www.jung.ms

📡 TinyWSPR – Generating Shortwave Signals on Open-Source Silicon

Matthias Jung — Wed, 10 Dec 2025 11:28:51 +0100

Weak Signal Propagation Reporter (WSPR, pronounced “whisper”) is a well-known tool in amateur radio for analyzing the propagation of shortwave signals. These signals are refracted by the ionosphere, allowing them to travel remarkable distances around the globe, even with just small transmit powers of just a few milliwatts. The tool …

Copy Sent Mails to Inbox (Outlook)

Matthias Jung — Tue, 17 Aug 2021 11:24:53 +0200

I don't like sent folders. I always want to have all my emails in my inbox. This can be easily solved on macOS or Linux but on Windows some VB is required:

Public WithEvents myzinskyApp As Outlook.Application

Private Sub Application_Startup()
    Set myzinskyApp = Outlook.Application
End Sub

Private Sub myzinskyApp_ItemSend …

How to Solder Xiegu G90 Sound Cables

Matthias Jung — Sun, 31 May 2020 07:06:00 +0200

Very often it is asked how to solder the delivered sound cables of the G90 correctly. I propose two different solutions how to solder them:

CloudLog CAT Interface for macOS, Linux and Windows

Matthias Jung — Sun, 17 May 2020 21:58:35 +0200

The CloudLogCatQt app can be compiled on Linux, Windows or Mac for providing CAT support for Cloudlog. The app uses a connection to FlRig and syncs the frequency and mode of your TRX with the cloud log QSO website (cf. here).

For Windows and Linux/macOS command line there exists …

Xiegu G90 with macOS

Matthias Jung — Wed, 06 May 2020 22:17:54 +0200

Since some months I own a Xiegu G90 shortwave transceiver. It is a very nice SDR radio that offers everything that you need for a good portable QRP setup. One major thing that bothered me was that I was not able to get WSJTX running smoothly with it. Although the …

gem5 ARM Bare-Metal Example

Matthias Jung — Sun, 12 Jun 2016 13:38:04 +0200

On the gem5 mailing list are often quesitons regarding bare metal usage with full system simulation.

This git repository shows a simple example for an ARM Bare-Metal implementation with gem5. It can be used as a starting point for bare metal projects with this simulator.

I hope that this code …

Google Scholar Citation Widget for your Website

Matthias Jung — Sat, 27 Sep 2014 17:02:07 +0200

There is no citation widget of Google Scholar available, which can be used on custom websites. I wrote a small php script that parses the Google Scholar website and filters out the citation table and diagram.

Google Scholar

The script needs your Google Scholar ID, which can be found in …

Modify Timestamp for Images

Matthias Jung — Thu, 12 Jun 2014 08:32:10 +0200

At my last trip to San Francisco, I forgot to change the timezone of my DSLR camera. It's easy to fix with the tool Jhead:

jhead -ta-9:00 *.JPG && jhead -ft *.JPG

-ta changes timezone and -ft applies the EXIF date to the file itself.

Testbildgenerator mit Raspberry Pi für Amateurfunk Fernsehen (ATV)

Matthias Jung — Sat, 28 Jul 2012 20:53:00 +0200

Man benötigt ein Raspberry Pi und eine kleine SD-Karte (2Gb oder so wären eine Verschwendung :) Dann besorgt man sich von http://www.dex-os.com/DexBasic/DexBasic.htm das DexBasic Paket. Damit kann man sehr einfach das Raspberry Pi ohne Linux Betriebssystem in einer Assemblersprache programmieren. Um ein Bild Anzuzeigen sind …

Convert vCard to Fritzbox Addressbook

Matthias Jung — Mon, 09 Jul 2012 09:06:25 +0200

To convert a vCard addressbook to the fritzbox xml format I wrote this short perl script.

