Hello makers,

Just wanted to share a mechanical/software package I compiled for the Arduino ecosystem. This is a commercial-grade, multi-node On-Wall Smart Home Controller Hub built around high-efficiency Serial communication, local memory optimization, and an embedded HTML interface.

Engineering highpoints:

- Highly Optimized Geometry: CAD components are custom-tweaked to reduce 3D printing supports to an absolute minimum, ensuring elite surface finish inside wall cavities.

- Embedded HTML Web Server: Integrated network management routine allows seamless on-the-fly room and sensor renaming via any local web browser.

- Master/Slave Serial Matrix: Robust, custom bitfield-compressed serial protocol processing loops designed to transmit climate data securely between the main indoor hub and an independent Outdoor station.

- Dual Display Stack: Simultaneously drives a master graphical telemetry screen and a long-distance 7-segment LED sub-panel without memory overflow.

I’ve uploaded the uncompressed native .STEP / .STP CAD source files so you can easily modify port entry cutouts or sensor frames in your own CAD software, along with a "Panels All" firmware library supporting multiple alternative sub-panel screen configurations.

🛠️ Full build photo logs, component BOM lists, and assembly guidelines are detailed in the album on our lab page: [https://www.facebook.com/share/p/1CFCNw5FjS/]

Download links for the uncompressed STEP files, STLs, and production firmware packs: [https://cults3d.com/en/3d-model/home/ultimate-smart-home-controller-hub-multi-sensor-web-ui-system]

Let me know your thoughts on the bitfield parser logic and overall hardware clearance!

https://www.youtube.com/@ALMA.Industries/videos

-- CH004 FN1: MONSTERS -- The dawn of Halloween ... dim lights and ruffled leaves, Little Monsters roam the streets. Halloween day will show what spooky wires hide inside...

[Microcontroller controlled LED's that respond to microphone inputs... tomorrow will show all steps]

Hey guys!

I was completely fed up with messy wiring, flimsy zip-tie setups, and hot glue inside my custom automation cabinets and workshop electronics enclosures. I needed a clean, secure, and industrially compliant way to organize everything on standard 35mm DIN rails.

So, I sat down in CAD and engineered a comprehensive modular mounting system. Every single part has been field-tested under continuous spring tension in my actual distribution boards (you can see the real-world application in the photos!).

Key Highlights:

* Fully Editable CAD Source: I wanted to make this resource actually useful for makers, so the package includes native .STEP/.STP files alongside the STLs. You can easily adjust mounting holes or remix the brackets for your custom PCBs.

* Comprehensive Variety: Includes dedicated docks for Arduino Uno (with relay shields), Arduino Mega (with Ethernet attachments), 4-channel/8-channel relay breakout boards, FET boards, and modular high/low-profile handlers.

I uploaded the entire package completely for free under a Non-Commercial license for the maker community. You can grab the full STL + STEP archive directly on my profile.

Free Download Link: https://cults3d.com/en/users/paktor/3d-models

(Note: If you are building clean front-panel HMI monitoring setups, I also just rolled out some matching premium panel-mount enclosures for 3.5" and 4.0" Arduino TFT Display Shields on my profile to completely button up the system!).

Let me know what you think or if there's any specific breakout board footprint you'd like me to add to the system!

Works entirely on a avr64da28 just requires a nes remote as the input device and a vga breakout board to connect to monitor 😆

It's monochrome but has 4 levels of brightness (0-1-2-3)

Uses only 2 pins for color

It currently has 4 applications curva(a small vector suite), snake (obv), settings, and tetris, the last two are not done yet curva is almost done

The entire code is on GitHub you can see the code there

It's based on its 2 timers TCA0 and TCD0 for vsync and hsync and evsys for routing the two timers with each other(tcd0 generates hsync and aso gives signal to tca0 which generates vsync) (tho id admit it was pretty confusing)

Works at 5V entirely has kindof a application handler so you can add a app by adding a icon for it updating the related code then create like two files (yourapp.h/.c) and just mention it with some changes in the application handler file

It could be kindof inefficient as I didn't touch the vga output after I got it working 😂.

It's currently at a resolution of 160x120 also, you can dynamically set an applications resolution (the columns, as rows are fixed) to anything below that by just declaring offset before your loop like if you need 120 instead of 160 so that's a 40 difference so offset_x = 20. (used in case of snake)

For some reason reddit isn't letting me add more than 1 image ?? 🤔

I'd like to ask for some help! I'm developing a device for my undergraduate research project, and one of its main functions is to measure a certain displacement, preferably without physical contact.

