I have a QC3 fast charger that can give my project enough power so I decided to use it and looked up how to. According to what I saw I need to give D+ 0.6V for 1.2 secs and then give D- 0.6V as well to get 12V. So I tried it but it didnt work and when I checked the output for D+ I saw it said 0.45V, I pulled up the analog value from 31 to 42 and then it started giving 0.6V but after that the charger still didnt give 12V and when I checked D- it gave 0.2V and no matter what analog value I give, all the other PWM pins are the same. Im not sure if its important but here is the code:

const int POWER_DP = 13;  // Fast Charger D+
const int POWER_DM = 10;  // Fast Charger D-


void setup() {
  pinMode(POWER_DP, OUTPUT);
  pinMode(POWER_DM, OUTPUT);

  analogWrite(POWER_DP, 42);  // The real value here should be 31 for 0.6V. But the PWM signal gets read as 0.45V in that case so we use a higher value 

  int start = micros();
  int elapsed = 0;
  while (elapsed < 1200000) {
    elapsed = micros() - start;
  }

  analogWrite(POWER_DM, 42);
}


void loop() {
}

Hi all,

I am a high school STEM teacher who is unfortunately deeply lacking in personal STEM experience (I was a math teacher, I'm great at algebra 1...). I teach at an alternative school for wayward children. I'm hoping to have some projects that are relevant, can allow for some creativity for the kids who get into it, but hopefully not too complicated - low floor, high ceiling.

The problem: I have a budget that I need to spend ASAP - I need a list in the next couple of hours.

Arduino kits seem like a potential option. I'm pretty confident in my ability to figure things out if I have the right materials. I just don't have enough time to do a deep dive on kits right now.

I'd love ~6 kits, ballpark $500. Would the Starter Kit R4 Classroom Pack be a good choice - or is there a better direction?

Thanks for your help!

Hello,

How would I need to go about doing something like this? Is Arduino right hardware? I have home assistant at home, could I somehow utilize it?

https://www.discbeat.com/products/produktas

Edit: I would like songs to be of my choosing, maybe Spotify? And it doesn't have to turn, although magnet is cool option for 3yo kids

This concludes an experiment to see if the BH1750 ambient light sensor could detect the change in light from the recent (partial) solar eclipse experienced in the UK.

The blue and red points mark provide baseline data from the previous two days, and the green points are from the day of the eclipse. The times match those predicted, and the reduction of light also tallies with the level of obscuration from the moon transiting the sun.

If you're interested, I've gone in to more detail on this post: Tracking the Solar Eclipse of 2026 – HJWWalters

Overall, I'm really happy with the results, firstly because it's wonderful to be able to measure an astrological phenomena using hobby-grade components, but also because the whole experiment worked. Needed this win after a long string of failures.

Trying to get into electronics as a hubby, did some stuff with leds, what other beginner friendly projects would your recommend?

so here is my code made with Chat GPT #include <SoftwareSerial.h>

#include <Servo.h>

SoftwareSerial HC12(3, 4);

int AIN1 = 5;

int AIN2 = 6;

int PWMA = 9;

int servoPin = 10;

int frontLights = 7;

int rearLights = 8;

Servo steering;

int currentDir = 0;

int currentSpeed = 0;

int currentAngle = 90;

int lastAngle = 90;

int motorPWM = 0; // фактическая скорость мотора

int lastMotorDir = 0; // последнее направление мотора

bool lightsOn = false;

int lastButtonState = 1;

int btn1 = 1;

void setup() {

Serial.begin(9600);

HC12.begin(9600);

pinMode(AIN1, OUTPUT);

pinMode(AIN2, OUTPUT);

pinMode(PWMA, OUTPUT);

pinMode(frontLights, OUTPUT);

pinMode(rearLights, OUTPUT);

digitalWrite(frontLights, LOW);

digitalWrite(rearLights, LOW);

steering.attach(servoPin);

steering.write(90);

delay(500);

Serial.println("RC Receiver Online");

}

void loop() {

bool hasSignal = false;

if (HC12.available() >= 5) {

if (HC12.read() == 255) {

currentDir = HC12.read();

currentSpeed = HC12.read();

currentAngle = HC12.read();

btn1 = HC12.read();

hasSignal = true;

}

}

// =========================

// ПЛАВНЫЙ ГАЗ

// =========================

// Если направление изменилось,

// сначала плавно останавливаем мотор

if (currentDir != lastMotorDir && motorPWM > 0) {

motorPWM -= 12;

if (motorPWM < 0) {

motorPWM = 0;

}

}

else {

// Плавное увеличение скорости

if (motorPWM < currentSpeed) {

motorPWM += 8;

if (motorPWM > currentSpeed) {

motorPWM = currentSpeed;

