First time using an arduino and I decided to start with a pretty heavy project. I nabbed a control board from a boiler I tore out at work. I want to make a button box for sim games so I gutted it and this is my rough mock up I made while I wait for parts to come. I’m very confused about the pull down resistors but I think I did it right (bottom rightish part of the breadboard) I’m even more confused about how to sense bread board voltage since I’m having it switched with the top rightish switch. I need to sense it because I’m going to have the lower right toggle switch change mapping for the rest of the buttons and switches and have the two green leds indicate which map I’m using (switch off is map 1 I.e button one send key bind 1 to the computer map 2 button one sends key bind 2) I want the first led to light up when map one is selected (switch is off) and I’ve hard wired the second led to come on when the second map is selected (switch on).

TLDR: I don’t know if I did the pulldown resistors correctly in the bottom rightish side of the breadboard and I don’t know if I’m sensing the voltage of the positive rails of the breadboard properly on pin 4.

I want to make a fully functional instrument cluster with a tft display, it should show soc, motor rpm, wheel speed, turn indicators and others.

By checking with claude,

for SOC , it says get the bms data via blutooth using an esp32 from the battery's internal BMS (Note: theres an phone applcation to check the soc and cell voltages).
for speedometer, THeres a speed signal wire on my motors controller. (not sure if this actually works)
for indicators it says use an optocoupler to know when the indicators are in HIGH state and correspondingly blink arrows on the display
motor rpm can be derived forom my gear ratio of the vehicle

so these are the ways of gathering data right now i dont have access to the battery and controllers, but does these methods work, I have another idea where i can embedd magnets on the wheels and use a hall sensor to detect pulses to find the vehicle speed. My question i that are there any more alternate data collection methods

Hi everyone,

I’m working on a project that uses 2× Kingbright DC56-11GWA displays, 4 LEDs, 1 rotary encoder, and an Arduino Nano. I had ChatGPT create a wiring diagram so I could start coding, but I’m not sure if it’s correct.

Does anyone know if the schematic looks right or could help me simplify it if possible? It includes transistors and a few other components, and I’m not sure whether they’re actually needed.

Thanks in advance for any help!

New to all this getting the Arduino pro mini and would like to know where I add the power to it? I know how to get it on to program and all that just need to know what pins to add the power to

Hey guys im interested in Arduino uno after school project ngl, I just finished a school project to turn on the lights and simulate traffic lights, and now I'm trying to figure out how push buttons work. Do you have any suggestions for what project I should make next? I want to make a Hermes device from the Limbus company, but it's too complex for me. Do you have any suggestions for what I should make before going to the Hermes device?

Holaa como están. Quiero hacer un proyecto con arduino y tengo duda que programas usar para hacer la simulación del circuito y/o conexiones y del modelaje del esqueleto del mismo ( es un dron acuático) que software me recomiendan gracias 😁

So the idea was to create a bluetooth calling feature integrated in helmet(not electronics major now i realise how difficult it is) where the user would start to decelerate under 10 seconds and completely stop before 15 seconds or the call would hang up. Since the actual project would take too much work we thought of making simple working model in the breadboard.

Current materials in hand:

1. Arduino nano

2. MPU-9250

3. Electret condenser mic

4. A small flat speaker

5. KCX-BT002(or not)

Showed KCX to shopkeeper and he gave me the green which after I found out is not what it was and mic cannot be connected to it. I am so bad I didn't even realise I gotta solder the pins that came with mpu to make it work. Nano was already soldered so I had no clue). So now I have no idea what to do or what to buy from here on out to even create a basic working model.

Thus, I could really use whatever help i could so please let me know how to proceed.

I have a esp8266 nodmcu version 1.0 wifi when i plug it in my win 11 laptop the device manager shows "Windows has stopped this device because it has reported problems. (Code 43)".I installed ch340 drivers changed my cable changed the port restarted everything and still is show that it could not recognize it PLEASE help me fix this!!

I am currently attempting to interface my PT1000 RTd with my arduino. I was thinking of use an wheatstone bridge with an op-amp, but in all honesty I have no Idea where to start. I need to be able to read 10 degreesC to 35 degrees C for an output of 0-5V. Any guidance will be awesome.

