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531 results for “abraxas3d”
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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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All tiles in place! Had to use the seam ripper a couple of times. Don't get your pattern accidentally turned upside down :)
Time for #Tessellation with #Hackerboxes #sewing project. This is a prototype for a larger #quilt and shows circle of fifths concepts.
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A more prosaic part of the pattern: attaching the #hackerboxes LED panels with buttonhole stitching. First one went down without incident. Soldering will be done with a shield protecting the fabric.
Time for #Tessellation!
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Time for #Tessellation prototype gets black and white checkered #quilt binding. Not a bad effect - reminds me of NASA rockets.
We are going with the #arduino IDE because it looks like all the needed libraries are there, and the circle of fifths demo running on the #hackerboxes parts will fit.
All code will be #opensource.
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Quilting the #prototype with #embroidery attachment is complete. Two goofs happened but got them fixed. One broken needle because the embroidery foot got hung up on the edge and dragged it under and sewed itself into a nice little cocoon. I backed that out and repaired it. Then, I finished the parts that the pattern didn't reach with a sewing foot.
Good quilt pattern? Time to weigh and consider. I'll be sending out the bigger quilt to someone with a longarm machine. I can do small stuff but a pro will really help here with the larger #quilt. This is commonly done in quilting.
Next: attach the #electronics and start #coding the #esp32 in the #hackerboxes #tessellate boards.
Time for Tessellation!
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Four groups of three black tiles are placed on the smaller prototype 35 cm #quilt square in #tesselated groupings.
Thanks to Frank Brickle for helping develop the theory here. We are tessellating the twelve note octave with #trichordal #generators of the aggregate. This concept will be reinforced with the LEDs and MIDI sound, triggered by the accelerometer in the white tile.
"Time for Tessellation" is powered by #HackerBoxes and explores GF 2^12 music theory concepts.
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I have one 35 by 35 cm square left over. I am going to use it to prototype the support structure (quilting layers) and the attachment of the #hackerboxes tiles.
For a stationary object like what I’m anticipating doing here (a wall quilt) the accelerometers on the controller tiles are largely wasted. However, ambient light sensing might be useful, as well as proximity detection. Making and sensing sound is, ironically, not something I’ve thought a lot about for this music-theory-oriented design.
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Laid out the material sets for Time for Tessellation. We have 56 tiles, and 32 7-by-7 inch fabric blocks,
#quilting with #hackerboxes
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"Time to Tessellate" square production continues.
A #hackerboxes #sewing project.
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"Time to Tessellate" electronic quilting project powered by #hackerboxes.
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I heard a rumor that #hackerboxes might have something really neat at #defcon this year for #radio folks.
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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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Cyclic prefix for the #OFDM symbols is working on #Neptune. Took longer than it should because the data visualization had some quirks.
Moving towards more of this #drone based protocol being in an #fpga
Really nice to work with such a professional and competent team of #opensource volunteers.
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There has been a lot of #OFDM work for #neptune, and #polyphase work for #Haifuraiya over the past week. We're looking forward to another great week ahead.
Haifuraiya, by the way, is an #opensource #heo or #geo communications payload for #hamradio.
There is a lot of great work going on, but if you have not been hearing about it and want to, then please add yourself to our newsletter audience here: https://www.openresearch.institute/newsletter-subscription/
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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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You may have heard of "Florida Man".
But may I present a solid example from my home state of Arkansas?
We are made a bit differently.
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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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The magic of seeing the people I support at @OpenResearchIns get great things done never gets old!
Thank you to all our volunteers for another great week. Getting up on a Monday and being able to dive right in and help #opensource digital radio work is a privilege that I do not take for granted.
Most of what we do is on the #hamradio bands and is of direct benefit. The proof is what's on the air, from #ribbit, #RFBitBanger, #neptune, to #Haifuraiya
Next demo? #defcon32 at #RFVillage.
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Thank you to everyone helping with both #ribbit and #rfbitbanger, and with all the #fpga work for #neptune and #Haifuraiya
We couldn't do it without you. Some great #opensource #hamradio work going on supported by @OpenResearchIns and #ARRL, #qsotoday, #RAPAC, and more.
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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.