.

    https://github.com/Yona-Appletree/LEDscape/tree/pru-program-generation

    Part of this configuration will allow you to set the number of channels (0-48) and number of pixels (0-512). Additionally, you can also specify the version of the pin mapping that you need. As part of this we are also now supporting WS2801 leds.

    For your example, say you had 64 leds per strip. To write to the first led in strip 7. You would be writing to the memory location 448 (7*64+1=448). I hope that helps.

    in reply to: Controlling more than 64 leds with Fadecandy #1015

    ohararp
    Keymaster

    Chris, unfortunately the Fadecandy only supports 64 leds per channel. An arduino or our Beaglebone Black capes would be able to support the 16×16.

    in reply to: A decent LED control library #792

    ohararp
    Keymaster

    TC, the OPC stuff is mainly used as an interface to the LEDscape main code. With the latest version of LEDscape you now get temporal dithering and interpolation, that really makes the leds much “smoother” and less harsh to look at. rgb-test would be good example of running a visualization natively on the BBB.

    I don’t think we have really harnessed the power of the AM335x yet for visualizations. I know Yona, has some Javascript stuff to allow visualizations to be run off a browser and uses the BBB to handle the server side of things in additions to the visualization. Using this setup allows for interaction using a tablet through a wifi router tied to the BBB.

    For audio, how are you handling the audio input into the BBB? The current installation 48×48 I have up and running is for a customer, who was interested in using a bluetooth receiver for audio, wherby the BBB would react to the analog audio.

    Binary clocks. Ooh nice. I have been wanting to put together a 16×16 Word Clock (like this – http://www.timeanddate.com/wordclock/) for awhile, but have been tied up with hardware manufacture and production and haven’t had time.

    in reply to: A decent LED control library #788

    ohararp
    Keymaster

    TC, right now we have been relying on outside application (Processing/Javascript/etc) to generate visuals. These really do not leverage the core of the BBB. Being able to run the visuals natively is something that is definitely lacking. I have some upcoming collaborations that may help with this, but they are a bit of a ways off. I think leveraging the Neopixel and Neomatrix libraries is defeinitely the way to go, while also marrying it up with the LEDscape architecture. Supporting multiple outputs is a must IMHO.

    With that said, mapping the LEDs is another area of work that could aid in this. Yona is also about to push interpolation and temporal dithering (think Fadecandy) for the LEDscape code. This will make for great improvements in pixel transition for visualizations.

    in reply to: Connectors for Fadecandy / power supply? #779

    ohararp
    Keymaster

    Got your email. Just sent a response!

    in reply to: Connectors for Fadecandy / power supply? #765

    ohararp
    Keymaster

    Charles, I shipped your items this morning. I added a some extra power cables and connectors. I also threw in a 120VAC power cable. I also included a female header to make it easy to mate to the 32×16.

    The Fc pinouts are all the same (RGB-123 and Adafruit) and they exactly match the header of the 32×16. The Examples here – https://github.com/scanlime/fadecandy/tree/master/examples/processing should get you up and running with minimal effort.

    I am working on a video to show how easy it is to get everything hooked up.

    in reply to: Which connectors? #752

    ohararp
    Keymaster

    Pat, we are working on stocking these for sale. In the meantime, I found these

    http://www.ledlightinghut.com/3-pin-jst-sm-female-male-connector.html
    http://www.ebay.com/itm/JST-2-5-SM-3-Pin-Battery-Connector-Plug-with-Wire-x-10-sets-/111317446619

    3-wire servo cable for RC planes/cars
    https://www.sparkfun.com/products/9187

    • This reply was modified 3 years, 9 months ago by  ohararp.
    in reply to: More 3D printable Goodness #637

    ohararp
    Keymaster

    You can pull the stl off the link in the post. The stl is there on Thingiverse for you to download.

    in reply to: Getting started with 8x16x4 panels #631

    ohararp
    Keymaster

    Lee, I just put together about 35 of these capes for a customer and have 8 or so left. I haven’t put them on the site, but they breakout 24 connections for panels from the Beaglebone. I’d recommend using something like this for all the reasons you mentioned.

    The cape has 5V logic buffers as well that further isolate your BBB and allow the WS2812 signals to be used with about 10 feet of wire. Let me know if you are interested!

    Beaglebone Black 24 output 5V Cape

    • This reply was modified 3 years, 10 months ago by  ohararp.
    • This reply was modified 3 years, 10 months ago by  ohararp.
    in reply to: PixelPusher #630

    ohararp
    Keymaster

    Pb, I actually have a PixelPusher unit here. They have stated that the code should work with the WS2812 leds, but I cannot confirm as of yet. I found the unit and lack of documentation to not be very helpful. I was going to pursue this more, but the great Ledscape code with 48 outputs on the Beaglebone Black pulled me off away from this controller.

    in reply to: Mounting multiple panels together #629

    ohararp
    Keymaster

    Lee, Microrax has been designed to work with the RGB-123 panels. They have the best profiles and brackets you can find. I highly recommend them!

    • This reply was modified 3 years, 10 months ago by  ohararp.
    • This reply was modified 3 years, 10 months ago by  ohararp.
    in reply to: More 3D printable Goodness #608

    ohararp
    Keymaster

    JD seriously this picture is sic! Taking images of these panels is incredibly difficult, but you really knocked it out of the park! Great work!

    in reply to: Killed my 8×8 by using the high current wires for power input #594

    ohararp
    Keymaster

    Andi, quick debug. What happens when you apply power and put the signal input on the second led, bypassing the first? Either way, I can replace the 8×8 if you want to ship it back. It’d be good to have the unit available for testing on what went wrong. Ryan

    in reply to: 3dprintable Case for RGB123 Matrices #582

    ohararp
    Keymaster

    I like it. I am supposed to be receiving my Form1 later this month. I am itching to print this out. Keep up the great work!

    in reply to: STM32F4 Discovery Board #570

    ohararp
    Keymaster

    Andi, I have found that code that works for the WS2811, rarely works with the WS2812B which has a tighter timing spec. It appears the library you reference is setup for the WS2811. I hope that helps.

    It looks like this might work http://eliaselectronics.com/driving-a-ws2812-rgb-led-with-an-stm32/ and was found using google: “STM32F4 WS2812”

Viewing 15 posts - 1 through 15 (of 40 total)