Henrik Carlsson's Blog

All things me.

posted this note on and tagged it with Attention

I’m hoping that turning this switch to “off” in Overcast will decrease the amount of mindless listening and get me to make more conscious choices about when to listen and to what.

(Also I love any excuse to use my Pencil.)

posted this note on and tagged it with Rethinking my tech 2019

Part of rethinking the tech I use to get work done is also getting rid of Dropbox. From now on, personal documents that need cloud sync goes into iCloud Drive and work stuff goes in OneDrive.

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Rethinking my work tech – Part 1: My backpack

posted this note on and tagged it with Getting work done iPad for work Rethinking my tech 2019

This was originally planned to be a post about me trying out a new tech setup for getting work done, but as I kept on writing I realized that it would need to be broken up into multiple parts, so this is more of a prolog.

My backpack (Nerdy Log Lady for scale)

This is my backpack. (Nerdy Log Lady for scale.)

It’s not fancy or elegant but I like it. A lot.

Mostly I like it because it contains all the things I use to get my work done. Most importantly it contains my computer and its various peripherals.

When it comes to getting my work done, a real computer has always been my tool of choice and for as long as I’ve had my current job, that computer has been a MacBook Pro.

I also like my computer. A lot. It’s the last of its kind, really. It is the 2015 15″ Retina MacBook Pro model that was sold up until last summer, which was when I bought this one. It’s the tool that I use for most of the things involved in my job. I do carry a physical notebook and a pen quite often and use it to scribble down my thoughts but it is the computer that is the main work machine.

Pen and notebook

There are other things in the backpack that help me get my work done. In fact, I have a thirty-eight (38) items long checklist in OmniFocus for the things that should ideally be in the backpack. The notebook and pen I just mentioned are two of the items on the list. A charger for the computer is another one. There’s also an external hard drive, adapters for Thunderbolt to Ethernet, Thunderbolt to FireWire 800, a FireWire 800 cable(!), a FireWire 800 to 400 adapter(!?!?), Mini DisplayPort to VGA, Mini DisplayPort to HDMI, an Ethernet cable, all kinds of USB cables, a PowerBank and adapters for camera and microphone mounts. Oh, and an umbrella and various non-prescription medications.

Some of the clutter that I carry around on a daily basis.

(Just some of the stuff is actually in the picture.)

And that’s just the basic configuration of it. Some days I might carry another external hard drive, or maybe a iPad Air. And most days I carry my lunchbox in it as well.

In many ways this is a really good setup. The bag is heavy, but most days I sling it on one shoulder for the twenty steps walk to the car, dump it in the passenger seat next to me where it rests while I drop the kids off at preschool and then drive to work. Arriving at work I take a similar twenty to forty steps walk with the backpack on my back before arriving at my office and dumping it on the floor where it will rest until I walk back to the car and drive home.

The computer is also heavy, but it lives its life mostly either docked to an external display and keyboard and trackpad at my office at work, in a similar arrangement at my home office, or in the backpack being transported between work and home.

This setup is also good for travel, because as long as I have the backpack with me I have everything that I might need to get work done with me. There’s nothing1 that I need to do that I can’t get done.

However, or but,

This setup is also really bad for travel because it’s heavy and, even worse, bulky. It takes up a lot of space in the car. That’s not a problem when commuting to work but when I actually travel somewhere by car it’s often with the family and that always means there are a ton of stuff being packed already. My backpack just adds insult to injury, and for all kind of travel that’s not commuting, it is always just one of my bags. I’ll always need to bring at least one more bag for clothes and toiletries.

Heavy and bulky is also applicable to the computer unfortunately, which is why it is not a solution to get a smaller bag and pack less stuff in it, as long as the computer is part of the stuff being packed. If the computer should be brought, the backpack in question is the best way to bring it because even though it’s heavy and bulky it sits nicely on my back.

