[Bjonnh.net]# _

The Akai MPC One is a nice device, but it is a pain to backup if you have to get the SDCard out everytime. Using the SSH mod discovered by TheKikGen, it is easy to connect over ssh and get whatever you need.

On using 3d printer screens and controllers for your own projects.

I bought some of those cheap 3d printer controllers on the big evil site for $12: BigTreeTech Mini 12864. There are other similar ones in the same price range from other brands, but I can’t guarantee they have the same pinouts and controllers. Also these came with a tiny yellow rubber duck, always useful when you try to make sense of schematics.

The thing is, these are made for 3d printers so they expect you to plug them directly and not worry about implementation details.

Fun thing is, for some printer models, you need to make an adapter cable as nobody seemed to have settled on a standard for those and pinouts are all over the place.

To save you from the hassle of figuring out how to use those with an Arduino or an ESP, and likely for me later when I will need that again, I decided to write down all I discovered about them.

I finally put my hands on a Trinket M0 for the Trackpoint. Meaning, no more ugly driver.

A friend of mine Pierre Grangé-Praderas needed to make a webpage with graphs. So I decided to play with Cytoscape and Hugo and see if I could integrate them together.

I spent a day adding a trackPoint to my keyboard to avoid having to move all the time to the trackball. I wanted something that would allow me to quickly jump from one window to another while keeping my hands on the keyboard.

When using docker in LXD/LXC, the FS performance is really really bad.

I needed to run Docker in LXC containers on my Ubuntu servers.

I’m moving all my old file-based ssh and gpg keys to a YubiKey 4 hardware key. This post will get updated with a few notes along that migration. It also covers how to use pass and pass-tomb with these. And then I fell down the rabbit hole of using those keys everywhere…

[Draft published as is, this is old.] I am playing with Pulsar and Heron in Kotlin. And I was always struggling with getting my kotlin project packaged properly. Here is a walk-through.

I was complaining on IRC about someone sending me a screenshot as a word file. Then my friend Aaron Lav had a comment that I turned into that project.

We had this conference in Chicago in 2016. As I was playing with the laser-cutter and making planetary motion devices see Here, I also was playing with the idea of circular slide rulers. As the calculation of elution volumes and retention in CCC and CPC are using multiplications and divisions it is possible to do these on a circular slide ruler (or a normal one) by using logarithmic scales (because additions in that space correspond to multiplications in linear scale).

We had [this conference](https://gfp.people.uic.edu/ccc2016/) in Chicago in 2016. As I was playing with the laser-cutter and making planetary motion devices, Guido asked if it wouldn't be possible to make two awards for the conference. I also made a [Slide ruler](/article/20170530_cccslider) for that conference. A bit of design, metallic-gold acrylic, flexible metallic with black background acrylic for the tag, and a piece of wood made by a colleague (Jim). I also found that simple M3 or M4 (can’t remember) screws with thin thread will lock perfectly two pieces of acrylic (with a hole cut slightly below the diameter of the screw).