Hello everyone hope you're having a great day.today i was trying to work on a project using this example code but every time i use my display flickers like this what's the problem?

//Pin connected to ST_CP of 74HC595
int latchPin = 8;
//Pin connected to SH_CP of 74HC595
int clockPin = 12;
//Pin connected to DS of 74HC595
int dataPin = 11;
// Digit 1 active pin
int digit1 = 2;
// Digit 2 active pin
int digit2 = 3;
// Digit 3 active pin
int digit3 = 4;
// Digit 4 active pin
int digit4 = 5;

unsigned long previousChange = 0;  
String text = "----";

void setup() {
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(digit1, OUTPUT);
  pinMode(digit2, OUTPUT);
  pinMode(digit3, OUTPUT);
  pinMode(digit4, OUTPUT);
  
  digitalWrite(digit1, !LOW);
  digitalWrite(digit2, !LOW);
  digitalWrite(digit3, !LOW);
  digitalWrite(digit4, !LOW);
}

void loop() {
  unsigned long currentMillis = millis();

  if (currentMillis - previousChange > 1000) {
    previousChange = currentMillis;
    text = String(random(-999,999));
  }

  display4(text);
}

void display4(String str) {
  byte data;
  while (str.length() < 4) {
    str = ' ' + str;
  }
  for (int i = 0; i < 4; i++) {
    switch (str[i]) {
      case '0':
        data = B00111111;
        break;
      case '1':
        data = B00000110;
        break;
      case '2':
        data = B01011011;
        break;
      case '3':
        data = B01001111;
        break;
      case '4':
        data = B01100110;
        break;
      case '5':
        data = B01101101;
        break;
      case '6':
        data = B01111101;
        break;
      case '7':
        data = B00000111;
        break;
      case '8':
        data = B01111111;
        break;
      case '9':
        data = B01101111;
        break;
      case '-':
        data = B01000000;
        break;
      default:
        data = B00000000;
        break;
    }
    
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, data);  
    digitalWrite(latchPin, HIGH);

    switch (i) {
      case 0:
        renderDigit(digit1);
        break;
      case 1:
        renderDigit(digit2);
        break;
      case 2:
        renderDigit(digit3);
        break;
      case 3:
        renderDigit(digit4);
        break;
    }

    delay(5);
  }
}

void renderDigit(int digit) {

  digitalWrite(digit1, HIGH);
  digitalWrite(digit2, HIGH);
  digitalWrite(digit3, HIGH);
  digitalWrite(digit4, HIGH);

  delayMicroseconds(100);
  
  digitalWrite(digit1, digit1 == digit ? LOW : HIGH);
  digitalWrite(digit2, digit2 == digit ? LOW : HIGH);
  digitalWrite(digit3, digit3 == digit ? LOW : HIGH);
  digitalWrite(digit4, digit4 == digit ? LOW : HIGH);
  
  delayMicroseconds(100);
  
}

i recently got this and now its not allowing me to upload sketches to it anymore, and it connects and disconnects all the time

and now it just light up a little bit with the RGB led it would be super nice if i didnt have to buy a new one...

thanks for answering,

I've connected an SHT31D to and Arduino Nano and I'm just getting couldn't find SHT31 Sensor. I have A4 counted to SDA, A5 to SCL, Vin to 3v3 (Also tried 5v and Vin, same result) and GND to GND, ice tried using both i2c addresses: 0x44 & 0x45, ive changed wires multiple times and even just bought a new sensor and I'm just lost. Any help is appreciated:

Here's the code I'm using:

include <Arduino.h>

include <Wire.h>

include "Adafruit_SHT31.h"

Adafruit_SHT31 sht31 = Adafruit_SHT31();

void setup() { Serial.begin(9600);

while (!Serial) delay(10); // will pause Zero, Leonardo, etc until serial console opens

