UMO: Make my own ulticontroller?

[coofercat 3]

I'm wondering if I could make my own Ulticontroller or similar? There are a couple of connections to the electronics, and then of course the firmware would need to know about my creation, but maybe I could make it Ulticontroller or Reprap Discount Controller (or other) compatible...?

 

I'm looking at maybe making a cut-down sort of ulticontroller - the aim being to just have head movement and extruder controls (I don't need the SD card stuff). I could just go for a super-cheap controller and use that (although I'm not sure about how great any of them really are for this stuff)?

 

I'm guessing these controllers connect with SPI or I2C - anyone know if the protocol is described anywhere?

[Anthrix 18]

So as i understand you want to use oled display? an make your Ulticontroller for it.

just get all ready unit from like aliexpress less hassle and easy also cheap, make sure your board have i2c to control it.

[coofercat 3]

I'm leaning towards just buying something in - what I really want is a physical button to extrude, which when you let go stops extruding (and the same for retract, move x/y/z etc). I don't really need a display - I mostly use Octoprint for that.

 

But you're right, some of the cheap controllers are about £10, although without a case, so I'd have to print one for it.