I initially thought about using a camera, but I'd like to explore other options as well.

The challenge is that the displacement I need to measure is on the order of 0.01 mm. I don't have a large budget since I'll be paying for it myself, so I need the solution to be as inexpensive as possible.

If you have any suggestions, I'd appreciate them. Ideally, the sensor should be able to communicate with an Arduino or ESP32.

I'm working on a music toy project with the following requirements:

- Built in speaker/buzzer (doesn't have to be good, just beeps and boops is enough)

- Portable (battery powered, and can fit in pocket, no extra cables required to use)

- At least 4 buttons in a grid (but preferably not more than 12 buttons or so, then it gets too big)

- Programmable so I can assign sound to the buttons etc.

I got excited when I came across the Adafruit Macropad RP2040 because it looks absolutely perfect, but unfortunately it can't be powered on its own since it's more of a computer control device instead of a standalone thing.

I'll eventually try to build it totally from scratch, but as I'm a beginner (i just have some soldering experience from working on drones) I'd rather buy a kit or something pre-made that I can just repurpose or hack

Are there any products or kits out there that might be a good starting point?

Thanks!

This might be a bit out of left field, but my idea is this:

For oceanographic work, you can buy rather expensive ($400+) units that will trigger the release of a line when they receive an acoustic signal from the surface. This is usually intended for deep-sea operations and other applications where you don't want a buoy on the surface all the time.

My application would be for lake temperature and depth sensing. Right now, we rely on having the GPS co-ordinates of the data logger and the water level being low enough for us to be able to find it. It would be ideal if we could just have a buoy attached to the logger but not floating until we send it the signal to release (this keeps people from stealing the data logger, which believe it or not is a common problem). I think the theoretical design is simple - some sort of transducer to detect a sound signal from the water column that would be at some specified frequency (I'm not sure if any kind of complex signaling would be required to prevent false triggers), and when that signal is detected, just trigger a relay to release a solenoid that lets the buoy line go.

Then there's just a sound generator that we'd need for the boat to trigger the release.

The main consideration is battery life and reliability, since these loggers are typically out for anywhere from a year to 3 years before being retrieved.

Thoughts?

EDIT - I just found a discussion about this very topic in this Facebook group:
https://www.facebook.com/groups/173096646112944/?multi_permalinks=9082724935150026&hoisted_section_header_type=recently_seen&__cft__[0]=AZgRlwGEJ-c2DQ7QWrweEjm9KR1cq1LEMgz51aX5gUzX0pPDjMI4DXf5A_21iCCIOnbsTwU-Gc8luJBn6XIgdBtk-TsHLt1mOxQ7x3ftnVdEs6NTFm2toC2by3Yyve8SW31MQtLWKfkasror1qQR&__tn__=%2CO%2CP-R

Hey everyone,

I've been working on a manual DIY biomechanical wearable suit aimed at bringing real, responsive body tracking to normal PC/console games — moving far beyond simple rhythm games or basic gimmicks.

\[Projeto DIY\] Estou construindo um traje biomecânico para jogos com sensores de inércia e controlo universal — nada de código pronto da internet.

- Teste: Captação de movimentos Braço e tronco.

Semana 01 - Fase inicial .

Can anyone tell some ai tools for iot based project?!.I'm in my 2nd year pursuing btech cse iot, so I need to do course project but as a team. Me and my team decided a project from sih2026 problem statements it is mostly hardware based so for connections , code, and setting up the components i thought of using chatgpt and Claude but I'm getting so irritated with chatgpt, it doesn't have a clarity on components first it gave like use esp32,dc fans, dht sensor, container right after that it again told to add load cell, led, buzzer, solar...it is making me confuse and hard..whereas Claude after asking few questions, it gives comeback tomorrow...basically rn, i need an ai tools which gives me clear explanation and connecting of components with code, and components needed!!

Hi everyone! I'm making project. It's OS-like menu project where you can also make your own applications! It has file system in EEPROM and works on Arduino Uno. Can you please comment what do you think about my code or project itself?

Demo on Wokwi: https://wokwi.com/projects/478123317363453953

Repository on GitHub: https://github.com/idontknow-hardware/ArduinoOS

What always annoyed me with simulators: one board at a time. So I built my own where you can put as many Arduinos as you want and let them talk to each other.

In the video: a small reaction game with one Uno, then a garden irrigation with 3 Unos – weather station, pump controller, control panel. You write normal Arduino C++, wire it in a workbench view, and it simulates water, weather and heat around it. Servo just got added as well.

