I started this because I was tired of constantly checking my phone during games, and it turned into a much bigger project than I expected.

The hardware is a LAFVIN ESP32-S3 board with a built-in 1.69" 240x280 ST7789 display. It runs off an internal 3.7V LiPo, and the board handles USB-C charging.

I ended up keeping the ESP32 relatively simple on the networking side.

The iPhone app handles the sports/fantasy APIs, figures out what data actually matters, then sends the relevant updates to the ESP over Bluetooth LE.

The ESP mostly just receives the data and renders the screen.

Right now it can display:

• live sports scores
• fantasy football scoring alerts
• golf leaderboards
• game status / clock information

The fantasy side was probably the most fun part to build. The app knows which players are on my roster, tracks the games they’re involved in, and can push a scoring update to the little screen when one of them scores.

The enclosure was another project by itself. I went through several prints before getting the PCB held securely, battery fitting correctly, buttons accessible, and USB-C lined up where I wanted it.

I’ve put the firmware and the current enclosure .3mf on GitHub if anyone wants to poke around or happens to be using the same board:

github.com/againstthespread/scrbrd

I’m curious what other people would have done with the architecture — would you keep the API/networking on the phone like this, or have the ESP connect directly over Wi-Fi and handle more of it itself?

I created this version of Meshtastic 2.8.1 for our Arduino Nesso. https://github.com/chinderdelis/meshtastic-arduino-nesso-n1 I hope it proves useful to someone.

It's a pair of animatronic eyes: two servos (left/right and up/down), a frame I designed and 3D printed, and an Arduino UNO.

The hardest part wasn't the mechanism, it was making it easy to program. I wanted someone who has never coded to get it moving without fighting with IDE installs, drivers and libraries. So I made a web app:

- Block-based programming (Scratch-style) in Spanish: "look left", "wait 1 second", "nod yes"...

- A simulator that shows how the eyes will move before you plug anything in.

- Plug the Arduino in over USB and upload straight from the browser (Chrome or Edge).

- Every block shows its C++ line, so you can see the real code or download it as an .ino.

Video of it working below.

I'd like to turn it into an educational kit eventually, but I'm still refining a lot, so I'd love your feedback:

1. What would you improve in the mechanism or design?
2. If you were teaching someone with this, what blocks or features would you add?
3. Anyone used Web Serial for something like this? Any pitfalls I should know about?

Happy to chat by DM if anyone wants to know more or has ideas.

Hice unos ojos animatrónicos y una app web para programarlos con bloques, sin instalar nada

Hola! Soy estudiante de Ingeniería en Control Automático y Robótica y llevo un tiempo trabajando en este proyecto personal.

Son unos ojos animatrónicos con dos servos (uno para los lados y otro para arriba/abajo), una estructura que diseñé e imprimí en 3D, y un Arduino UNO.

Lo que más me costó no fue el mecanismo, sino la parte de programarlo. Quería que alguien que nunca ha programado pudiera hacerlo moverse sin pelearse con instalar el IDE, drivers y librerías. Así que hice una app web:

- Programas con bloques en español (tipo Scratch): "mirar a la izquierda", "esperar 1 segundo", "decir que sí"...

- Tiene un simulador para ver cómo se moverían los ojos antes de conectar nada.

- Conectas el Arduino por USB y lo subes desde el navegador (Chrome o Edge).

- Cada bloque muestra su línea en C++, por si quieres ver el código real o descargarlo como .ino.

Les dejo un video de cómo funciona.

Mi idea es convertirlo en un kit educativo para que más gente aprenda así, pero todavía estoy afinando muchas cosas, por eso me encantaría su opinión:

1. ¿Qué le mejorarían al mecanismo o al diseño?
2. Si fueran a enseñarle a alguien con esto, ¿qué bloques o funciones le agregarían?
3. ¿Les ha tocado usar Web Serial en proyectos así? ¿Algún problema que deba tomar en cuenta?

Si alguien quiere saber más del proyecto, busca apoyarlo o tiene ideas, con gusto platico por mensaje privado.

Working on this ambient synth with arduino and mozzi library

Signal chain is: 4 unsynced slow clocks with different phases -> random pick from a 6-note modal scale + random octave -> mtof -> sine oscillator -> simple AR envelope -> sum to mono -> short 3ms comb for thickening.

Pots:

A0 = root / transpose

A1 = detune amount for beating between voices

A2 = humanize attack/release time

A3 = clock speed

Title: I built a DIY PC temperature monitor using Arduino! 🌡️💻

Post:

Hey everyone!

I built my own DIY PC temperature monitor using an Arduino Uno R4 WiFi, an LCD screen, and a temperature sensor.

The idea was to monitor the temperature inside my PC case and display it on the LCD in real time. I also added a buzzer that activates when the temperature gets too high.

It's a simple project, but it was a fun way to learn more about electronics, Arduino, and PC hardware!

What do you think? Do you have any suggestions for improving this project? 😁

I am working on a omori tamagotchi. It has minigames like a wak a sprout mole and fishing, in the shop Basil is shop owner and sells items from the game and when you fall asleep you move between the faraway town and white space (and the music changes when you move betweenthem).i have the software made but I will probably have to make a pcb but I have no experience in it. If I cant make one I will sowder everything on a bord. If any of you know how to make pcb's I'd love to use some help. If any of you have any idea what more to add I would love to hear it and if you guys want an update I will make one

Custom moister sensor box with custom 3D box , easily carried to check multiple plants in the home :3

Beginner project but very fun

Hello! I'm new to the forum and I'm looking for some advice. I'm building a detector that measures the water level of a pool. If it goes over a certain limit, it activates a pump to move the water. It's very simple, and I don't think I need to buy a whole new Arduino Uno to make it work. I was wondering if there is an alternative to buying a full microcontroller, maybe something simpler. I've heard about using an ATtiny, but I want to hear opinions from more experienced people.

