OctoSW2811 Teensy 3.0 and Bluetooth

JY-MCU07 bluetooth module

As an update to the scrolling tex project, we now have bluetooth control over the text. I have been working with the btinterface app on android. This is free app, and has the capacity to set up buttons to trigger specific events, but also has a terminal that allows text to be input. I have put a description of how to do it and where to find the app, and some code over on the […]

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scrolling text colour

In a previous post I showed you the code for getting the Octows2811 library to display scrolling text. That code just had a basic colour set into it to get the thing working as a basic test. If you want to control the colour of the text that is being used you can easily change it. Once you implement a small additional piece of code, you can use whatever colour you want. To do this, […]

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graphic poi /pixel poi code

Using the Teensy 2.0 with the 6803 leds is a little bit outdated now, with led strips being available at decent densities. But I thought that I would post some code up as this is still useful as a concept for using programme space, getting values, and structuring methods. update is posted on the graphic poi page mortonkopf

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Graphic Poi Update

Theres an update on the “how to build your Graphic Poi (pixel Poi)” to discuss library setup. And a picture of the different LED approaches available. Here is an image of a visual comparison between making a row of LEDs for the POV from a set of single individually addressable LEDS, and next to it a strip of individually addressable LEDs that are now available to buy. So much less weight and a little bit […]

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Graphic Poi (LED Poi) using LPD6803 leds and Teensy

End point = a set of LED poi with 30 RGB LEDs on two sides to draw graphics by POV. About two years ago I started working with a juggler / performance artist friend. We were talking one evening about how to do something a little special to tie in to his LED show. Now, the LED show was already very special and getting plenty of attention, so we had to do something pretty dynamic […]

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OctoWS2811 and fade

So, playing around with the Teensy 3.0 and using the OctoWS2811 library, I wanted to be able to play some patterns across the eight strips. I wanted to be able to use some gentle fading patterns, but was finding it difficult to get enough granularity to make the fade a gentle one when using a length of 34 leds, meaning, graduated to extent that there were no sharp changes visible. The fade seemed just fine […]

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more OctoWS2811 and scrolling text

As promised, here is the code for getting the characters entered as text in the sketch, having the sketch look these up in the alphabet array, grab the hex values and the push these onto the array in the first column. The array then copies and moves this first column by one place and adds in the next column of values. ////Start of message setup//// char msg[] = “Hi, this is a test for OctoWS2811. […]

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more on OctoWS2811 and scrolling text

So, the set up is that the strips are 34 pixels long, and plugged into the Teensy 3 as per Pauls instructions: http://www.pjrc.com/teensy/td_libs_OctoWS2811.html I am running the whole thing off of four rechargeable AA batteries, as it is going to be a mobile scrolling display (on a top hat probably). I have used a 2D array for calling the location of the pixel as i could not find a way to ‘objectify’ the pixels using counters. […]

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OctoWS2811 + Teensy 3 + scrolling text

So, having been doing a bit of work with Teensy and LEDs for a performance artist friend, I saw Paul’s work on getting the WS2811 LEDs working through DMA. I thought that I would have a play with his OctoWS2811 library and wanted to produce some scrolling text for a festival I’m going to later in the year. I found plenty of scrolling text examples, but very little for using WS2811, so I finally managed […]

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