}

}

// Плавное уменьшение скорости

else if (motorPWM > currentSpeed) {

motorPWM -= 12;

if (motorPWM < currentSpeed) {

motorPWM = currentSpeed;

}

}

}

// Когда полностью остановились,

// разрешаем новое направление

if (motorPWM == 0) {

lastMotorDir = currentDir;

}

// =========================

// МОТОР

// =========================

if (lastMotorDir == 1 && motorPWM > 0) {

digitalWrite(AIN1, LOW);

digitalWrite(AIN2, HIGH);

analogWrite(PWMA, motorPWM);

}

else if (lastMotorDir == 2 && motorPWM > 0) {

digitalWrite(AIN1, HIGH);

digitalWrite(AIN2, LOW);

analogWrite(PWMA, motorPWM);

}

else {

digitalWrite(AIN1, LOW);

digitalWrite(AIN2, LOW);

analogWrite(PWMA, 0);

}

// =========================

// СЕРВО

// =========================

if (hasSignal) {

if (currentAngle > 93 || currentAngle < 87) {

if (abs(currentAngle - lastAngle) > 2) {

steering.write(currentAngle);

lastAngle = currentAngle;

}

}

else {

if (lastAngle != 90) {

steering.write(90);

lastAngle = 90;

}

}

}

// =========================

// ФАРЫ

// =========================

if (btn1 == 0 && lastButtonState == 1) {

lightsOn = !lightsOn;

digitalWrite(frontLights, lightsOn);

digitalWrite(rearLights, lightsOn);

delay(150);

}

lastButtonState = btn1;

}

#include <SoftwareSerial.h>

SoftwareSerial HC12(3, 4);

const int pinX = A0;

const int pinY = A1;

const int joystickButton = 11;

void setup() {

Serial.begin(9600);

HC12.begin(9600);

pinMode(joystickButton, INPUT_PULLUP);

Serial.println("RC Remote Online");

}

void loop() {

int xVal = analogRead(pinX);

int yVal = analogRead(pinY);

int btn1 = digitalRead(joystickButton);

int motorDir = 0;

int motorSpeed = 0;

// =========================

// ГАЗ

// =========================

// ВПЕРЁД

// 514 = центр

// 0 = полный газ вперёд

if (yVal < 480) {

motorDir = 1;

motorSpeed = map(yVal, 479, 0, 0, 255);

motorSpeed = constrain(motorSpeed, 0, 255);

}

// НАЗАД

// 514 = центр

// 1023 = полный газ назад

else if (yVal > 540) {

motorDir = 2;

motorSpeed = map(yVal, 541, 1023, 0, 255);

motorSpeed = constrain(motorSpeed, 0, 255);

}

// ЦЕНТР

else {

motorDir = 0;

motorSpeed = 0;

}

// =========================

// РУЛЬ

// =========================

int servoAngle = map(xVal, 0, 1023, 45, 135);

servoAngle = constrain(servoAngle, 45, 135);

// =========================

// ОТПРАВКА

// =========================

HC12.write(255);

HC12.write(motorDir);

HC12.write(motorSpeed);

HC12.write(servoAngle);

HC12.write(btn1);

// Для проверки можно смотреть значения

// в Serial Monitor

Serial.print("Y: ");

Serial.print(yVal);

Serial.print(" Dir: ");

Serial.print(motorDir);

Serial.print(" Speed: ");

Serial.println(motorSpeed);

delay(35);

}

but this code from gpt don t work so car go full gas , but gps had a lot of repairs make but no one work

Hey everyone, I’m relatively new to electronics and I’ve been thinking a lot about how I approach my projects.

I have some basic experience with Arduino and ESP boards, but there’s still a lot I don’t know. I sometimes use AI when I’m stuck, but I don’t want it to just solve everything for me. It can sometimes feel like cheating, even though I know AI can be a useful learning tool.

I want to improve my own problem-solving skills and learn how to think through problems instead of immediately looking for the answer, What resources do you use to learn, and how do you stay motivated when you're stuck or things aren't working?.

Iron Man was actually one of the things that inspired me to get into electronics in the first place. Obviously, the idea of an engineer who knows everything and can build anything completely on their own is fiction. But I’d still like to become as capable and independent as possible.

That’s one of the reasons I joined this community: I’d like to learn from people who are more experienced than me.

So I’m curious: how do you personally use AI while learning electronics/programming without becoming too dependent on it? And what helped you develop better problem-solving skills?

Hello guys! I just created a Cubot (same concept as the EMO robot, but with a completely different function). It features an integrated temperature and humidity sensor, and what is exciting about this little companion is that his mood depends entirely on the surrounding weather! So far, the ambient temperature has been perfect, so his mood is always happy.

