144/m full brightness temperature?
I have these two strips of 172 WS2812B which will be required to run at full white for extended periods of time. Power is coming in at both ends with the V rail cut mid-way.
Right now they are so hot I can’t even let my finger on them for more than a few seconds. That doesn’t bother me since they will be mounted on aluminum rails, but is it normal?
Mericana sales9@uniqueentech.com, we have these strips, do you need more information?
Yes, they get hot. Make sure you’re not driving them past 20mA (per pixel)
Yep thats normal. Don’t run them at full power, just because you CAN does not mean you should. Make sure you COOL them properly or they WILL pop.
@Ashley_M_Kirchner_No Can you please explain to me what is a difference between 20mA (per pixel) and 60 mA(per pixel). because I thought 60 mA is always as full brightness no matter what.
I might be wrong, but Ash may mean setting the RGB value to 1/3 of maximum eg. if white at full max is 255,255,255 then 1/3 is 85,85,85. That is still damn bright!
@Leon_Yuhanov this is helpful resource check https://learn.adafruit.com/battery-power-for-led-pixels-and-strips/estimating-running-time out.
@Leon_Yuhanov I will mount them on aluminum rails using thermal tape, hopefully this should act as a heatsink. Do you know if there is a temperature rating I could measure to make sure I don’t go beyond a certain limit? My fingers are sensitive but not that precise I’m afraid.
@Franck_Marcotte Not sure, according to https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf the absolute maximum range is -20 to +80C. My sugestion to you is not to run it at full power no matter how good your cooling and power delivery.
Alright, thanks a lot for the tips!
Actually, I was referring to 20mA per color, 60mA for the pixel. However, even at 1/3 the power PER PIXEL, they’re still pretty damn bright, specially at that density.
Curious how the temperature would feel if you ran with a master brightness of something like 180? Seems like it should still give you plenty of brightness, but maybe the temp wouldn’t be as worrisome.
