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Using Sonoff basic switches with own firmware
10 mins
Example how to flash Sonoff basic switches with custom firmware (using cli tools or the Arduino IDE)
Building a LoRA WAN gateway (and supplying data for the things network)
18 mins
The following article leads the reader through building an LoRA-WAN gateway from an iMST ic880a concentrator board and an RaspberryPi. Optionally is shows the reader how to add GPS, enable remote configuration via the tinc VPN daemon and via a TOR stealth hidden service.
Android development on FreeBSD
2 mins
How to get started with Android development on FreeBSD (using Android Studio)
Automatic domain validation TLS certificates with acme.sh and let's encrypt with own DNS servers
10 mins
A tutorial on how to automatically manage TLS certificates for various services with DNS challenges and an zone served out of a bind zonefile that is protected via DNSSEC.
Strahltest und Bestrahlung von Silizium-Teilchendetektor Prototypen
1 min
In this diploma thesis the usability of particle detectors for their use in a large particle physics experiment is verified. For this verification they are used during a beamtest at the super proton synchrotron at CERN. First there is a description of the mode of operation and interactions of particles with the detectors, the readout system as well as the experiment and the characeristic damages of silicon particle detectors under irradiation. To analyze the data, software will be extended by fitting modules, calculation modules for signal to noise (SNR) ratio and new reporting modules. Additionally existing components will be modified to be able to analyze the data. Because there has been a speculation about errors accounted for by the fabrication process and because the behaviour of the detectors after irradiation is essential for characterisation of particle detectors, the detectors have been irradiated at an Co60 gamma source. This irradiation was followed by another beamtest. At the end there is an interpretation of the results according to the performance and effects of the irradiation as well as an interpretation according to the suspected manufactoring errors. Results also will be compared to electrical measurements that have been performed parallel to this thesis.
A simple colinear coaxial 1090 MHz antenna for ADS-B
7 mins
A really simple colinear coaxial 1090 MHz antenna for ADS-B, one of the most simple antenna constructions that can be used to receive automatic dependent surveillance squitters using low cost software defined receivers such as DVB-T sticks.
Speicherprobleme bei Android auf รคlteren Gerรคten umgehen
3 mins
A short description of the davlik.vm.* tuneables for memory management tuning on Android devices
DNSSEC (manuell) mit BIND Werkzeugen
4 mins
How to automate DNSSEC signatures on a manually managed zone