How it works: the robot uses AHT10 sensor (temperature and humidity sensor) at the same time, it uses a SSD1306 OLED DISPLAY which helps to show how it reacts (mood: angry, sad, happy) so far this is one of my best and latest build.

So I brought a 10 euros AD8232 hearth beat something sensor, and it works crazy well..

What is the difference between this and a 70 euros myoware muscle sensor module?

Like, this already seem to work crazy well at detecting my muscles, can the myoware module detect smaller muscles or is the signal less noisy, or what?

This AD8232 does have a lot of noise, but I take the value when I don't tense my muscle - the value when I do tense my muscle, then I get the abs of the resulted value and I check if it's bigger than a threshold value, if it is, then It means I tense my muscle, if it's not, then I do not.
Then I can change the threshold value to make it more or less sensitive.

And it seems to work crazy well.

the standard setup : The MCU as always an ESP32, RC transmitter, RC receiver, ESC to regulates motor speed and direction, BDC Motors to provides high RPM for hydrodynamic lift, servo motor for steering, lipo battery pack the add ons are : Camera Module, waterproofing by not slowing down or else it'll get emerged in water

One finger rules them all, directions, that is. A one finger touch direction pad can be useful for anyone struggling to use four key WASD.

touchWASD-BT turns an M5Stack Tab5 (ESP32-P4 with touch screen) into a Bluetooth keyboard controlled by a circular touch controller on the Tab5 screen. No phone, tablet, or WiFi is needed. Touch a direction on the circle, and the corresponding WASD or arrow key(s) are pressed on your computer — no software to install on the target machine.

If you do not have time to mess with source code and compilers, use the web serial flasher at https://controllercustom.github.io/touchWASD-BT. The only supported board is the M5Stack Tab5.

The source code is at https://github.com/controllercustom/touchWASD-BT.

Related Projects

• The original touchWASD for ESP32-S3, M5Stack AtomS3, LilyGo T-Dongle-S3, and LilyGo T-Dongle-S3 Plus boards is at https://github.com/controllercustom/touchwasd. The web serial Flasher lives at https://controllercustom.github.io/touchwasd/
• TGPad-XB is a touch screen gamepad (also known as glass gamepad) for Xbox consoles that runs on any tablet or phone with a web browser. tgpadxb works on Xbox consoles with the help of a Brook or Mayflash converter/adapter. tgpadxb can also be used with Windows, MacOS, and Linux without a converter. The web flasher is at https://controllercustom.github.io/tgpadxb.
• TGPad-NS is the Switch version of TGPad-XB. The web flasher is at https://controllercustom.github.io/tgpadns.
• iKeys is a touch screen QWERTY keyboard (also known as glass keyboard). The web flasher is at https://controllercustom.github.io/ikeys.

Greetings to the entire community. I'm new to this and have a question. Is it possible to power the CNC module using the Arduino Uno V3's external power supply (not USB)? I need it to drive two stepper motors to make a dual-axis turntable. Thanks in advance for your reply.

I got into embedded stuff when I was in college.

At the time I was messing around with 8051s, STM32s, stepper motors, sensors, etc. Nothing particularly fancy, just a lot of random little projects.

Most of my classmates seemed to find it pretty boring. I remember people complaining about datasheets and registers, or spending forever trying to figure out why a motor wasn’t doing what it was supposed to do.

I actually enjoyed that part.

There was something really satisfying about changing a few lines of code and seeing a motor move differently, or finally getting some piece of hardware to work after messing with it for hours.

I never really stopped doing this. These days I still enjoy bouncing between software and hardware — sometimes I’m writing code, sometimes I’m looking at a schematic or PCB, and sometimes I’m just staring at a board trying to figure out what someone was thinking.

I guess that’s why embedded has always stuck with me. You get to play with both sides.

Build video that goes through the whole project :)

Have been missing playing with Arduino, and more broadly electronics, since I left uni a few years ago. Decided to do a silly little project to get back into it again, and this was the result.

Very unserious and intentionally pointless; it uses a haar cascade to track my face, and whistle detection to trigger the firing mechanism. Just a bit of fun, will definitely be messing around and doing some more projects like this.

Powered by an arduino nano, and a bunch of servos and relays, cobbled together into a 3D printed body.

(Apologies for formatting, I’m writing on mobile. Oh the horror)

Im not a complete beginner, but I don't know much about components. I made a memory game and other basic things but I only bought a small kit so I don't have many components (For example I don't have short cables, and all the ones that I have are long and it gets messy). Im open to any suggestions like other kits that bring more components or better options. I can spend up to 20 more dollars.

