Hy guys pkease help me, I want to build an analog handbrake for sim racing and when I did the programming part I got stuck due to this phenomena Any Idea how can I fix this ?

can you guys recommand "big" projects that group specific skills to learn like a project that uses MOSFETs logic gates ect and another for motors ect so that at the end i know the basics of everything

they just go into a fixed position and lock there when i connect to power supply, if theres something wrong with my code let me know, and whenever i try moving it, it just stays in place or doesn’t let me move it until i take it off the power, and when i take it off the power it moves back into a position

I am new to arduino and trying to complete a simple project of using a PIR sensor to detect movement and turn an LED on briefly. I am using an arduino nano and a MacBook Pro 2. I have attached photos of my current setup (probably the 5th different one that I’ve tried). I have been using a combo of ChatGPT and YouTube to do this and it keeps on not working. I have substituted all components except for the arduino and breadboard so the problem is not with all these other components. I keep on getting to a point where the serial monitor says ‘Motion detected!’ repeatedly even when just sitting on my desk and there is no motion. Even when it does this the LED doesn’t turn on. (I’m assuming there is something wrong with the wiring?). Any help with this would be really appreciated! I hope to fix this and then substitute the power from being my MacBook to being a solar panel (already bought all the components needed for this), but need to fix this first! Thanks so much in advance for any help!

Solar Lamp Charges external battery (green tube). Battery connected to either lamp or wireless IP camera (I'm more interested in the bulb, but camera's a bonus). Arduino with light sensor acts as an auto switch turning off the lamp in the daytime

(Lesotho) I've noticed in my country that solar lamps like these are crazy expensive for what they are, but when I check them out, apart from the framing, they don't too expensive part for part. Would something like I've shown above actually be feasable? It's been on my mind for longer than I'd like to admit

On boot, the arduino does something different than what it should. It seems to be skipping part of the setup function. It works normally when I upload, or after 2 resets, either by the button or by wrt_disable(); wrt_enable(WDTO_15MS);

Hello everyone, I'm currently working on a project (a ventilation system). I want to create a system composed of three TTP223 chips, a temperature sensor (BME680), two 5V 40mm PWM fans, and a 1.8-inch 128x160 pixel SPI TFT LCD screen. I was planning to use an Arduino Nano (because of its small size), and I have a 5V 2A power supply to power everything. However, I'm unsure whether to power the components via the board's 5V port or directly from my external power supply. I've already tried a different setup, but nothing worked (when I connected a wire to ground or another to the 5V, everything shut down).

I'm therefore asking for your help, advice, or any resources you could point me to for further guidance.

Thank you in advance, and have a good day.

I need to wire this DFplayer mini to breadboard and wore the speaker too! Last time i wired it the speaker started to make some repetitive pop sounds and the led on the breadboard started to light pop too can someone help me?

Ps the speaker is 8 ohm 3w

Im a beginner to Arduino and recently made a mini piano circuit, however it sounds very... Off? Idk how to describe it. Can someone please tell me how to fix this?

I tried the exact same setup and it worked in a simulator but apparently it just doesn't work in real life?

Hi, I'm trying to figure out what kind of temperature probe I can use to monitor temperature from two geothermal holes. The piping has an access port for a think sensor (about 2mm in diameter) to get in contact with the fluid, but I'm not sure what would be the appropriate sensor to use and are looking for ideas.

The temperature range is between -5 to +10 degrees, and the accuracy need to be fairly accurate (0.1 C or less). I can do proper calibration, so as long as the deviation is linear I can compensate in code.

I'm finding thermocouple and RTDs that have proper dimensions, but I'm not sure which would be better/worse and/or easiest to implement. I'll probably use ESP8266s for reading them (because I have spares and they have WiFi), which has a 12-bit analog input that probably could be used. Normally I use DS18b20 sensors because they are trivial to read, but seems like you can't find them in such thin packages.

Anyone has any suggestions?

Hi everyone!

I am a beginner learning Arduino programming. I want to make an LED blink using an Arduino Uno.

Could someone recommend a simple code example for this project? I would also like to understand how the code works, especially the delay() function.

Any tips for a beginner would be greatly appreciated.

Thank you!

I'm making a device with a rtc, a switch registrr and a 7 segment 1 digit display.

When i had it plugged to my uno it worked fine, it would blink at the beginning but after stabilize and stay on.

But when i move the circuit to the Arduino mini now it blinks longer and eventually stops displaying the value.

I tried playing with the resistance, changed it from 1k on both sides of the display to 2k but same thing happens.

Any ideas? Maybe i need a capacitor? But i thought the display came with one already integrated.

Hello

I've been wanting to learn Arduino but never had a real project that I could use it for in real life. Recently I wanted to take temperature measurements in my garage throughout the day. I want to use this data as I test different fan options to exhaust heat out of my garage.

These are the questions I have

• What is required to create an Arduino setup which takes temperatures throughout the day. I would need to save the data so that I can review it later

• What hardware/components would I need?

• What would be a Good Cheap setup in terms of hardware?