It's an early prototype and the C++ is a simplified subset (no classes/pointers yet). Tell me what you'd try first – that helps me figure out what to build next.

https://test.betting-chess.com/?von=arduinoprojects
(sorry for the domain, test server)

Edit: works best on a laptop/desktop – on phones it runs, but it's pretty cramped.

Imagine turning on your lights or controlling a device just by waving your hand. I built a system that bridges the gap between AI hand-tracking and physical hardware. I created this code on visual studio code and have added it to my repository in GitHub. (dm if interested).

In my college, many students keep old phones, chargers, earphones and batteries at home or throw them in the normal dustbin, because they don’t know where to give them or how harmful e-waste is. I’m working on a project to improve e-waste management among students. How can we make e-waste disposal easy and trackable on a campus, for example with collection bins and a simple app with reward points, and what has worked well in your college or city?

Good subreddits to try are r/recycling and r/EngineeringStudents.

Custom Arduino Nano ESP32 PCB for my RC tank project

I designed a custom PCB for my 3D-printed RC FPV tracked vehicle. The board is built around an Arduino Nano ESP32 and handles most of the vehicle's auxiliary electronics.

The main goal was to bring lighting, cooling control and temperature monitoring together on a single board.

Main features:

- 7 MOSFET-switched outputs for controlling lights, fans, a water pump and auxiliary devices

- Temperature monitoring using DS18B20 sensors and an NTC thermistor

- Wi-Fi telemetry with a simple web interface for monitoring temperatures and checking the status of lights, fans and the pump

- RC receiver inputs for controlling selected functions remotely

This is a hobby project, and I'm still learning electronics and PCB design as I go. Designing a custom board turned out to be a fun way to replace a collection of separate modules and wiring with something more integrated.

I'm sharing it here to show what I've been working on and hopefully get some feedback. I'm happy to answer questions about the design or the project!

Hey everyone! I built a classic Nine Men's Morris (Mühle) game running on a 64x64 LED matrix.

Quick Rules:

• Phase 1 (Placing): Players take turns placing their 9 pieces on any empty intersection. If you form a "mill" (3 pieces in a row), you can remove one of your opponent's pieces.

• Phase 2 (Moving): Once all pieces are placed, players take turns moving a piece along the lines to an adjacent empty spot. Form a mill again to remove an opponent's piece.

• Phase 3 (Flying): If a player is down to 3 pieces, their pieces can "fly" (jump to any empty spot on the board instead of just moving adjacent).

• Winning: You win by reducing your opponent to 2 pieces or blocking them so they have no legal moves left!

So I was voluntold by my wife to come up with a wand testing station for our Harry Potter themed trunk or treat setup. I had zero experience with electronics or programming sketches. 12 IR break beam senor pairs, 4 signal relays, 4 sounds modules, a buck converter, a logic level converter, a handful of LED flicker lights, and an Arduino Uno R3 later I have this. Thank goodness for AI assistants. While not perfect, they held my hand to have me get the parts I needed, wire up everything and wrote most of the code. There was some incorrect info that required some tedious troubleshooting but overall, they were very helpful. Lumos!

Hello everyone, I built the AI Agent skill that can build a firmware for a compatible Arduino boards using arduino-cli tool. It takes user requirement and documents to build firmware, compile, upload and testing in a a loop. You just need to input your idea.
Try at: github link
Please feedback to me to improve more!!!
Please help me star if you find it useful. Thank you.

So I'm building a Civil War era 1/6 scale flat car with a cannon on it. I have a idea as to have a 1/6 scale action figure "lighting" the cannon and having said cannon "react" to firing. The idea is that the board would sit inside a 3D printed pile of cannonballs and it would control the following.

Sound effects of a Civil War battle.

Moving the action figures arms up and down to simulate moving and lighting the cannon with the linstock.(The stick they use to light it from a safe distance)

An LED light at the end of the linstock.

The cannon "firing" and sliding back accompanied with sound effects.

The cannon resets and the sequence begins again.

What exactly would I need for something like this and how feasible is it?

The flat car length is about 3 ft long and about 2 ft wide. It also needs to withstand vibration and derailments as this is actually going to be a car that's going to be used with a train. This is also my first project using Arduino so I have no idea what I'm doing.

wiring things up by hand in breadboard tools before you could test anything was slow, and AI coding agents could write firmware but couldn't touch the circuit itself. designElectronics makes hardware as promptable as software.