Amateur radio, space, technology and other geeky stuff by Alexandru Csete
Video recordings from the 2nd Open Source Cubesat Workshop are now available on YouTube, thanks to Libre Space Foundation. This includes my presentation about the Copenhagen Suborbitals Nexø II rocket cameras and video transmitter, which you can see below.
Continue reading “OSCW 2018: Live video from space using COTS hardware and open source software”
Peter Scott (OZ2ABA) and myself gave a presentation at the 2018 AMSAT UK colloquium about the avionics in the Copenhagen Suborbitals Nexø II rocket. This included the radios and the DVB-S2 video transmitter used on the rocket. A video recording of the presentation is now available on the AMSAT UK YouTube channel, thanks to BATC.
Continue reading “Avionics in the Copenhagen Suborbitals Nexø II rocket”
Here is a video recording of my presentation of the onboard cameras and the video transmitter, given at the Copenhagen Suborbitals Nexø II debriefing event.
Continue reading “Nexø II debriefing: Onboard cameras & the video transmitter”
In my previous post, I posted the raw footage recorded from the Nexø II onboard cameras. These videos give an excellent qualitative indication of how well the video downlink worked. I have now also processed the received telemetry data and have a more quantitative idea of the performance.
In my previous post, you could watch an edited video from the Nexø II onboard cameras. I have now also made the raw footage available on my YouTube channel.
Continue reading “Raw footage from the Nexø II rocket cameras”
During the last year or two, you may have heard me talk about rocketcam or rocket-cameras, teasing with pictures but without providing too many technical details. Actually, it all started with a cryptic tweet I posted on October 23, 2016:
I have a plan. pic.twitter.com/pboLyN4oK6
— Alexandru Csete (@csete) October 23, 2016
Continue reading “Video received from the Nexø II rocket cameras”
In October last year I learned about the UT-100 series of DVB-T modulators available from a company in Taiwan. At that time I have already been working with software defined video broadcasting; however, I still found the idea of a small USB-stick modulator very appealing for use with embedded devices. In this post I have collected my notes about setting up and testing the UT-100 modulator on Linux.
Continue reading “Using the UT-100 DVB-T modulator on Linux”
A lot has happened since I posted my ugly hacks required to take advantage of the H.264 compressor in the Logitech C920 webcam. Gstreamer 1.2 now includes a uvch264src that can be used to read H.264 encoded video stream from the camera eliminating the need for an external capture application.
Continue reading “Using the Logitech C920 webcam with Gstreamer 1.2”
A few closeup photos showing the eCAM32 3.2 megapixel camera mounted on top of the Gumstix Overo Water, mounted on the Tobi expansion board.
As promised in my last post, here is a quick demo of the eCAM32 3.2 megapixel camera connected to the Gumstix Overo Water. I am presenting two videos, one showing the setup where the eCAM32 camera board is mounted on top of the Gumstix Overo Water, the other one being a screen cast demonstrating some of the most common settings of the camera. I am using the Tobi expansion board because it has Ethernet interface allowing me to stream H.264 encoded video to a host PC running linux.