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Sadly, our art car was destroyed on its way back from the playa this year when a drunk driver rear-ended our trailer at over 100mph. So this was its last ride. But thank you to PJRC, Teensy, OctoWS2811 and all the support over the years. It was a good run.

Back in 2014 I started a thread about my Burning Man project and claimed that I'd post pictures of the project, but never ever did, and now the thread is closed for reasons. But anyway, Teensy and OctoWS2811 have been serving us well for 10 years (as well as my shitty C++ code running on...

Ok -- make one mistake. We toasted one Teensy last night, and replaced it with another Teensy 3.1 / OctoWS2811 pair. But i realized after i connected it that i had forgotten to cut the VUSB/VIN trace. The other 2 Teensys have this trace cut, as we're powering them from the LED power supplies...

Everything is working properly and we have packed for Burning Man. Can't wait to share photos with you and a writeup of our development log. It's been a hectic build, but Teensy / OctoWS2811 have been indispensable, as have the great forum response. We are running WAY under budget for the 7200...

Oh, one final question. The OctoWS2811 library page says this: A strip of 60 LEDs can draw about 3 amps of current. Each strip should have its own connection directly to the power supply, using #22 or larger wire to avoid loss of voltage. Power can travel through about 2 meters of LED strip. If...

Thanks. Yeah, it's been far more complicated than our rig last year that just used 5050's and all we had to do was hook them up to 12V

All strips now work. Tested the voltages at each teensy pin, and was getting reasonable values (around 1volt), so i knew none of the teensy's were defective. Tested +V at the connections to LEDs and those were all 5V. Tested the data lines at those connections, some were 0. It turns out that my...

Yup, cut VIN/VUSB. I think i found my major problem -- i was running the strips directly to +V on the power supply, but didn't connect the strips to -V on the supply, just to the ground on Teensy. Rookie mistake. Now 80% of my strips work -- i think i just have bad connections to work out.

No, they are powered by LED power supply.

So just to be clear -- like this: Thanks for the help. And yes, i will post pictures when things are up and running.

I am driving 24 5m 60 LED/m strips with 3 Teensy 3.1 / OctoWS2811, based off the VideoDisplay sample, with pixel data streamed from an external USB source and one Teensy being the master and driving framesync to the other two. I am powering the Teensy boards via the +5V power supplies used for...

Ok. I'm going to Best Buy and i'm just picking one that seems "expensive enough." Hopefully i make the right choice. I cut the traces on the underside of the Teensy's so i am driving them with the LED power. We have 8 power supplies so power's not an issue. I mean, other than the crazy amount...

Also, this is what the project looked like last year: http://i.kinja-img.com/gawker-media/image/upload/18zcuzoslchgljpg.jpg

I am using Serial.readBytes(), basically the VideoDisplay sample Teensy-side. I'm looking for a good Multi-TT hub. Do you have any recommendations? It's super difficult to find out whether they are Single or Multi-TT from the product specs. Also, i'm assuming i should be looking for an...

Thanks. I will give the Beaglebone a try. It seems reasonable to drive ~7200 LED off of 3 Teensy 3.1's though, right? Thanks, --matt

I do not have a beaglebone Black. I ran a simple test: $ dd if=/dev/zero of=/dev/ttyACM0 bs=14403 count=60 60+0 records in 60+0 records out 864180 bytes (864 kB) copied, 1.75088 s, 494 kB/s That seems really slow to me.

Update: If i open the file descriptor with O_WRONLY | O_NONBLOCK, i get speeds more consistent with what i would expect, but the write() calls only report sending a fraction (about 2k) of the full 14kB payload i'm sending to each Teensy, and i have no LEDs lit on my strips. MOAR UPDATE: if i...

Hi there! I'm reworking the lighting rig for our Burning Man art car. Last year we used 5050's, this year we have upgraded to individually addressable WS2811's. I am using 3 Teensy 3.1's to drive 24 5m strips. I am using something very similar to the VideoDisplay example, where the Teensy's are...