#!/usr/bin/perl -w
use warnings;
use strict;

my $inputFile = shift;

open(VCARD, $inputFile);

my $newContactFlag = 0;
my %nameNumberHash;
my $name;
my $i = 0;

# Input section

sub umlautwechseln {
    my $messystring = shift;
    my $conversion = shift …

Writing Umlaute with Capslock + [a,o,u,s] for Mac, Linux and Windows

Matthias Jung — Tue, 19 Jun 2012 06:41:05 +0200

Mac

Go to the system settings and change the Capslock behaviour to Option/Alt:

Now download the following software:

Link http://pqrs.org/macosx/keyremap4macbook/

Go to system settings --> keyremap4mac --> Misc & Uninstall --> Open private.xml

Then insert the following:

<?xml version="1.0"?>
<root>
  <item>
    <name>Myzinsky Umlaute</name>
    <appendix …

Issue in DCP135C Linux Driver

Matthias Jung — Sat, 25 Feb 2012 12:43:27 +0100

Change PaperType from Letter to A4 in following Files:

/usr/local/Brother/Printer/dcp135c/inf/brdcp135cfunc/usr/local/Brother/Printer/dcp135c/inf/brdcp135crc

Then there is no shift in your printings anymore.

Berlin Uhr Android App

Matthias Jung — Thu, 05 Jan 2012 21:38:41 +0100

Die Berlin Uhr App für Android: Erste Version der App hab ich diese Woche im Market hochgeladen!
Anpassung an das Original-Design und ein Widget in Planung!

Market Link

Hintergrund:

Die Berlin-Uhr, auch inoffiziell Mengenlehreuhr genannt, ist eine öffentliche Uhr in Berlin. Sie wurde 1975 von dem Erfinder Dieter Binninger im …

Kmymoney2 mit Kreissparkasse Saarpfalz

Matthias Jung — Sun, 24 Jul 2011 20:58:14 +0200

KMyMoney ist ein KDE-Programm zur Verwaltung persönlicher Finanzen, das auf ähnliche Weise funktioniert wie Quicken und Microsoft Money. Es unterstützt verschiedene Konto-Typen, Kategorisierung von Einnahmen und Ausgaben und die Abstimmung von Bankkonten.

Mit Hilfe von AqBanking kann man sein Konto auch mit der Kreissparkasse Saarpfalz synchronisieren. Die nötigen Einstellungen findet …

mensa-kl.de Perl Parser

Matthias Jung — Thu, 18 Nov 2010 10:49:25 +0100

Simple mensa-kl.de parser for Perl (e.g. IRC-Bot)

#!/usr/bin/perl -w
use strict;
use warnings;
use LWP::Simple;
sub gm($)
{
    my $date = shift;
    my $out;
    my $url = "http://mensa-kl.de/api.php?date=$date";
    my @values = split('\n', get($url));
    foreach my $val (@values)
    {
        if($val =~ /^.+\|.+\|(.+)\|(.+)\|.+\|.+\|.+\|.+\|.+$/)
        {
            $out .= $1 …

Complex Fourier Descriptors

Matthias Jung — Thu, 18 Nov 2010 09:03:27 +0100

Any contour of length $N$ can be described as a sequence $(x(k),y(k)) k = (0...N)$ .

We can write this as complex notation:

s(k …

Jukebox

Matthias Jung — Wed, 17 Nov 2010 11:27:33 +0100

Jukebox is MPD client for touchscreens written with Qt and libmpd. It is a customised application for the student pub Nachbrenner at TU Kaiserslautern.

Customers of the pub are able to:

enqueue songs into the current playlist
surf the web
get information about the filling level of the beer barrel …

Date Rename

Matthias Jung — Tue, 16 Nov 2010 23:11:14 +0100

This perl program renumbers files by their creation date. Possible arguments are file-extension and basename.

Examples:

- daterename -e jpg -n "pic\_"
- daterename -e jpg -n ""

Here is the code:

#!/usr/bin/perl -w
use Cwd;
use strict;
use warnings;
 
sub daterename($$)
{
  my $type = shift;
  my $name = shift;
  my $path …

Thesis - Real-Time Image Processing on FPGA

Matthias Jung — Sun, 14 Nov 2010 17:46:38 +0100

Implementation of Miscellaneous Edge Detection Algorithms

In this thesis miscellaneous edge detectors were implemented on an embedded system with a FPGA. Edge detection is an important step in the digital image processing hierarchy because the data rate is drastically reduced. Following units like object recognition obtains only relevant data.

The …