11-12-2017 02:02 AM - last edited on 03-06-2024 07:30 PM by ROGBot
11-19-2017 01:30 PM
11-19-2017 01:55 PM
11-19-2017 02:07 PM
11-26-2017 07:08 AM
11-26-2017 09:31 AM
KeksimusMaximus wrote:Didn't check the video but it seems the guy needed an external power supply via the psu to power the strip. Don't know if it is mandatory though for 120 leds ? I know the header provides just 5v but if i remember well they cranked up the amps.
Update, you can bypass the limitation of 60 WS2812B LEDs on a single strip but you hit another hardcoded limit at 128 LEDs
11-26-2017 10:57 AM
namoi wrote:
Didn't check the video but it seems the guy needed an external power supply via the psu to power the strip. Don't know if it is mandatory though for 120 leds ? I know the header provides just 5v but if i remember well they cranked up the amps.
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11-27-2017 12:28 AM
KeksimusMaximus wrote:Thanks for you insight.
Each led draws max 60mA of current, Asus Hero X header has limit of 3A therfore it can drive only 50 RGB. Yes, i routed power directly from PSU and its strongly recommended for 120 RGB leds as they will draw a massive 7.2A of current. That amount pushed through the tiny goldpin if not melt it at least will significantly increase the temperature around.
The RGB strp itself barely handles such large current as after ~3 meter of strip the voltage drop reaches 0.5V (from 5V to 4.5V ). Maybe its just the lenght of strip i had, if your LEDs will be placed more dense on the strip the voltage drop between each LED will be smaller. But thats not a problem itself, as WS2812B are meant to operate even at 3.5V.
So you use power directly from PSU (molex, sata, separate modular cable) to not melt your motherboard.
11-27-2017 12:39 AM
namoi wrote:
Thanks for you insight.
So on the header itself you keep only the data wire and plug the 5v and ground wires directly to the psu?
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