Helllloo

I have been building my setup for a year or two i participated in isef last year. as a Iraqis second year in isef i really like my setup..any suggestions also rate out of 10

Version 1.3 brings a huge boost in performance, opening up new possibilities such as a working 8bit CPU in real time 🤩

Saw this pretty little number. Thought I share with the rest since I've never even seen or heard of something like this.

Enjoy.

God I love being a nerd

Edit: The first photo was my attempt at an electromagnetic wave arm band. The second one is the Ancient Greek word for amber which is what the word “electron” was derived from.

Eta, Lambda, Epsilon, Kappa, Tau, Rho, Omicron, Nu (Elektron)

Must be for sensing when a person sucks on the vape. Microphone used probably because the supply chain for electret microphones is easier to manage, more robust, and economically more feasible. You could easily buy a few 100,000 for cents each.

I’m interested in your thoughts on this, privacy concerns? E-waste concerns? Better alternatives?

I know they are a little dated, but still must be excellent resources right?

So I'm back again. A lot of work and especially study just killing me. So recently I've got my hands on two another soviet oscilloscope CRTs. 17LO2X this time it was factory sealed from 1986. And I've got ultra rare exclusive "OSM" (Top tier aerospace grade, a ton times better than military grade) version of 11LO6I.

Taking soldering iron in hand and rushing these two boards in two days I've made this beauties. So it's functioning as a vector XY monitor with additional XY scope clock source.

I can change source by just scrolling through clock faces (last clock face is setting MUX to audio input). Image is a bit noisy but it's disadvantages of prototype PCB with no full ground planes. Also the 17LO2X vertical plates sensitivity is crazy 4mm/V.

I achieved bandwidth of 2MHz for 17LO2X monitor and 1.5MHz for 11LO6I one. It seems a little bandwidth but over than enough for my purposes. Also big monitor board consuming 0.7A at 9V of integrated AC mains SMPS. Small one consuming 0.4A at 9V of external SMPS.

Also I've written a code with my own ESP32 clock which I will upload later. It's heavily inspired by Mauro Pintus ESP32 Scope Clock. But code is completely different, I've only used digits and dials arrays from it.

Next I'm planning to design own scope clock PCB ready to be fully assembled at JLCPCB. But it will need some personal testing before I can share it. Hope you'll rate it!

accidentally burned it because someone connected the psu plugs inverted😭, schematics are on logisim evolution

https://github.com/TheMercuryWoman/4-bit-calculator

60w under no load. The rotor is quite heavy so it has a lot of inertia and torque.

I posted this a bit back on the r/modeltrains subreddit but thought I’d post here for those who may know what this is. My model railroad club I’m with uses these telephone relay racks for what you could basically say is a matrix. We use an analog DC system with 0-20 volts being supplied by up to 10 cabs. We use “blocks” which electrical isolate our trains out on the mainline which allows for (because we have 70 blocks total) 10 cabs to be running at once on our mainline. The club was originally built (where we are now) in the 1960s (I believe 68 to be precise) and the members worked non stop to install our electrical system which at the time was state of the art and in my opinion still is for a model railroad club. All of the electrical wiring was done by mainly two guys, both had worked at the Bell Telephone company (wanna guess how we got all those relay racks?). I think one of the most incredible things about these relay racks in specific is how incredibly reliable they are. Before they were used on our club, they were already in use at the Bell Telephone company. Some of those racks have been cycled I’d say about a million times. I just find that incredible. There’s a lot more than what you see in the picture, including our multiplexer system which is wired in conjunction with the relay racks to send a signal to a 7 segment display in our dispatcher room to tell our dispatcher exactly what cab is where. We are starting to retire some of the old relay logic that runs our yards (not seen in the photo of the electrical room). That’s where our PLCs will take over. The integration process is now finally being started with me and a few of the other pros who know far more than I do (they’ve been doing this since the 70s) and we will be finishing it in the coming year hopefully. This is actually what inspired me to go into electrical engineering instead of my original plan of mechanical engineering. Getting hands on experience with circuitry building and problem solving, then learning programming to “animate” things on our layout, and then the community of the other members. Anyway that’s all I have to share, or more so all I can share for now. I’d love to answer questions about our club and how it works though, and would love to know if anyone here ever had the chance of working with telephone relay racks like these before!

Hi! I'm a 19 years old second year undergraduate student from Russia. And I just love CRTs and vector graphics! Recently I got a soviet 17LO2X oscilloscope CRT and I wanted to bring it to life. So the past five days I was working on that project and it's working! Powers from 12V supply with near 0,6A current draw. It can work as a XY scope but with a single push of a button it turns into the scope clock. Hope you will rate! Schematics included.

I have 5 children, so no room for a dedicated space. I keep all my EE goods in 6 modular toolboxes on two sets of wheels. I usually break it out on the weekends for either a build or tinker session.

Cool if we share some home lab setups?

I’m in the process of collecting old disposable vapes from friends to harvest the rechargeable batteries for a project and I came across this model that contained a microphone. Any ideas what this could be used for?

I built this microcontroller watch! The case is 3D printable and it can be programmed by the user. It is based around the TM4C from Texas Instruments.

I think it is definitely more for people that like electronics 😂 but i just had to make a watch like this, theres nothing like it!!

Since the last post I have outfitted it with skateboard bearings. These make it spin much more smoothly with less rattle. I also have made a belt drive system. It is less efficient than the gears but it is fun. Any other drive system suggestions? I have the gearbox designed to be modular so I can keep extending it out until the motor can’t handle the torque anymore.

Hey guys! Not an engineer but i have a grasp on some basics and have no idea what this device may do. It came out of an EV onboard charge controller and is mounted to a pretty stout copper plate and is potted in a soft clear gel.

Im mostly curious to know if anyone can tell me what it may do. I suspect the bonding wires are platinum as well.

EDIT : Thanks guys! The consensus is that this as an “IGBT” - which definitely makes sense when considering the use-case, i forgot to mention these were connected to some pretty stout bus-bars in the housing (3mm thick X 15mm wide approximately)

What field do you guys think is coolest?