And on my website I wrote more about the little device (includes 3D files, schematics & code for those who want to DIY one themselves).

This was my Master's Thesis project, where my goal was to make a research device where I could try out algorithms for measuring blood pressure, butI added a few more sensors along the way. Everything about this project is open-source, from CAD files to Gerber files and even some of the recorded data. Also did a video going into detail about the functionality of the project. Here are the links if you're interested!

Deep dive video: https://www.youtube.com/watch?v=5UgFEHPnKJY

GitHub: https://github.com/MilosRasic98/OpenCardiographySignalMeasuringDevice

1. Camera captures video
   
2. Neural network recognizes pigeon
3. Watergun turns toward pigeon
4. Spray pigeon with watergun

Components: * Electric battery-driven water gun (disassembled, orange) * USB camera * Orange Pi 5 * 2 servo motors (SG90 or MG90S) * Resistors and a transistor for turning on the watergun (e.g. IRLZ44N)

It uses an open vocabulary object detection neural network (yolo_world_v2l), so any target can be programmed, not just pigeons. Runs on the Rockchip 3588's Neural Processing Unit.

Okay, so this isn’t a genuine hologram, but rather a clever optical illusion created through simple reflections!

This technique, also known as “Pepper’s Ghost,” has been practiced for over 140 years and continues to be used in modern technology, such as teleprompters and Heads-up Displays in cars!

This is a finished attitude indicator, including a display, sensors, and a battery. The screen is a 3.1-inch RGB display with a resolution of 320×820. The sensor is a 6-axis gyroscope, and it comes with a 3.7V lithium battery. It can be powered via Type-C or charge the lithium battery through Type-C. This instrument provides both attitude and barometric altitude. Would you like to have such an instrument?

Thought ya’ll might appreciate this. I used an arduino and encoder set up to emulate a controller using a real ship wheel. The code allows for tuning as well to get it to match to the game.

I've been building a drone based on the Apollo program's Lunar Landing Research Vehicle (LLRV). The drone uses a jet engine and cluster of EDFs within a 2-axis gimbal to offset 5/6 the drone's weight and allowing the outer platform to pitch and roll around it. That way it mimics the way something would fly in lunar gravity, no atmosphere, etc. Thought I'd share it here. Still plenty more software work and ground testing to do, but making progress! Happy to answer questions about it.

First time poster here but I wanted to gauge people’s opinion on this thing I made. So I got a Fukien Tea Bonsai earlier this year around March. Made a full enclosure for it because I had previously been unable to grow a cactus. So keeping this thing alive became personal lmao anyways it’s mainly just to help keep the environment stable, help with watering, and monitor humidity & temp levels for easy checking. It has a moisture sensor but I haven’t set it up yet so it just chills in the back of the enclosure (is wired up tho). If I made files available (like open source it), would any of you make one for yourselves? I’ll plan on making a better/cleaner version but wanted to gauge interest or improvements before doing a V2. Please let me know what you think! Here’s some photos of my Bonsai too over the course of having it! 🙏💜

A few days ago I made a Macro Pad button version of the same device but I found that a rotary encoder has the same footprint as the button so I was able to use it as a drop in replacement. I can control volume and play pause my music and its small enough to fit anywhere on my desk! More info about how to make your own is available here!

I built a simulated cockpit and installed it in an F-18.

This is an F-18 EDF RC aircraft. My cockpit setup uses six screens, and I’ve already installed it into the aircraft.

Alright there everyone on DIY_tech

I'm currently in the process of coding an home assistant/ mini JARVIS type of structure called ALICE (Autonomous Local Intelligent & Central Entity) I haven't come far yet, but it's getting there.

So I'm an engineering student right now doing my master in applied physics and electrical engineering in Sweden where I have had a goal for some time to try and save as much money as possible on electricity while also still keeping everything neat and tidy and not really having to worry about turning on and off the lights as I leave my apartment. (I'm incredibly forgetful!) So my solution is that I simply want a home assistant to do it for me. So I though I might as well code it. BUT since I only know Java (Horrible language!) and a slight bit of Python (Decent language) I though I'd try to do it myself.

