Johan Ehnberg – Inventions

Kedei touchscreen updated for buster

Aug 9, 2019

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by

Some years back, I created some scripts and a precompiled kernel for use with KeDei 3,5″ Raspberry Pi Touchscreen V2. I have now revisited those for use with Raspbian Buster and made it easier to install.

herostitcher, the command line video workflow tool

Dec 21, 2016

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by

Johan Ehnberg

in herostitcher

This project was actually born some years ago, after I got my first action camera and needed a tool to do image stabilization / deshaking in an automated way. This is my solution.

15A buck converter / step down module test

Jul 15, 2016

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by

Johan Ehnberg

in electronics

After being disappointed with the previous buck converter, this one actually seems to deliver what was promised. The specs at the Aliexpress shop indicate it is good for up to 10A without extra cooling, and that seems reasonable in my test. https://youtu.be/pE6p1DhcWfc

Raspberry Pi Photobooth

Jun 20, 2016

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by

Johan Ehnberg

in raspberrypi

After googling around, I found no viable photo booth software for my setup. So here is yet another photo booth for the Raspberry Pi.

Yiyelang “30A” 24v to 12v converter test

Jun 13, 2016

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by

Johan Ehnberg

in electronics

I finished a video about the cheap Yiyelang “30A” 24v to 12v converters found on AliExpress: https://www.youtube.com/watch?v=41VFxMAmOkU As expected, the magic smoke is released at the end. Enjoy!

Raspberry Pi TFT KeDei 3.5″ touchscreen V2

Jun 10, 2016

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by

Johan Ehnberg

in raspberrypi

Update: you will likely prefer the newer version for Raspbian Buster. Here’s how to use the KeDei 3.5″ touchscreen V2 with your own kernel.

BackupPC pre-loading / seeding and migrating / moving script

Nov 19, 2015

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by

Johan Ehnberg

in backuppc

This script can save (restore to tar), seed (pre-load) and move (migrate, switching between old and new backuppc partitions on the same server) BackupPC backups.

Getting the @-sign to work in Ubuntu on old MacBooks

Oct 12, 2015

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by

Johan Ehnberg

in ubuntu

At least with the Finnish keyboard layout, the @-sign does not work out of the box in Ubuntu on my old MacBook A1181, even with the Macintosh keyboard variant selected. This can be fixed by going to: System Settings -> Keyboard -> Shortcuts -> Typing And changing the Alternative Character Key to Right Win.