Those figures are the maximum working range (without damage) figures. Page 4 has the VIL and VIH figures although they seem to be somewhat screwed up. I think they mean VIL (logic 0) is 1V max and VIH (logic 1) is 4V min ? Maybe there's a more complete data sheet out there.Does anyone know if the signalling on GS8208 needs to be close to the 12v supply?
The specification sheet seems to indicate that it does :
On Page 3 - Input Logic Voltage SDI -0.5～VDH+0.5 (where VDH is 12v)
Hmm they worked first time for me on Falcon - just wired in the power, ground and 1 data line.. sorry I can't be more specific I am traveling away from my pixels at the moment.I'm having trouble getting my GS2808 pixels to work. I've tried them on a Falcon, Alphapix, and Joshua with no luck. 2811 pixels work fine on all of these, but not 8208. What is the string type and Kbps setting you use on a ECG-P12R?
So this puts 3 single-color LEDs in series, and uses constant current drivers, thus allowing single pixels at 12v. That's a very interesting option and a new design.Next was power consumption measurements, with the entire 5M roll (150 LEDs), powered via both ends connected to a 12V Lab Power Supply. I've done this test with Ws2811 too and other lights so I can formulate PSU estimates.
View attachment 12789
Now WTF is going on here! Notice how single R/G/B measurements are off the charts compared to 2811. Mixing colours, which on 2811 would traditionally increase current makes very little difference, Infact mixing colours reduces consumption! I don't believe this is voltage drop related, powering from one end was only marginally lower draw. What probably is at play is the internal series-wiring of the R,G,B, LED elements and their PWM drive circuitry.
Feeding 12V to each LED too won't be helping either - but it's a price to pay compared to dealing the hassle of 5V based voltage drop over longer distances. In reality, it'll mean higher average power draw compared to 2811, just not higher total/peak power draw. This may be a surprise factor for some people upgrading if their cabling gauge wasn't up to spec to begin with.
I have a string of them here that I hope to get tested beside a matching string of 5V and 12V 2811 nodes. I have finally finished a couple of jobs so I expect I'll get the testing done in the next few days.Has anyone tried those nodes as mentioned in Alan's last post?
I'm about to place my first ever order of bullets, and for me, it's either these or the WS2811.
I should clarify that I used an ESP01 module directly, wired to a 3.3V regulator & pin2 going straight to the data line on pixels. I was not level-shifting the pin2 output back to 5V either.Which version of the ESPixelStick hardware did you test with?