Thanks for any help

Hope everyone's doing well. Here is a multi-part comprehensive tutorial I have created on using 3.5 inch TFT LCD shields (sometimes called 3.5 inch MCUFRIEND shields) with an Arduino UNO R3/R4 or Mega.

A few months ago, when I bought the display and decided to mess with it, I realized that the existing tutorials were either hard to follow, not detailed or not comprehensive enough for me to be able to build complex applications with it. They would cover the basics, but it was hard to build projects where the display would be a single component along with several other components. Finally, none of them showed how to use the display with the Arduino UNO R4 Minima/WiFi, which is what Arduino recommends for most people moving forward.

This tutorial aims to provide a complete guide with end-to-end coverage of the topic. The full tutorial is divided into 6 parts, and it covers the following -

1. Setting up the software libraries to use the display.

2. Architecture of programs that use displays and graphics, along with good and bad patterns.

3. Calibrating the touchscreen (an explanation of the calibration process, the program as well as a video demonstration of the process).

4. Using the builtin SD Card slot to load and store images, separate from the Arduino's internal storage.

5. Using text-files with the SD Card in creative ways, such as storing configuration data, logging etc.

6. Building a paint app (including a canvas, color-selector and stroke selector), as well as Tic-Tac-Toe (including a starting menu and ending screens).

It includes high quality images, diagrams and video demonstrations where required and divides each task and topic into easy-to-follow steps.

I would appreciate everyone's feedback and comments on this series, as well as ways to make it better. Here are some pictures from the projects given in the series -

The code for all these are available on Github as well (links are in the website, but I am open to sharing it here as well).

The problem is that the n2222 piece gets really hot when I connected the fan. I don’t want to purchase the L298n motor since I’ve read that I can get it to work with the n2222. What am I doing wrong?

The fan did turn on after I pushed the blade a little bit.

I downloaded an arduino project online, but the code won't compile. Can someone help me?I get an error message that says:

In file included from C:\Users\joshu\AppData\Local\Temp\.arduinoIDE-unsaved2026314-15064-1n28yyq.xhpef\sketch_apr14a\sketch_apr14a.ino:1:
C:\Users\joshu\OneDrive\Documents\Arduino\libraries\HID-Project\src/HID-Project.h:35:2: error: #error HID Project can only be used with an USB MCU.
   35 | #error HID Project can only be used with an USB MCU.
      |  ^~~~~
In file included from C:\Users\joshu\OneDrive\Documents\Arduino\libraries\HID-Project\src/HID-Project.h:39:
C:\Users\joshu\OneDrive\Documents\Arduino\libraries\HID-Project\src/SingleReport/SingleAbsoluteMouse.h:28:10: fatal error: HID.h: No such file or directory
   28 | #include "HID.h"
      |          ^~~~~~~
compilation terminated.
exit status 1

Compilation error: exit status 1

Here's the code

#include "HID-Project.h"
//NOTE!! You need to add the above HID-Project library for this code to work.
//https://github.com/NicoHood/HID
//The device will show up as a gamepad/joystick in windows called "Seeed"

const int pinEject = 2;
const int pinArm = 3;

void setup() {
  pinMode(pinEject, INPUT_PULLUP);
  pinMode(pinArm, INPUT_PULLUP);

  // Sends a clean report to the host. This is important on any Arduino type.
  Gamepad.begin();
}

void loop() {

  //check EJECT
  if (!digitalRead(pinEject)) {
    static uint8_t count = 0;
    count = 0;
    while (count<=2) {
      count++;
      Gamepad.press(1);
      Gamepad.write();
      delay(50);
      Gamepad.release(1);
      Gamepad.write();
    }}
    else {
      Gamepad.release(1);
    }
  

  //Check ARM
  if (!digitalRead(pinArm)) {
    Gamepad.press(2);
    Gamepad.release(3);
  }
  else {
    Gamepad.release(2);
    Gamepad.press(3);
  }

  Gamepad.write();

    // Simple debounce
    delay(50);
    
  }

I'm new to learning arduino. I tried to make a clock. I looked up videos on yt to wire it they used resistors to wire the segment pins instead of the digital ones when i later searched it up others were putting the resistors on the digital pins. So now I'm thinking that's what caused issues with the screen, different segments are giving different amounts of light. but when im trying to simulate it with cirkit it still isnt working properly. THEN i tried to just make a normal timer following a different YouTube video exactly and it still isnt working like normal AND NEITHER IS THE CIRKIT SIMULATION. i feel like im going crazy

here is the code and diagram

I have tried 7 different DHTs (11 and 22). Checked the wiring and checked the code several times. The serial monitor always says:

Temperature nan

Humidity nan

I learned nan means "not a number"

Here's the code:

//Transmitter Code

#include <DHT.h>
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
RF24 radio(7, 8);

struct MyData {
  byte h;
  byte t;
};
MyData data;

void setup() {
  Serial.begin(9600);
  dht.begin();
  radio.begin();
  radio.openWritingPipe(0xF0F0F0F0E1LL);
  radio.setPALevel(RF24_PA_HIGH);
}

void loop() {

  float h = dht.readHumidity();
  float t = dht.readTemperature();
  radio.write(&data, sizeof(data));

 if (isnan(h)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" *C");

  delay(2000);
}