Personal on Gustav Ernberg von Heijne

Boom in da Box 3.0 - Black Box Edition

Mon, 08 Apr 2024 17:45:43 +0000

This boom box survived for a much longer period of time than the Boom in da box – v1.0 and Chill out box 2011. It was alive and kicking between 2012-2019

Created from sturdy 13mm plywood paired with 6x9" JBL speakers this thing was a beast, design inspired by the black boxes in airplanes for some reason. Total operational weight: 20-30kg depending on battery :-)

During the years it survived some abuse and a couple of incidents and only needed minor repairs (like a new battery

Boom in da box 2.0 - Chill out box

Fri, 01 Mar 2024 22:39:52 +0000

Cleaning out old hard drives can mean that sometimes you come across old treasures.

Back in 2011, for the music festival Peace and Love I wanted to bring my trusty home built “boom-in-da-box” (see previous post). However, the rules for the festival camping stated that no lead-acid batteries were allowed into the area and the “boom-in-da-box” ran on a car battery + 600W car-amplifier.

To fix this I needed two things:

More energy efficient 12V amplifier.
Smaller speakers.
A box to build in.

I opted to build the speaker inside of an empty wine box, a “chill out” boom box was born. It lasted the festival, but mono-sound and the hassle of AA’s meant this box eventually died.

Boom in da box 1.0

Sun, 07 Jan 2024 22:10:00 +0000

Below is a first version of the boom in the box, anno 2011.

It was built to play music outdoors, engineered to be cheap and loud (and with surprisingly high quality if you didn’t max out the poor old Volvo V40 car speakers from 1998).

This box was active for about 1-2 years and repaired a few times after it had had too much dancing ( it fell of bikes more than once, you can see the boxes changing color and style in the pictures).

Photos: NYE food prep

Tue, 02 Jan 2024 22:38:24 +0000

Fog... again

Sat, 08 Dec 2018 01:05:19 +0000

I really like fog it seems… Here are some more pictures :-)

Visualizing focal lengths used in photos

Mon, 22 Oct 2018 13:58:00 +0000

I am currently in the process of (perhaps) buying a new camera. Currently I have a Sony A6000 with one standard zoom lens that has a focal length that goes from 18-50mm (or 24-75mm if you translate to 35mm sensors).

The cameras I’m looking at currently are full-format cameras, and the lenses for those cameras can get quite expensive - so I’m wondering if I can get away in the beginning just buying a fixed lens for the camera (cheaper).

Foggy morning

Fri, 19 Oct 2018 22:05:33 +0000

Wonderful morning today, sunshine and some fog.

Pixel 2 vs A6000

Tue, 16 Oct 2018 20:52:00 +0000

A comment on my instagram sparked a long running debate in my head - is carrying a real camera worth it?
I’ve felt that the need for a “real” camera is disappearing more and more with smartphones really stepping up the game.

Filenames with non-ascii letters

Mon, 21 May 2018 21:23:00 +0000

Let’s start off with a quick question!
Can you spot the difference between the two rows below?

/images/räksmörgås.jpg
/images/räksmörgås.jpg

I couldn’t.

My browser however insisted that there was no “räksmörgås.jpg” on the webserver – a file that from my point of view clearly was there.

Since the error only occurred with filenames containing the letters å,ä & ö I at first suspected that there was an issue with mixing up UTF-8 and ISO-8859-1, however, this wasn’t the case.

Filenames with non-ascii letters

Mon, 21 May 2018 21:23:00 +0000

Let’s start off with a quick question!
Can you spot the difference between the two rows below?

/images/räksmörgås.jpg
/images/räksmörgås.jpg

I couldn’t.

My browser however insisted that there was no “räksmörgås.jpg” on the webserver – a file that from my point of view clearly was there.

Since the error only occurred with filenames containing the letters å,ä & ö I at first suspected that there was an issue with mixing up UTF-8 and ISO-8859-1, however, this wasn’t the case.

Fog, Danderyd

Sat, 20 Jan 2018 16:10:30 +0000

Arc de triomphe, Montpellier

Wed, 10 Jan 2018 22:56:24 +0000

Animal crossing, Linköping

Mon, 08 Jan 2018 22:27:23 +0000

Why You Should Not Use the OneDrive Shorten Url Feature Right Now

Tue, 03 Feb 2015 20:57:28 +0000

Update 2016-10-20: Microsoft finally fixed this issue.

TL;DR; The shorten URL feature does not use encryption.

I am currently working as a software engineer developing with a web based B2B solution when I came across something interesting when performing some security analysis of the application.

A part of the application is to enable people within an organization to share information with each other and this will naturally lead to users linking to external resources. The application is HTTPS/TLS secured and all the external resources used at the moment resides on HTTPS/TLS secured servers. However, examining the links added by users I discovered somthing unsettling: Microsoft is not using SSL on their OneDrive URL-shortening service.

How Does Scrum Affect Maintainability and Usability?

Thu, 29 Jan 2015 13:05:04 +0000

Since I haven’t decided what I should use this blog for I though I might aswell use it as a public library of stuff that I’ve written.

The first paper I will publish here is summarizing research and previous work trying to find out how Scrum affects maintainability and usability.

Scrums effects on software maintainability and usability

Relaunching the Blog

Mon, 24 Nov 2014 22:55:18 +0000

The blog has just moved to a brand new server since the old one had to be “sent to the farm”, stay tuned for updates :)

Since the old blog had so many no-so-interesting and / or outdated blog posts containing a mixed variety of Swedish and English I decided to clear the blog and give it a new consistent lifestyle.

Hopefully for the better, the future will tell :-)