Tech, ham radio, hacking, weather. I enjoy experimenting with SDR, designing and testing antennas, contesting (usually with the team at KZ1W), SOTA/POTA, and satcom. Professionally I'm a hardware/FW/SW engineer and have spent most of my career in the drone industry. I enjoy making maps, both with drones and otherwise, with a focus on multispectral data collection and analysis.
Created http://satmatch.com to help satellite rovers better plan operations.
DXPedition @T88WA
He/him
I could use some #retrocomputing help!
I recently acquired a (homebuilt) device from a friend, and as a labor of love, I'm trying to restore it for him.
It has a single broken key (contacts are broken), which I don't see any good way to fix without replacement.
Anyone have any idea what this keyboard is?
Boosts are appreciated!
EDIT: I'm quite sure the prosigns (CH, CT, KN, AR etc) are label modifications. Also, the device origin is Australia or Canada.
I made an LED hat by weaving LED pebble strings with poly rattan. Pure braiding, no glue involved. 475 LEDs in total, controlled by a @wizard Pixelblaze. More pictures 👇🧵
@ftg @mxshift @dysfun agree. There's the original Alford loop patent, but it doesn't really reflect what seems to be going on here, even though the D&M is called a modified Alford loop. https://patents.google.com/patent/US2283897A/
@ftg @mxshift @dysfun that is what the schematic seems to say, but I'm actually not completely sure now, after a lot more research. Everyone regurgitates the same schematic image, but the best image I've found of it is this one from https://carleton.scholaris.ca/bitstreams/52972888-15b0-48e4-a962-c3af09b38cc2/download
I modded an IKEA OBEGRÄNSAD lamp with my LED driver & custom firmware. It now displays 16bit grayscales @ 120 FPS.
https://github.com/brainsmoke/esp32leddriver/tree/master/firmware/stm32/obegraensad
@ExplodingLemur @m1geo if you order a replacement, any chance you can order a spare and let me buy it off you? I've been trying to purchase for a while but never got a response. Happy to send you a paid label.
@ExplodingLemur @m1geo if you order a replacement, any chance you can order a spare and let me buy it off you? I've been trying to purchase for a while but never got a response. Happy to send you a paid label or just buy you a ☕.
@hine yeah I think so let me double check with Nick first
@azonenberg my kids are avid readers so a lot of more complex words they read before they heard, which has resulted in a lot of interesting pronunciation that is hard to break the habit on. Tonight it was electrolysis, pronounced "electro-lysis" rhyming with electro rices. Hopefully he'll get that one sorted out before his presentation on it 😂
Announcing: https://justaqrcode.com.
Tired of "free" QR code generators that are full of ads and trackers, that share your data, and that want to sell you something? Me too. Here's my act of resistance: I made a one-page site that works entirely in your browser to generate a simple QR code. And that's all it does. You can download the HTML page and run it locally, even. Read the source; nothing up my sleeves. Just a QR code.
My offer to you -- I will continue to pay for the domain name and web hosting for it, myself. If you find it valuable, you can pay it back by creating your own useful thing for the world and releasing it for free. Let's take back the friendly web, one vexingly-monetized utility at a time!
I personally believe that most effective way to speed up CW receiving is by practicing ICR (Instant Character Recognition). This method has had the largest effect on my receiving. Even short practices seem to have noticeable effect.
I previously released iOS App for this and now it is available as web based. Remember to use physical keyboard!
Go a head and try it! Post your results too!
@tsherrygeo you know the maths. You'll be ready.
I’ve been named the 2025 “Top Graduate Student” for the MS in Electrical Engineering program at Wright State University.
Truly honored and grateful to be recognized for the countless late nights spent on coursework and research—especially the collaborative work with The Ohio State University.
Huge thanks to the incredible faculty, friends, family, co-workers, and mentors who supported me throughout this journey.
So the reason my IC-7300 was so deaf this week is that it was mistakenly plugged into my X30 VHF antenna. My LDG Z-100Plus tuner was working overtime and I just couldn't hear anyone. I did manage to get a QSO on 30 meters CW with it 😬
@fl_0 shoot me an email (on qrz) and I'll send you some code. The Y axis direction is flipped which makes the Polar to Cartesian math a little weird.
@fl_0 no, but they're just manually formatted SVGs. Open one in a text editor and you'll get the idea. I use drawSVG in python now, initially I wrote them by hand.
@grajohnt only if it's linearly polarized. If it's circular you'll lose 3dB.
@vk6flab sure, but the price for the package deal is a bit higher, and the lead time is pretty long
Today is your last day to order a SotaCAT this year! Get WiFi control, click-to-tune spotting, and SotaMAT integration on your KX2/KX3. We have a few in stock still; any in-stock orders today will ship tomorrow, then we're taking the holidays off. #hamradio
https://store.invertedlabs.com
