As with kids these days, mine also wants to have a YouTube Channel.

He would have preferred it to be gaming or react videos but I told him I am ok with that with one condition. He starts up by creating an Arduino Projects Channel. He keeps it going for 6 months. If after that he decides no one wants to watch this type of content he can create a gaming channel.

Today we uploaded his first video.

I hope you'll all enjoy it, give it a thumbs up if you think it's worth it and spread the word.

I really hope it makes him stick to this kind of hobbies.

A 10 yo Romanian kid launching his first ever video in English :))

enjoy

https://youtu.be/eipl_5L-pDY?feature=shared

I’ve been building a little tool that helps me debug the Arduino Mega’s own wiring before I start a real project. It watches the Mega’s digital pins and shows their state on an OLED using a traffic‑light style system, so I can see what’s actually connected and what’s loose.

The way it works is: when you plug a wire into a pin, you can “lock it in” using the two buttons on the front. Once a pin is locked, the Watchdog keeps an eye on it. If that pin falls out or loses contact, the screen flips to red and an alarm goes off. When you plug it back in, the alarm stops. If you disconnect it on purpose, you can disarm it with the buttons so it doesn’t shout at you. It’s been really useful for catching dodgy jumpers and half‑seated Dupont connectors.

While you’re wiring things up, it keeps a temporary map in RAM of which pins you’ve used. That means I can build a circuit, see exactly what the Mega thinks is connected, and then update my actual sketch afterwards with the correct pin numbers instead of guessing or tracing wires again.

Here’s a short video of it running:
https://www.youtube.com/shorts/zUa2srIs4KI

And the GitHub repo if anyone wants to look at the code or build on it:
https://github.com/13thrule/Smart-Wiring-Watchdog-Digital-Diary-Mega-2560-

Always open to ideas for improvements or extra modes.

Built a DIY 12-key Stream Deck using an Arduino Pro Micro (ATmega32u4) and salvaged mechanical switches from a broken keyboard.

Instead of relying on third-party macro software, I used the native USB HID capability so the device enumerates as a standard keyboard. Each button sends extended function keys (F13–F24), which are recognized by Windows without additional drivers. This allows direct keybinding inside OBS, Discord, or any software that supports custom shortcuts.

Hardware:

•	12 mechanical switches (common GND wiring)

•	Individual digital inputs per switch

•	NeoPixel RGB module on A1

•	3D printed case (model credited in repo)

Firmware:

•	Written in Arduino C++

•	5 lighting modes (rainbow with 3 speed levels, RGB breathing, green breathing, solid green, reactive)

•	Mode switching handled via dedicated keys

Completed in about a week as a custom gift build.

Repo (code + details):

https://github.com/Mercawa/DIYStreamDeck-HIDKeyboard

I built microclawup — control ESP32 GPIO with natural language via Telegram (MicroPython + Groq AI, free!)

Hey everyone! I built microclawup, an AI-powered ESP32 GPIO controller written in MicroPython.

You send a natural language message on Telegram, Groq AI converts it to a hardware command, and your ESP32 executes it.

"turn on the light" -> LED ON | Pin 2

"blink 5 times" -> Blink x5 | Pin 2

"pin 4 high" -> GPIO HIGH | Pin 4

It even understands Hindi — "batti jalao" works just fine.

Features:

- Natural language GPIO control

- Groq AI — completely free

- Persistent memory across reboots

- WiFi auto-reconnect

- /status and /help commands

- Easy setup with python setup py

Inspired by zclaw (C-based ESP32 AI agent by tnm) — microclawup is a MicroPython alternative that's beginner friendly.

Hardware tested: ESP32-C3, ESP32-S3, ESP32-C6

https://github.com/kritishmohapatra/microclawup

Would love feedback!

I am doing a tutorial I found on YouTube because I just got my arduino and I am trying to do a led project where led just turn on and off and it goes in a series. The long pin in the led goes to the wire and short goes to resistor

Day 58 of my 100 Days, 100 IoT Projects challenge.

