RGB LED SK6812 vs Mini?

[Chriss]

@stephen6309 No change unfortunately.

[Stephen6309]

@chriss On my Mini and 6HC I used a separate 5vdc power supply. The mini may not have enough power to power them.

[Stephen6309]

@chriss The Mini needs an external 5vdc to power the neopixel.
https://docs.duet3d.com/en/User_manual/Connecting_hardware/IO_Neopixel_DotStar

[Chriss]

@stephen6309

My understanding is that the Mini5+ can deliver 3A. I guess that this would be enough for one neopixel I'm playing with at the moment...

[dc42]

@chriss said in RGB LED SK6812 vs Mini?:

My understanding is that the Mini5+ can deliver 3A. I guess that this would be enough for one neopixel I'm playing with at the moment...

The Mini5+ is limited to 1A total from the 5V rail including the internal current draw.

From https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mini_5+_Hardware_Overview#description-of-connections:

This is to connect and power NeoPixel LED strips (DotStar LED strips are not supported) . Connect the DO pin to Neopixel DI. External 5V must be supplied to the "EXT 5V" header to power the NeoPixel array, they cannot be powered from the onboard regulator.

[Chriss]

@dc42

Got it.. I had the hope that I can drive 3 tiny LEDs without a external source... well well....

[dc42]

@chriss if it's just 3 LEDs then you could pick up +5V from one of the IO connectors and feed it into the 5V_EXT input.

[Chriss]

@dc42 said in RGB LED SK6812 vs Mini?:

@chriss if it's just 3 LEDs then you could pick up +5V from one of the IO connectors and feed it into the 5V_EXT input.

Ahhhhhh... that's a very, very good idea... I need to check for a free 5V pin on the IO ports..... I guess that I need to feed GND too.

[dc42]

@chriss no, just the 5V. The GND on the Neopixel connector will be sufficient.

[Chriss]

@dc42 Thanks!