But maybe there’s different way to do this…

iPad Mini, Pencil and external keyboard

  1. Almost true. There are off course some special cases that requires that studio at work, or where I need to provide a student with a certain kind of equipment that is only available at work. 
posted this note on and tagged it with The Kid's Music Player ΠiFi Music Player

I made a slight mistake in a previous post. There needs to be two lines in the terminal to play from Spotify:

And yes, things are progressing nicely now.

posted this note on and tagged it with The Kid's Music Player ΠiFi Music Player

Apparently it’s more or less impossible to install additional software on an instance of Pi MusicBox, so I’ll try to get Mopidy working on a ”vanilla” Raspian Lite instead.

More progress on the music player for the kids

posted this note on and tagged it with The Kid's Music Player ΠiFi Music Player

Slightly simplified the music player for the kids has two jobs:

  1. Scan for QR codes using the camera and identify the ones that contains a Spotify URI (using zbarcam) and
  2. send that URI to the MPD that plays the music from Spotify.

At the moment I am able to set up separate tests for the two jobs and both works, on there own. The problem is that I’m currently not able to set up MPD with Spotify and the zbar tools at the same time. It seems to have something to do with different operating systems and/or other kinds of conflicting requirements that I need to lock into.

For the tests right now, I use standard Raspbian plus zbar for bullet point number one and Pi MusicBox for point number two.

For my own memories sake, this is the very simple (and probably quite brittle) shell script that I’m using for bullet point 1:

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posted this note on and tagged it with The Kid's Music Player ΠiFi Music Player

I’m making progress on the music player for my kids. Using Pi MusicBox on the Pi, I can control playback using mpc on my Mac.

A music player for the kids

posted this note on and tagged it with The Kid's Music Player ΠiFi Music Player

My kids, Iris and Ebbe, are four and a half, and two years old respectively. Both of them loves to listen to music and dance. Compared to when I was a kid they have access to tremendous amounts of music. If I wanted to listen to a song as a child, I had to have it on a cassette or later in life a cd. Today’s kids have access to ”all the world’s music” in Spotify, Apple Music or similar.1

The problem with the modern world in this regard is that a cassette deck and a box of cassettes is much more kid friendly than a smart device like a phone or tablet with Spotify and possibly also a smart speaker connected via bluetooth, AirPlay or a Chromecast.

Spotify has a nice solution for this in there Spotify Codes. It wouldn’t be to hard to make a whole box of cards, one for each album and/or playlist that the kids want, and teach them how to scan the cards with Spotify. The problem is that it requires them to use their iPad (or my phone, or their mother’s phone).

Why is that a problem? Because if they use the iPad they will undoubtable be sidetracked by YouTube or something similar. Sometimes having them watching videos is great. I’m certain that the reason Iris know quite a few words in English, despite being a Swede with Swedish parents, is that she’s watched a lot of English videos on YouTube. But sometimes I want them to just listen to music and not having to have a discussion about why they are allowed to use the iPad but not the apps they want.

So I’ve started toying with the idea of building them a music player that works as simple or simpler than Spotify Codes but that is a dedicated hardware device, a Raspberry Pi. The plan is for it to use either QR codes or NFC tags to control what is being played, so that way the kids can have a box of cards with artwork, similar to the box of cassettes that I had as a kid.

I think it will work.

Right now I’m going to test various setups for it and document my progress here on the blog, under the tag The Kid’s Music Player.

Some links to similar projects


  1. Yes, I am being Captain Obvious here, I know. 

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posted this note on and tagged it with True Detective

🎞 Watched: True Detective – The Great War and Modern Memory (S3E01)

Season 2 of True Detective was a massive drop in quality compared to season 1 however based on the first episode it seems like season three is a return to form.

posted this note on and tagged it with Porrfritt

Vilken censurtjänst från ett kommersiellt it-företag ska Dalarnas kommuner köpa in för att särskilja filmen Fifty shades of grey från ett BDSM-klipp på Pornhub?

Antiliberalt censurkrav från Liberala kvinnor Dalarna – Evelyn Schreiber

Bra ledarartikel om hur feltänkt det blir när moralismen ska få styra vad vi får se på internet.