Unsolved mini5 schematic
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Is there a schematic posted somewhere? I searched around here and did not find one.
I did a 'basic' set up for my coreXY and everything worked great first try! Now I am pushing a bit beyond and running into infinite frustration. I think I can figure this all out on my own with a schematic. I can't see where all the pcb traces go so I'm left guessing.
I tried to hook up dht22 following many supposedly successful examples on forum using spi.cs0 which is says does not exist even though clearly listed in many places, e.g. https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Duet_3_Mini_5_pin_names
So then I tried cs1 which at least exists but then got error that I need both in and out for this sensor which only has 1 data pin. So I threw that in the trash and moved on to the next problem.I want to hook up my led strip which I thought would be simple. But it says there is not enough juice from internal 5V to drive it. I'm only using 24V and 3.3V for everything else. So I need to hook an external 5V supply to board. I read the 5V section multiple times but it is just not clear to me. It says I need set the jumper to select 5V source but there is no jumper on that header at all. It is floating? I don't see any extra jumpers in the box. If this is supposed to use a simple 2 pin jumper then the labels are confusing. The middle pin doesn't look like it goes anywhere from the wiring chart. Am I supposed to use a flexible jumper to connect the 5V_ext to some other pin to drive that supply bus? So I gave up on that too.
Next I hooked up my 12864 display to the headers on the board. That's when I noticed that EXP1 header uses 5V_ext, which is dark. However, the display actually powered up! So I guess the 5V_ext power bus is connected to the internal regulator even though the jumper is missing? So now I'm thinking that everywhere that says 5V_ext should instead say 5V_com? A schematic would surely clear all this up quickly.
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Thanks. That GitHub link is helpful. Unfortunately I was not yet able to figure out the failure on the spi.cs1.
But the 5V supply options make more sense now. I still find the INT and EXT labels confusing since they are coming off a common source and one of those sources can be EXT_IN (no relation). But at least I can follow the supplies now.
BTW, the wiring diagram is wrong and labels the center jumper 5V_COM when it is actually 5V_SEL (though it is silk screened correctly on board). With the diode protection is it required to disable the internal regulator if pulling in alternate 5V supply because the FB gain will conflict? -
@jltx as per thois post https://forum.duet3d.com/post/229692 on the Duet 3 Mini5+ you need to connect the DHT22 signal pin to both the IN and OUT pins of an I/O connector, not to a spi.cs pin.
