Beginner – Antennas
Antenna size depends on the frequency you want to hear: higher frequency (bigger number) – smaller antenna.You need an antenna that receives signals from all directions – called omnidirectional.Materials make no difference: any type of wire is good, as long as it keeps its shape. Metal coat hangers are popular, multi-stranded or solid makes no difference. I’m… Leer más: Beginner – Antennas »
dump1090
https://github.com/mutability/dump1090 Changes required for Plane Plotter Mlat (multi-lateration) So that’s Malcolm’s version of dump1090 installed and running on your RPi. This version already incorporates the changes required for a Plane Plotter Mlat Ground Station. Run the new version of dump1090 by typing: ./dump1090 –interactive –net You should see the same display as before on the… Leer más: dump1090 »
Visualizing Ultrasound with Schlieren Optics Part I
Radio-Astronomy with RTL-SDR, RPi and Amazon AWS IoT
https://www.hackster.io/mariocannistra/radio-astronomy-with-rtl-sdr-rpi-and-amazon-aws-iot-45b617 http://rishi-patel.blogspot.com/2013/10/summary-of-horn-antenna-project.html
Build a Cloud Chamber
Nuclear Thermal propulsion
https://beyondnerva.com/nuclear-thermal-propulsion/ Unlike most things at Beyond NERVA, the nuclear thermal rocket (NTR) has been built and tested by both the US and the USSR. Both programs looked at a solid core NTR, the simplest type of nuclear rocket. In a nuclear thermal rocket, the heat from a reactor is used to directly heat a propellant,… Leer más: Nuclear Thermal propulsion »
Optimal font-smoothing for Calibre ePUB Reader
September 25, 2017 Previous | Calibre is a pretty popular eBook reader but it has a weakness. Fonts looks terrible, at last on Windows. Here you’ll find an easy solution for this. This is my CSS Stylesheet for a better “Font Smoothing” in Calibre and it works pretty well. I recommend the following fonts, in case they exist on your machine. Category: CSS
¿qué es la Capacidad de Peukert?
Ahora, ¿qué es la Capacidad de Peukert?Es la capacidad de la batería medida en un rating de descarga de 1 amperio. Las baterías casi nunca dicen la capacidad de Peukert, los distribuidores basan la capacidad en ratings de descarga muy bajos, ya que duran más y obtienen mejores lecturas de esta forma. Se conoce como tasa… Leer más: ¿qué es la Capacidad de Peukert? »
antimatter
That is what antimatter can do. Annihilating a kilogram of antimatter will give out about ten billion times the amount of energy released when a kilogram of TNT explodes. Under suitable circumstances a proton can change into a neutron and emit energy some of which materializes as a positron, similar to what happens in the… Leer más: antimatter »