External 5V supply for SBC Raspberry Pi 4 and Duet 3 Mini 5+
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I am confused by the jumper diagrams for the 5V SBC jumpers.
I have a 24V to USBC power supply for the raspberry pi 4, as the documents say the Duet 3 may not have enough power.
My supply should be sufficient to power both the Pi and the Mini.Can I power the Duet 3 Mini from the Pi via USBC on the Pi and the 26 pin ribbon between them?
If so, what jumper settings should I use? One says 5V ext, the other says 5V SBC.Alternately, I can use the internal Duet 3 Mini power, and power the Pi with the USBC on the pi.
In this scenario which jumpers to use? I'm thinking no jumpers installed, but I am confused.The section on powering the SBC says there are 4 ways to go, but there are 3 diagrams and no linkage between the 4 ways described and the diagrams.
Perhaps a diagram with wiring and jumper examples is called for here.
Help is appreciated.
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Can I power the Duet 3 Mini from the Pi via USBC on the Pi and the 26 pin ribbon between them?
Yes, you can power the Mini 5+ 5V from the Raspberry Pi; put a jumper between '5V_SBC' and '5V_COM' on the 5V SELECT pins, and put another jumper on 'Internal 5V disable' (I've added this to the Mini 5+ documentation here ). This can power the logic side of the Duet, but that can't supply power for motor drivers and heaters.
Alternately, I can use the internal Duet 3 Mini power, and power the Pi with the USBC on the pi.
That should be fine. Powering the Mini 5+ and RPi separately is what we generally recommend.
The section on powering the SBC says there are 4 ways to go, but there are 3 diagrams...
I think you looking at the Duet 3 6HC documentation here? This is similar to the options the Mini 5+ has, ie internal 5V, external 5V, and 5V from SBC, though the 6HC (v1.02 and later) doesn't have an 'Int_5V_Disable' jumper. The fourth option is 5V power by USB, which is the same as the Mini 5+.
Ian
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@droftarts Thanks, I'm running it with the onboard power for the Duet3 and separate 5V power to the Pi. Running with NO jumpers, which I think is correct. Does this sound like the correct combo?
