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531 results for “abraxas3d”
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Trying to get the #mathworks #buildroot SD card image built. This is for a #zynq #zc706, using the build.py straight out of the repo on supported hardware for supported versions of MATLAB, HDL Coder, and Vivado.
Lots of errors. Could use some opinions and advice.
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Trying to get the #mathworks #buildroot SD card image built. This is for a #zynq #zc706, using the build.py straight out of the repo on supported hardware for supported versions of MATLAB, HDL Coder, and Vivado.
Lots of errors. Could use some opinions and advice.
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Trying to get the #mathworks #buildroot SD card image built. This is for a #zynq #zc706, using the build.py straight out of the repo on supported hardware for supported versions of MATLAB, HDL Coder, and Vivado.
Lots of errors. Could use some opinions and advice.
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Trying to get the #mathworks #buildroot SD card image built. This is for a #zynq #zc706, using the build.py straight out of the repo on supported hardware for supported versions of MATLAB, HDL Coder, and Vivado.
Lots of errors. Could use some opinions and advice.
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I've been a member of San Bernardino Microwave Society #SBMS for many years.
I just wrapped up a couple of years serving as Recording Secretay. I took minutes. I included a summary of all member roundtable reports. I helped with multiple #ARRL #club #grant applications and was involved with the #ARDC Cactus Network grant applications.
I have some opinions, shared by the rest of the board, about how a sudden influx of money has affected one of the best technical #hamradio clubs in the USA.
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Yesterday we got the #VHDL #testbench for part of our #opensource #DVB-S2 #fpga amateur #satellite encoder working (and it PASSED!) on the command line, using GHDL. This is great! 🌈
The parallel effort in Xilinx Vivado didn't work, because vunit (a necessary component of the testbench) doesn't support xsim in Vivado.
This word salad boils down to "open source helps advanced digital communications in amateur radio"
The support for vunit working in Vivado has been a filed issue since 2017.
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Yesterday we got the #VHDL #testbench for part of our #opensource #DVB-S2 #fpga amateur #satellite encoder working (and it PASSED!) on the command line, using GHDL. This is great! 🌈
The parallel effort in Xilinx Vivado didn't work, because vunit (a necessary component of the testbench) doesn't support xsim in Vivado.
This word salad boils down to "open source helps advanced digital communications in amateur radio"
The support for vunit working in Vivado has been a filed issue since 2017.
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Progress on a #polynomial signals representation project:
This is a new/old idea that makes specific promises, has some research, but doesn't have a lot of practical radio development or useful applications (yet).
Well, that's what we're here for!
There's repository started over at @OpenResearchIns
at https://github.com/OpenResearchInstitute/Polynomial_Signals_RepresentationTrying to put together a coherent tutorial so that ordinary radio enthusiasts can get some traction.
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Thank you very much to #RATPAC for the opportunity for #ARRL Technical Coordinators and volunteers to meet and greet and speak about the breadth and depth of their work.
This was a great meetup with concrete results. We especially thank George Spatta W1GKS, the ARRL Lab Manager, for his keynote welcome address and active participation. I will organize another ARRL technical volunteer meetup for next quarter.
Video recording of the zoom meetup will be posted in the next few days.
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You are invited to an #ARRL #Technical #Volunteers Celebration on 24 May at 1800 US Pacific time (0100 UTC). This is a virtual event for amateur radio operators to recognize, thank, meet, and greet ARRL Technical Volunteers.
George Spatta W1GKS, the Laboratory Manager at ARRL, will open the meeting with a keynote welcome.
RATPAC has generously offered the use of their Zoom platform for the meetup. Find out more about #RATPAC and how to get a meeting invite at https://www.ratpac.us/
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#ARRL Technical Appointees meet-and-greet Proposed
I'm a member of the planning committee of #RATPAC
Site is here: https://sites.google.com/view/ratpac
Last night at the weekly planning meeting, we talked quite a bit about how to bring all the technical appointees (TA, TS, TC) together in an online meet-and-greet. RATPAC offered their platform.
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Thursday, January 26 #RATPAC
Zoom Presentation
10:00 PM AT / 9:00 PM ET / 8:00 PM CT / 7:00 PM MT / 6:00 PM PT / 5:00 PM AKT / 4:00 PM HT / 02:00 AM GMT FridayTOPIC: "Which Switch is Which"
Facilitator: Marty Woll, N6VIMeeting link at https://www.ratpac.us/
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Curious about #RATPAC ?
Short video introducing the resources can be found here:
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Thank you to #RATPAC for the opportunity to talk about #linux in #hamradio last night. This was a brand new presentation with a goal of featuring the impact of embedded Linux in amateur radio experimental open source work.
The Q&A was great as always, and gave me a lot of ideas for revising and refining the talk. There’s a very large gap between basic “hello world” and “getting started” and advanced work. Given the number of distributions and variety of hardware, it can be a bit overwhelming.