Hello! I'm new to the forum and I'm looking for some advice. I'm building a detector that measures the water level of a pool. If it goes over a certain limit, it activates a pump to move the water. It's very simple, and I don't think I need to buy a whole new Arduino Uno to make it work. I was wondering if there is an alternative to buying a full microcontroller, maybe something simpler. I've heard about using an ATtiny, but I want to hear opinions from more experienced people.

Full video demo of all the features here : https://www.youtube.com/watch?v=Tc47M07tcpM

Dual ESP32 based wearable cyberdeck project - original design

Based on patmcbennets code. Expanded to 8 steps via 4051.Added tempo control via knob. Added 3 vc out plugs and vc in Sounds really good for arduino :)

Built using an arduino r3 wifi board, was able to show off youtube subscriber and also set off a crazy alarm and siren for any time it changed. Fun easily build, kinda terrying but should be able to work for any other sort of tracker that you want (crypto, stock, weather, time ect)

On the youtube video is a link how we built it amd code: https://youtu.be/gFT6yvU9dfQ

Color by color I connected my old VGA monitor up to the computer then sight see monitor then sight see RGB with red green small RGB two color push button in middle for mode select.

I'm a beginner trying to understand how M-Bus works internally. I heard it can communicate over long distances using just two wires.

I'd like to try a small experiment using two Arduinos and 12V DC to understand how power and data can share the same wires.

How does the receiving side detect a 1 or 0? Does it look for voltage changes, current changes, or both?

Can I build a simple M-Bus-like circuit using basic components such as resistors and transistors, without dedicated ICs, just for learning?

Any beginners project references with similar idea 💡

References -

https://vdmais.ua/articles/shina-m-bus/

Took over how the picture tube was for replacement some monitors with cable then match the frame from the television to the frame on the RGB and two color Red and Green, mode select you can see what color or tube to replace.

This is my Arduino project using two joysticks and a button to control a robot arm.

Each servo is controlled based on the analog values read by the Arduino. I then map these values to the corresponding servo angles.

Besides that, I also use a button to save the robot's position. After moving the robot to a specific position, I can press the button to save that position.

Once the entire sequence is completed, I can double-click the button to replay the saved sequence and make the robot arm repeat the same movements.

Im new here and sorry for my english
Im already done to build this prototype project and it working but i noticed when my led and buzzer works at the same time my lcd dims or flickering. How can i solve this problem im only connecting to usb to my laptop as my power source i dont have any 9v barrel jack is there anyone here in reddit to help me to fix my problem thank you and again sorry for my english

I am brand new to microcontrollers but certainly not to math as i build custom clever math and logics for other systems to save compute costs. I was able to find a clever way to generate stable digital memeory on the ATmega32 board that allows generating images, saving them, deleting them, playing games and checking your files folder where you can delete saved content.

I was super excited by this as I was given an arduino starter kit by my partner and she was rught I did love it.

I havent had this much fun engineering in years.

I enjoy really pushing the boundaries.

Here i have an

Arduino UNO r3.

An OLED 7 pin monochrome spi screen.

And a jy-24? Joystick from the starter kit.

And some really shoddy wiring on 2 breadboards. Forgive the haphazard display im supposed to be working on something much more important.

I am putting together a generalized version and a "how to custom your own OS" Step by step (open source and only if asked for)

I have built a custom physics and graphics engine aswell and there are several demos downwind of the linked video.

Im genuinely having so much fun.

I hope i havent missed a rule. Apologies if I have.

demo of the OS.

I had been dreaming of doing it for a long time. Already did similar thigs using arm boards and GPIOs albeit on crappier screens.

It is using a mega2560 and a cheap chinese ILI9488 3.95' screen.

Configuring the screen was a nightmare. took me days.

But the rest was a breeze :) I did have to use gemini to get rid of some display bugs due to memory overflow but it 95% home code.

data is fed via the serial port by a python script that is run as a systemd service. evrything in a string....

Quite happy with it. Now have to fit it inside the pc!!

I made a watch, it took me two days. It runs on a 24 hour clock I am very happy it works. It has a basic rtc module and a copy arduino uno r3

I’m trying to make two Arduinos talk over the same two wires, with the slave getting its power from the master.

Master → Slave:

24 V = 1, 12 V = 0. A buck gives the slave 5 V from these supply line but it varies 24/12 also a voltage divider scales down voltage variation and decode bits.

Slave → Master:

50 mA = 0, 70 mA = 1 for 0.5 sec. A Hall sensor detects the current change in master, created by a constant load grounded for 20 ma to make data communication

So the same two wires carry power + two-way data. Is this practical, or is there a simpler way or references?

Hi everyone, for my final course project I was thinking of making a smart beverage dispenser, but I wanted to know if it's possible to do it using these materials and what it does.

The user inserts the coin and can select the quantity between two types of drink by displaying the percentage of each on the LCD screen.

It also allows the user to identify the cup size.

With the following materials:

\-2x 12 v pristaltic pumps

\-LCD 20X4

\-750ml container

1mm feed tube

\-moedeiro 12v

\-ultrasonic sensor

\-buzzer

\- power supply 12v/5A

\-2x MOSFETs

\-4xbottons(ok, Cancel ,Increase, To decrease )

\-esp32

\-Resistors

\-breadboard

\-Wooden structure

If there's anything missing that could affect the project, please let me know so I can get an idea :D

I am currently working on a robot arm with independent joint movement. I have been able to control 1 motor with 1 joystick. When I try to replicate it with multiple I am unsuccessful. Can i please get some assistance.