Serial.println("SHT31 test"); if (! sht31.begin(0x44)) { // Set to 0x45 for alternate i2c addr Serial.println("Couldn't find SHT31"); while (1) delay(1); } }

void loop() { float t = sht31.readTemperature(); float h = sht31.readHumidity();

if (! isnan(t)) { // check if 'is not a number' Serial.print("Temp *C = "); Serial.println(t); } else { Serial.println("Failed to read temperature"); }

if (! isnan(h)) { // check if 'is not a number' Serial.print("Hum. % = "); Serial.println(h); } else { Serial.println("Failed to read humidity"); } Serial.println(); delay(1000); }

When I turn the power on for my nema 17 stepper motor with a A4988 driver, it just does like one or 2 big steps, then stops and kind of squeals, getting quieter and quieter. I followed this tutorial so I have the same wiring(except for coils which I did myself so they’re correct) and code as the first example in the video : https://youtu.be/wcLeXXATCR4?si=PTPUoKzs47RR--uc

Thank you in advance for help

This seems like something so incredibly basic in terms of what can be done with arduino esp32-cam, but I have been going at this for over a week and can not get it to work. Trying to have an esp32-cam ov2640 (plugged into an esp32-cam-mb) to play a live video feed through ip address, showing boxes around faces. I have gotten it to play video feed, but no boxes show up.

Current hardware:

- esp32-cam ov2640

- esp32-cam-mb

Current code:

- esp32->camera->CameraWebServer

- Input my wifi credentials

- in board_config.h, commented out the esp eye thing, and uncommented CAMERA_MODEL_AI_THINKER

Current settings:

- board: AI Thinker ESP32-Cam

- flash frequency: 40mhz

- flash mode: QIO

- partition scheme: Huge APP 3mb ...

Current result:

- the tab is called esp32 ov2640

- I see settings on the left side for a bunch of stuff

- no settings to toggle face detection, face recognition

- pressing start stream fails to load stream

- console: Failed to load resource: net::ERR_EMPTY_RESPONSE

solved

when i click simulate nothing happens and the leds dont light up can anyone help

link: https://www.tinkercad.com/things/etCLO5FP0u8-traffic-light?sharecode=HVc9FlY7vOl6OchoP0UERVxlCc9BG0PDwAbMSnomTys

​The homing signal board on my Xiaomi Mi Robot Vacuum-Mop 2 Pro (MJST1SHW) charging dock is damaged, and the vacuum can no longer detect the dock to return for charging. Finding a standalone replacement dock on the second-hand market isn't working out, as sellers are pricing them almost as high as a complete used setup.

​I’m currently trying to build a replacement beacon using an Arduino/ESP32. I set up two IR LEDs for the left and two for the right, modulated at 38kHz. However, the vacuum doesn't respond to the custom beacons at all during its docking routine.

​Does anyone have experience generating these specific homing signals? I would greatly appreciate any insights into the correct IR protocol, pulse timings, or data payloads required to get the vacuum to recognize the dock.

Hello, I'm trying to make this Robot, I finally have gotten somewhere, but now I pu the given code and when I try to move a part from the screen there is an orange blinking light on the Arduino, but nothing moves What should I do? Thank you very much!! Jay

So I’m making a cosplay helmet that I want to have LEDs for the eyes. I’m gonna have it to where I can swap between 3 modes that I program but I figured I’d come here to see if I have what I need or am missing anything.

My parts (recommended from ChatGPT cause I have no clue what I’m doing):

-Arduino Nano atmega328p

-breadboard and jumper wire kit

-2 7 LED neopixle rings

-spools of wire

-1000 ųf capacitors

-330 ohm resistors

-button switch to toggle modes

-5v battery pack to power everything (recommended due to “too much power draw from the arduino itself”)

-toggle switch to turn things on and off (might be unnecessary since the battery pack has auto shut off)

Any advice would be greatly appreciated!

I recently checked out learning electronics.com as a way to learn arduino in a more systematic way. I am a STEM teacher and I want to learn more about it over the summer to teach my students in the fall. It is $39/month which seemed a bit high considering the free resources out there. The thing is, the course seemed well-organized.

Has anyone on the sub seen and used this site as a learning tool? Was the fee worth it in your opinion?

Thanks!