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Question from #RATPAC
"Are #arduino still relevant for #hamradio work?"
Answer is complicated and depends on the documentation and support.
Raspberry Pi was brought up immediately, but one can actually buy Arduinos, and Pis are very hard for many to get.
Pis preferred by many, but not available, and arduinos are available, but those assembled for the discussion considered them harder to use.
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Here's an #AmateurRadio #activity #challenge for you, courtesy of #RATPAC.
Transcription will follow as a reply.
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The only wrinkle with this particular box was a bent pin on the (5 volt) SR04 included.
It is *extremely* rare to have any damage in #HackerBoxes. This is the exception that proves the rule. I have subscribed for almost 6 years, and this is the first time I've gotten anything bent up in the box.
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Why am I especially enthusiastic about this #hackerboxes
Because I have done some things with #ultrasonics and really like them for experimentation.Here's my #array design, which goes on the front of an #autonomous #robot made out of a #Zuca rolling backpack.
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Here is everything in #HackerBoxes box number 86 laid out on the desk. The #ultrasonic transducer is immediately recognizable. There's a PCB (black middle bottom) and lots of components. They include a postcard-sized documentation in the box that usually gives a lot of hint about the capabilities and specifications of key components.
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@sa5kpr I thought I recognized that board. I think it is the ESP32-A1S Audio Development Kit.
I have one from #hackerboxes, and was looking to try to get it up and running for experiments with and demos for Opulent Voice. Thank you for posting. Maybe we can encourage each other to make some progress :D
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Started the process of adjusting the design constraints to get the #ADRV9002 working with the #zcu106 in @OpenResearchIns #FPGA Remote Labs. Got the simple stuff done first - GPIO switches and LEDs.
This rig will be used for #Neptune, an #OpenSource #ofdm low-layency project for #Drones and #aerospace
Draft specification has been circulated for initial review.
Leonard Dieguez, an FPGA designer with military rotary wing background, is the project lead.
More updates soon :)
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If you've gotten the zcu106 to work with an ADRV9002 the same way it does with a zcu102, let me know!
Trying to get this on the air in @OpenResearchIns Remote Labs for an #opensource #OFDM #transceiver project.
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Very excited about this month's #HackerBox
Their full writeup will be out tomorrow, but here's what is inside.
#Theremin and #ultrasonic !
First, what is HackerBox? It's a subscription electronics experiment kit. It come unassembled, so there is #soldering.
#OpenSource is emphasized and enabled. The boxes cover a huge variety of electronics applications.
I use them as project kits but also to bulk up my "stash" of electronics parts.
Currently costs $44/month
https://hackerboxes.com/products/hackerbox-monthly-subscription
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Great presentation by Mikio-san JA3GEP about #QO-100 at the #JAMSAT monthly meetup today. Berni DJ5MN spoke in appreciation for the highly successful activation of Christmas Island.
Talk about edge of coverage - very interesting expedition! More details and photos will undoubtedly be in an upcoming Jamsat Journal.
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After the COBS protocol is implemented on the #amateur #satellite downlink, then we move to to uplink receiver.
Here's how FSK can be received with HDL (Verilog). Diagram in the image below.
There's more advanced ways to do it, but this is where we're starting over at ORI. The multi-channel uplink will be done with multirate techniques. This is for #opensource #HEO payload work.
If you want to learn more or keep up, then please visit https://openresearch.institute/getting-started. Everyone welcome, CoC enforced.
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Final stretch of an important component for a COBS protocol decoder. This goes into #Haifuraiya which is an #opensource #HEO or #GEO #amateur #satellite on the #microwave bands.
This writeup shows how the #VHDL was designed for the #FPGA used.
There's a bug with tlast right now, but it's a problem only when frame delimiters are stretched more than a byte. This isn't something that "should" happen, but it "could", so the decoder is designed to tolerate it.
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#opensource #fpga work for #amateur #satellite. Better testbench revealed mistakes in the combinatorial part of the #HEO transponder design. Will get fixed today. This is a COBS protocol decoder, to make the downlink baseband frames much more resilient.
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The current #JAMSAT Journal has Open Research Institute's #opensource #amateur #HEO #satellite proposal, called #Haifuraiya. Plenty of details, runs pages 17-29.
In Japanese, kindly translated from English by Mikio Mouri JA3GEP.
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For complex RFICs, the behavior is set by profiles or configuration files. For an #opensource #amateur #HEO #satellite we are working on at #ORI, the profile sets the symbol rate as low as the chip can go: 10 MHz.
Here in the image we are at an intermediate step of modifying rates. On a spectrum analyzer is data from a DMA read coming from a Zynq, transferred to an AD9371, and TX at 2 GHz in the lab.
Volunteer on this or a growing number of other projects at http://openresearch.institute/getting-started