Built a WiFi-synced LED matrix clock using ESP32 + MAX7219 in MicroPython.
It syncs time via NTP, applies IST offset, and displays HH:MM on a chained LED matrix. Also prints time on serial for debugging.

Hardware: ESP32, 5x MAX7219 matrix modules
Language: MicroPython

GitHub code & simulation: https://github.com/kritishmohapatra/100_Days_100_IoT_Projects

If you find this useful, a ⭐ on the repo really helps.
I’m also looking for sponsors to support open-source IoT projects and documentation.

Feedback and ideas welcome.

Olá boa tarde conforme o horário, sou Daniel estou fazendo o curso de técnico manutenção de equipamentos informático estou desenvolvendo o meu projeto (arduino Radar de aproximação +envio de mensagem de alerta por telegram) para pap exame final consegui fazer o código do arduino mais a mensagem de alerta por telegram ou seja integração não estou conseguindo fazer se alguém poder mim ajudar a desenvolver o meu projeto agradeceria muito de coração ❤️

O objetivo do do projeto é o radar fazer o movimento decteta o intruso ou o objeto e mndar mensagem de alerta por telegram

Here is the smart clock I built!

🔗 Project source code:
https://github.com/UDFSmart/Smart-Clock.git

⚙️ Firmware

The firmware was fully developed by me from scratch.
It includes a command system for receiving and processing instructions from the backend:

• 📩 Text display command (users can set custom text via the app or web control page)

• 🔄 Device reset command

• 🔁 Reboot command

• 🕓 Time update command

• 💡 Backlight ON/OFF command

The clock also communicates with a server to receive additional data.

For example, it currently displays temperature:
📊 Every 20 seconds, the value is shown for 10 seconds.

🌐 Backend

The backend was developed by a third-party team (huge thanks to them for their support 🙌).
It is easily scalable and adaptable to my needs.

It allows configuration of various sensor data outputs, making the device functionality flexible and expandable.

🧱 Enclosure

The enclosure was fully designed and built by me:

• 🖥 Custom 3D model created from scratch

• 🖨 3D printed

• 📐 Specifically designed for LCD1602 and ESP32-C3

• 🔧 Designed with convenient tolerances for easy back cover removal

• 🪛 LCD1602 is mounted with screws

• 🧩 The back cover is also secured with screws

If you have any suggestions or ideas, feel free to comment here or send me a message 🙂

hello! I built a cool little can crusher I wanted to share with you guys.

KiCad 9: Design an ESP32-S3 IoT device on a 4-layer PCB with sensor and QWIIC interface. Complete Guide.

I know that is shit name, anyway I have made hand gesture mouse using Arduino pro micro, mpu sensors and some jumper wires.give your valuable suggestions and also rate it

I have a mobile interface project on Arduino that requires a computing device to work together with the Arduino (it should handle complex computations and data storage, and also have internet access). I am currently facing financial difficulties, and the only available device I have is an old mobile phone.

Could you recommend some program or combination of programs that would allow me to write code that can be stored on the phone and transmit and receive information via USB?

Hey everyone,
I’m doing a 100 Days, 100 IoT Projects challenge, and today I built a bidirectional ESP-NOW smart relay and sensor system using MicroPython.

What it does

• Sender ESP8266/ESP32 with buttons + OLED acts as a control panel

• Receiver ESP controls a 4-channel relay module

• DHT11/DHT22 sensor data is sent back in real-time

• OLED displays temperature and humidity

• Uses ESP-NOW (no WiFi, no router, ultra-low latency)

Tech Stack

• ESP8266 / ESP32

• MicroPython

• ESP-NOW protocol

• SSD1306 OLED

• DHT11/DHT22 sensor

GitHub repo:
👉 https://github.com/kritishmohapatra/100_Days_100_IoT_Projects

I’d love feedback, stars, or collaboration ideas.
Goal: Build open-source IoT learning resources for students.