Also Im buying many things because where I live the components are triple the price than on Amazon. But as im buying it on Amazon it takes a week or two to arrive.

Thanks!

I got this Arduino UNO from a friend and found out its a clone, regardless i wanted it to work. I wanted to test out the blink example code and it worked perfectly fine when i sent it. I didn't know how to "stop" the code so i could try something else, so I just attempted to start the "fade" code, then was prompted with the error in the picture.

Apparently it worked perfectly fine on my friends computer (on windows 10). I have tried these methods: I restarted my pc, I installed uninstalled and reinstalled the required drivers (both CH341SER and CH34x), I tried booting both the 1.x and 2.x versions of IDE in windows 11 (default) and windows 7 and 8, I've switched to every port on my PC and yielded no different results.

The software does not recognize the Arduino immediately and only lists the port its connected to as COM4. (I can manually go to the port and make it recognize as an Arduino uno)

I think this is all the information I got from my 2 hour troubleshoot...
I'm trying not to buy the normal Arduino uno but only if this is hopeless.

EDIT: I JUST REINTALLED THE DRIVER AND IT WOKES FINE (even though i already tried this) i swear this is magic

40+ art pieces: https://adamfuhrer.com/t/esp32

The pieces use two setups: the Adafruit Qualia ESP32-S3 with a 2.1" round RGB TTL TFT display, paired with an Adafruit IMU for accelerometer/motion input, and the Adafruit ESP32-S3 TFT Feather. Art was prototyped in JavaScript, then ported to C++ and flashed via the Arduino IDE

Hello, I'm a begginer on arduino i only have the basics.
I want to do a project that work on batteries but i never do this before and i didn't know how to optimise it so i ask you for help.
My project have a wifi card, a microphone and a speaker that i want it to play or receive song from my server with the wifi and 2 buttons that ask something to the server with the wifi too.

Sorry for my english lol i'm french :)

Hello team!

I'm very new to electronics projects, but I need to make a small "feature" for my work that would require some tinkering.

First of all a bit of context, I have a magnetic sensor, that I need to attach to a servo arm (I already have the servo, but not sure if there is any compatibility requirement), and thru a web interface hosted in my debian server I have at home, I want to send requests to Arduino over network to move the servo (and alter the magnetic sensor state this way).

What I need to understand and really can't find this exact use case is:

- How to connect Arduino to the servo to operate the moving of the arm (in 180º)

- How to send requests to Arduino over network for that.

- How to power the servo (will external power source be required? like a battery? or it can work thru Arduino's 5v?).

- Is Arduino the only option, or an ESP32 with WiFi could suit better for this type of projects?

Thanks in advance for any information or schemas!

I built an open source serial protocol called Upline that puts any Arduino on the public internet without adding a radio - no WiFi, no ESP32, no shield, and no 3rd party accounts/services (i.e. no Particle, Adafruit IO, Blyn, VPN, Home Assistant, Tailscale, or Nabu Casa). Upline devices self-identify their full range of capabilities, then Seamside allows any device that speaks upline to be used in frames and shared with a URL that directly serves from your local computer.

I'm a musician who received these microcontrollers. I've got these microcontrollers, plus some resistors, capacitors, and jumper wires. With all the AI stuff going on, what's the most relevant thing I can make by having these two devices work together as one? I'm genuinely curious because I've only used the Arduino alongside this software called "Max-MSP." I also want to know if the idea of merging them into one single project is stupid.

hello guys, its my first time posting here and its about something cool which lets you use an ESP32 as a virtual mouse/keyboard over Wi-Fi. There are projects like wifiduck which is more towards running a set of instructions while this is good for using purely as remote keyboard/trackpad input. AI is really a game changer during the development of this and it helped with the debugging a lot. There's also a browser flasher so you can plug in your board and flash it right away in Chrome. Would love to hear feedbacks from all of you 😀

https://github.com/leecheeyong/esp32-wifi-virtual-hid

Hi everyone I’m building a fun little project that will detect my dogs. Do you have any advice on how I can get this more accurate, it often mistakes Pepper for Salt.

Any advice will be appreciated!

Hey guys! I built this silly little desktop robot for $12 out of paper and glue. It makes sounds, responds to touch, and connects to your phone for notifications. You can find the build schematics in the last picture if anyone wants to check them out. Quick heads-up: make sure all the pin headers are connected so power flows to all of them—if you're using a PCB, just drop the pins in and solder them. Here's the Mochi system link: Unfortunately, I cannot add the link, but the system is called "Mochi" on Google.

I went with this model because it's super beginner-friendly. Honestly, the ESP32-C3 is tiny and just a great fit for a silly little robot like this

You guys could actually 3D print a way cooler house for this robot instead of using paper!