🎓 Dr. Freemo :jpf: 🇳🇱

Anyone out there other than me old enough to have run a 10base2 network in their home? My first computers 2 computers when I was in high school I connected together with a 10base2 with 50 ohm terminators and all that. My mom wasnt happy as I literally knocked a hole in her wall without asking her.

This was back when the internet was still fairly new so you would get on with 1200 baud modems to a BBS that would give you a piggyback onto the internet which you might be lucky to get access to for 30 - 60 minutes a day.

10base2 network card attached for prosperity.

@Science

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🎓 Dr. Freemo :jpf: 🇳🇱

Ya know those tiny network routers you have on your desk that you use to connect all your computers together and connect to the internet... Well this is what it looked like in the early days when the internet didnt exist as a word yet (It was still called ARPANet). Like most computer devices from the 70's it would take up a nice chunk of the room.

@Science

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🎓 Dr. Freemo :jpf: 🇳🇱

A map of every node on the internet (ARPANet) in 1974, which was exactly 3 years after the network first went live.

@Science

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🎓 Dr. Freemo :jpf: 🇳🇱

A 104 year old book I just added to my collection. It is still amazingly relevant too in the modern era. :doge:

@lucifargundam

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🎓 Dr. Freemo :jpf: 🇳🇱

@Science

This is so cool. With just a little bit of modification using a single 3d printed part glued to the side of the head of a 3d printer this japanese team managed to create a fully autonomous robot that can basically built its own tools, pick them up, and then use them to manipulate its environment.

spectrum.ieee.org/automaton/ro

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🎓 Dr. Freemo :jpf: 🇳🇱

Man I wish the American economy still had small stores like this... Radioshack put them all out of business then stopped selling it when places like digikey put THEM out of business.. now you can only order from a catalog and its just not as satisfying.

ledpixelart.com/shenzhen/


@Science

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🎓 Dr. Freemo :jpf: 🇳🇱

@Electronics

LOL @sharow@fosstodon.org just brought this meme to my attention, and it is perfect!

@funny

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🎓 Dr. Freemo :jpf: 🇳🇱

WooHoo, QOTO is trending on reddits r/engineering! It has been getting us a nice influx of new users too, cool!

reddit.com/r/engineering/comme

1
🎓 Dr. Freemo :jpf: 🇳🇱

Another style of directional coupler I had worked on.

0
🎓 Dr. Freemo :jpf: 🇳🇱

The hardest part of building a directional coupler is seeing how pretty and clean it is and knowing you will need to seal it away with copper walls and it will never be seen by human eyes again.

This was one of the more fun one day projects I ever did.

0
🎓 Dr. Freemo :jpf: 🇳🇱

Have I mentioned how much I love doing manhattan style prototyping?

0
🎓 Dr. Freemo :jpf: 🇳🇱

I have started working on my ROES SWR meter again. Hope to finish the v2 of the project in the next week and get some PCBs printed.

This has been int he making a long time now. Always wanted a super high-tech SWR meter.


QT: qoto.org/@freemo/1013371860019

🎓 Dr. Freemo :jpf: 🇳🇱  
A sneak peek at the first draft for the new UI in V2 of my ROES meter, an advanced SWR meter with VNA capabilities. I still need to cleanup the loc...
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🎓 Dr. Freemo :jpf: 🇳🇱

I feel like its time to upgrade the Transmission Line I use in my shake... Overkill?

reddit.com/r/nextfuckinglevel/

0
🎓 Dr. Freemo :jpf: 🇳🇱

Kina excited, my Protowaffle project is in the process of making its first Sale to an electronics retailer. Just waiting to hear how many they will buy. Lets hope it is a big sale

Also still offering free samples If anyone wants some free samples let me know, here is some info on it: protowaffle.com

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🎓 Dr. Freemo :jpf: 🇳🇱

Recently uploaded a copy of a book I was writing to help teach RF/AC circuit analysis. I never did finish it but the first few chapters I wrote has some really useful explanations. Anyone trying to learn electronics should take a look.

discourse.qoto.org/t/frequency

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🎓 Dr. Freemo :jpf: 🇳🇱

Now that the Discourse server is fully working, including the math rendering, I can start adding some content to it.

For my first post I wanted to share a tutorial I wrote on how to do frequency-domain nodal analysis on electronic circuits.

Here is the link:

discourse.qoto.org/t/nodal-ana

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🎓 Dr. Freemo :jpf: 🇳🇱

If anyone wants one of my protoboards for free to try out don't forget to send me a message. Here is the original post:

qoto.org/@freemo/1024678540686

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🎓 Dr. Freemo :jpf: 🇳🇱

I just finished a first draft of my Protowaffle Datasheet (electronics prototyping board for surface mount). I could really use any feedback before I go live with this.

git.qoto.org/protowaffle/proto

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🎓 Dr. Freemo :jpf: 🇳🇱

Sneak preview of the Protowaffle website my buddy luuk us working on. I love the colors.

Feedback, ideas, al welcome!

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🎓 Dr. Freemo :jpf: 🇳🇱

So I recently got a few thousand boards printed up for my protoboard design. Tested them on a few circuits and im amazed how well they work. I'm writing the datasheet now and we will begin selling on digikey, mouser, and many other big names soon.

In the meantime any EE people out there want a free board? We are going to hand out a few hundred for free to get people interested.

Here are some past posts I made about it for some background info. I've also attached an image of the final boards.

qoto.org/@freemo/1015184557966

qoto.org/@freemo/1015175640462

qoto.org/@freemo/1014718536196

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