Allgemein
VU+ Duo2 white blinking LED – Fixing the power supply
One day i heard a the HDD of my VU+ Duo2 clicking. Afer a power cycle there was only a flashing blinking white LED on the receiver. After i opend the box i saw the swelled capacitors (C8/C9) on the power supply. I removed one and make a short measurement and there was only 118.5µF […]
End Fed Antenna
How to build an End Fed Antenna for 10m/20m and 40m. It is also possible to build one for 80m and 160m. I used this manual from PD7MAA http://pa-11019.blogspot.com/2012/04/149-transformer-for-endfed-antennas-35.html. I built the 10/20/40 version because I do not have enough space for the longer version. I ordered my missing parts from „Reichelt Elektronik“ (see the list […]
Using Rigol oscilloscope under Linux
Controll and view Rigol oscilloscope with DS Remote under Linux. I’m using a Rigol DS1202 with Ubuntu 20.10 (Groovy). First install DS Remote: sudo apt-get update sudo apt-get install g++ make git qtbase5-dev-tools qtbase5-dev qt5-default git clone https://gitlab.com/Teuniz/DSRemote.git cd DSRemote qmake make -j4 sudo make install Now start DS Remote with command or use menue […]
Your own search engine part 2: web interface
Please read part 1 first. Once we have built the search engine, we need a nice web interface for it. I created a simple one with AJAX Solr. You can download it here: search.tar.gz Just put it on any web server like Apache or NGINX. Settings: In ‚lib/nutch.js‘ you can configure your solr server: solrUrl […]
Homematic with Yeelight Xiaomi Mi Bedside Lamp 2
Send simple commands to Yeelight Xiaomi Mi Bedside Lamp 2 from Homematic. I have a doorbell connected to my Homematic CCU2. In this example it should flash blue a few times if the doorbell rings. You need the CUx Daemon installed on your Homematic CCU and an Exec-Device registerd in your CCU. Here is a […]
Commandline API for Yeelight Xiaomi Mi Bedside Lamp 2 MJCTD01YL
The Yeelight Bedside Lamp is an WiFi RGB lamp. You can control it with an App on your mobile phone. But it also have an API. It accepts JSON-formatted commands. On Linux it is realy simple to send them to your lamp. To start using this API i give you a few examples. The usage […]
Your own search engine with Apache Nutch 1.16 on Debian 10
In 2016, I wrote an article for the Linux Magazine about an personal search engine: * Suchmaschinenserver im Eigenbau (Ausgabe 02/2016)* Go Find It (Issue #186 / May 2016) A lot has changed in the past few years. New Nutch versions, new Solr versions and of course new OS versions. Here is a little updated […]
Force https to http redirect except for WordPress /wp-admin directory
First move all requests that are not wp-admin requests from https to http. Than i want to exclude all of WordPress admin from the https to http redirect, to keep WordPress admin working over https, so this is the result: RewriteEngine OnRewriteBase / RewriteCond %{HTTPS} off RewriteCond %{REQUEST_URI} ^/?(wp-admin/|wp-login\.php) RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L] RewriteCond %{HTTPS} […]
Happy SysAdmin Day! 2015
July 31, 2015 – 16th Annual System Administrator Appreciation Day http://sysadminday.com http://www.sys-admin-day.de http://de.wikipedia.org/wiki/System_Administrator_Appreciation_Day
System Administrator Appreciation Day – 2013
To all other system adminstrators „HAPPY SYSADMIN DAY !“