Baldrick8 RTR pixel limits

Each of the 8 outputs can control 750 pixels. The number that you can directly power depends on the brightness setting of them and also the type of pixel. It also depends on the power supply choice. A 12V 500W supply can theoretically power about 800 12V "regulator" pixels at 100% brightness. Or it can power about 1600-2500 12V "resistor" pixels at 100% brightness. Seed pixels it's probably 4000+ at 100% brightness. Dropping to 50% brightness doubles the numbers. The scale is fairly linear with the global brightness. 5V pixel nodes it's probably something 1000 at 100% brightness from a 5V 200W supply. 5V seeds it's probably also up around the 4000 or so at 100% brightness.
Theoretical and actual are different as when the voltage drops along the cable the current reduces. This varies depending on regulator, resistor or 5V pixels.
 
They are rated for 24V.
I thought 12V bullets were inefficient :jawdrop:
 
just comparing at the moment before making a purchase, watching greg macaree videos. i just really like the idea of less power injection.
 
AAH said:
They are rated for 24V.
I thought 12V bullets were inefficient :jawdrop:
Click to expand...
At risk of oversimplifying... the relative efficiency (as a fraction of volts presented that are in turn presented to LEDs (of an average of 3V forward voltage), and not counting for inefficiencies in the PSU or the LEDs conversion of electricity into light, and not counting power used by the chip, which can turn out to matter more).

12V Series Designs (GS, WS2808, etc.): 75%
5V (WS2811 etc.) 60%
24V (Based on 12V Series + Resistor) 37%
12V Resistor/Regulator (WS2811) 25%

So, it could be better or worse, depending on what 12V bullet design you're comparing to...
 
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