Backing up Android and Apps for an Upgrade
Sunday, October 3, 2021
From time to time, a software upgrade is is needed. A upgrade - in contrast to an update - is a more
invasive way to install a new version: Everything is deleted and installed from ground up. This is required
e.g. when you want to upgrade from LineageOS 17 to LineageOS 18, like I recently did for a Fairphone 2 phone.
Code signing with let's encrypt certificate for your github pages domain
Thursday, September 16, 2021
If you want to sign your code, you need a certificate. You can create a self-signed certificate, but
then the users still need to accept your signature. Code signing is often used for eclipse and eclipse plugins.
If you install a eclipse plugin, which is not signed, you always need to say “Install anyway…”. If your
plugin would be signed - especially with a certificate that is trusted - this dialog wouldn’t show and the
plugin is installed without notice.
Connecting GoTek Floppy Drive Emulator
Saturday, July 17, 2021
In order to spare my existing real floppy drives (actually only 1 is still fully operational) I decided
to use a floppy emulator. The idea is to replace one of the floppy drives with the emulator and this emulator
will appear as a “normal” floppy drive to the alphatronic.
Measuring Floppy Drive rotation speed - Part 5
Sunday, June 20, 2021
Here is another silly way, how to measure the drive rotation speed. Remember you have a smartphone?
Your smartphone probably has a gyroscope - a sensor to measure acceleration and to figure out, if the
smartphone is upside down.
Measuring Floppy Drive rotation speed - Part 4
Sunday, May 23, 2021
This is a continuation of Measuring Floppy Drive rotation speed and Measuring Floppy Drive rotation speed - Part 2 and Measuring Floppy Drive rotation speed - Part 3.