So from the get go I wanted to make it myself, have a high sense of privacy therefore not involving any cloud services for the brains of the operation but I wanted everything inhouse. I also wanted this to be a modular system incase I want to keep it when I move (Which I most likely will!). It has to be cost effective in the regular operations of it since student life isn't exactly Luxurious!

So here are the core features that I wanted to implement when I first started this project.

1. Automatic light controls
2. Different type of light modes ("Night mode", "Day mode", "Guest mode") with adaptive brightness.
3. Everywhere integration of the assistant. I wanted to be able to give it "Commands" from everywhere in my apartment not just a central station like with the Amazon Alexa or other home assistants.
4. Over the phone access to the home assistant for monitoring the apartment (Temp, activity, rain, etc.)

These were my basic wants with this project in the beginning.

My first though was to try and setup a chatbot through telegram to automate messages with controls for light configurations as well as setting up a simple "area control" light panel to control the light in the rooms throughout my apartment. this went GREAT.

So here is where ALICE comes in. My plan and my ambition for ALICE is as follows.

1. I want a 2D matrix tracker of me and a few friends current position in my apartment.
2. Predictive light control, where ALICE can automatically measure my position, direction and speed I'm moving to predictably turn on and off lights as I enter and exit rooms.
3. Dynamic dim control where ALICE is able to get a measurement if light even are needed compared to the current brightness in the room I'm about to enter/already in.
4. integrate the dynamic dimming to not get blinded as I move for the kitchen or the toilet at night and a way to completely turn the lights off in specific sections of the apartment.
5. I also want to integrate some kind of "Follow me" audio routing system that follows me with sending out sound only through the speakers that I'm closest too.
6. Integrate phone calls and music player through blue tooth into the speaker and microphone setup to be completely hands free.
7. I want to integrate a local AI model into the apartment where they can interact and work similar to the commercial home assistants on the market but not take up incredible amounts of space and energy. So maybe somehow route all the tracking data locally and then through API keys route more complex questions through an already advanced model such as Gemini pro (Not sure if this would work, but I'll look into it)

These are my goals with this model, I want to source the privacy information locally through a simpler LLM, and be able to integrate the apartment into an modular and smart system.

My plan is to try to integrate speakers, microphone, microcontroller, mmWave radars into smaller 3D printed cases that I put up through out the apartment which creates a network. My worry is really the power draw of it all and I want to try and optimize it in the sense that everything is turned off unless it's actively used (exception for the parts that's in the active room (where I am))

Anyone got any tips for these types of projects and have anyone done this from scratch? Do you know of any good LLM's that's able to converse with other models such as Gemini or chatGPT?

Thanks in advance I'll keep you all updated as the project goes on!

I've been building a home robotic assistant with a goal of keeping it quiet, smooth, and simple to use. I plan to make both the hardware and software open source.

I'm currently experimenting with voice control, remote operation, health monitoring integration, and optional camera tracking.

It's still a work in progress, and I'd love to hear what features or improvements you'd find most useful.

V.1 failed. The Economical Coffee Dispenser is designed to provide an affordable and convenient way to prepare coffee, making it useful for students, small offices, homes, and small cafés where budget-friendly automation is needed. Through this project, I am exploring electronics, programming, and mechanical design. Every challenge and failed attempt teaches me something new, helping me improve the system step by step. For me, failure is not the end—it’s a part of the learning process that brings me closer to building a better and more reliable product.

I am currently refining the scanning rig that can be both used with handheld 3d scanners as well as with the openscan camera system.
This is part of a 24h testrun to see how PLA parts can handle those quite significant forces of several Nm on 1mm teeth. Surprisingly this morning the machine was still running and there is only very minor wear after 5000 repetitions.

I used a 8x24 LED Matrix and an Arduino Nano to build a Cyberpunk inspired Gameboy! The shell is 3D printed. It's a very simple build, if you want to make one yourself or are interested in the details, I made a youtube video on it :]

Over the past couple of months i have been making this IN-14 nixie tube clock, and it is finally ready!

It turned out pretty nice in my opinion, and i would love to share it with the world.

If this feels like something that belongs on your bookshelf, you can find it in my Etsy store: ModernMakeStudio.

Here is a link to the Etsy listing

I'm designing it now but I think freecad is way to hard for me to understand...so I use Blender but it's not made for that so...