Publish to Maven Central Repository

April 21, 2021 - Reading time: ~1 minute

Just some random notes to myself (aka "Move along, folks. Nothing to see here."):

mvn verify gpg:sign install:install deploy:deploy

Remove superfluous apps from Lenovo Yoga Smart Tab

June 5, 2020 - Reading time: 2 minutes

I tried to deactivate several apps which I did not use on my Lenovo Yoga Smart Tab. Unfortunately the Play Store displayed updates for them soon after and they were activated again by some kind of magic.

To remove the apps I do not want on my device I connected via

adb shell

and uninstalled them by running the following commands:

pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0 # Google Duo
pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0 com.lenovo.screenassistant
pm uninstall -k --user 0        # Digital Wellbeing
pm uninstall -k --user 0        # Files
pm uninstall -k --user 0                # GMail
pm uninstall -k --user 0            # Google Drive
pm uninstall -k --user 0                # Skype
pm uninstall -k --user 0            # Google Play Videos
pm uninstall -k --user 0            # Google Play Music
pm uninstall -k --user 0
pm uninstall -k --user 0
pm uninstall -k --user 0

Packages can be searched with

pm list packages | grep SEARCH_TERM

Viewing the output of a C64 on a laptop via an STK1160 based video grabber

January 22, 2020 - Reading time: 2 minutes

I bought a cheap (< €15) USB 2.0 video grabber which is based on the SyntekSTK1160 chipset. My goal was to display the output of my Commodore 64 on the screen of my laptop. The cable which connects the C64 with the video grabber allows me to use an s-video signal.

Commodore 64 connected to Linux system via video grabber

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Fixing failure of software upload to µController

December 5, 2019 - Reading time: ~1 minute

If uploading software from the Arduino IDE or the commandline via avrdude to a microcontroller like an Arduino or an ESP8266 fails due to missing access rights ("Permission denied"), what helps is either

sudo chmod a+rw /dev/ttyUSB0

or adding the user to the group "dialout":

sudo usermod -a -G dialout theuser


Repairing the file system of Debian after hard shutdown

October 14, 2019 - Reading time: ~1 minute

Sometimes after a hard shutdown the file system of my laptop is corrupted and Debian starts in maintenance mode.

What helps is repairing the file system using the command

fsck -y /dev/sda1


Changing the RAM chip of the Super Snapshot V5

September 4, 2019 - Reading time: 2 minutes

The manual of the Super Snapshot V5 mentions that the 8kB RAM chip of the cartridge can be upgraded to 32kB. Back in the days™ it was possible to send the cartridge to LMS Technologies. Nowadays this is not an option anymore and I was happy to find an article by Chris Kobayashi which describes the required steps. Since the article does not contain any illustrations, I decided to share some photos I took when I changed the RAM of my Super Snapshot V5.

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