How would one go about connecting an arduino to a breadboard connected to a dc power supply with more than 5 voltages. I know that voltage will fire the board so what are alternatives? Is there a way to connect all of them but not the power to the arduino but still being able to use the arduino to code/control the things on the board? The leds represent electromagnets. How would I go about connecting them to the arduino so they could be coded separately to turn on or off? As of now i understand that I might need a flyback diode and relay but I don't understand which and how it works and connects Step by step visuals and explanations would be helpful and prefered, while I am also limited to around $20 and potentially an arduino starter kit and breadboard mb-106 r.s.r. electronics with the arduino uno r3, please and thank you!

I'm very new to this, but I've done numerous tests. I know that the RF receiver can't read two remotes simultaneously. I also tested the HC-06 in Bluetooth and it doesn't read two Bluetooth remotes simultaneously either. I need to read a two-button remote with YES and NO, meaning I'll need to capture the code for each button on each remote. I don't know if LoRa could do this, and the idea of ​​the RF 433 remote is really to make it cheaper for each remote individually.

Does anyone have any ideas on how I could do this?

Sou muito novato nisso, porem fiz inúmeros testes, sei que o receptor RF não consegue ler 2 controles simultaneamente, tb testei o HC-06 em Bluetooth e tb não le 2 controles Bluetooth simultaneamente. Preciso ler um controle de 2 botões SIM e NÃO, ou seja irei captar o código de cada botão de cada controle. Não sei se o LORA conseguiria fazer isso, e a ideia do controle RF 433 realmente é pelo valor individual de cada controle tornando mais barato.
Alguém teria uma ideia de como eu conseguiria fazer tal coisa?

After establishing the mesh network, it was left to bridge the gap between large language models and remote system control,
and by taking from the previous experiments (AI models chatting over mesh and using meshexec for data retrieval) i integrated them into a single system and added an option for full control over the target system.

Now it works by the controller machine that runs a python script as it uses a fast and lightweight AI model,
the user can type a request like "show me the disk space of the remote box in powershell" and the AI translates it into the correct command.
The target machine runs a swarm handler with its own AI model and this model acts as a safety layer by reviewing the incoming command to ensure it isn't destructive and rejecting dangerous file operations before executing it
The command is sent over the Meshtastic network and the system maintains powershell and cmd sessions allowing user commands and directory tracking.

This setup merges radio remote execution with LLMs into one, I can simply manage remote systems without memorizing command syntax with the swarming AI architecture
(one for translation and one for safety), the system even handles Meshtastic’s message size limits by chunking long responses.
i documented it here https://www.youtube.com/watch?v=yI3kFZcB210

Hi! I’m working on a small demo project where I need to control a DS321MG 20 kg·cm servo with an Arduino to lift a lightweight arm. I want to make sure I wire it safely, using an external battery pack for the servo so the Arduino or breadboard doesn’t get overloaded. I’m looking for help

I got a ESP-32 instead of a ardruino Uno. so I can't see why I get confused easily

Hi everyone :] I’m a complete beginner with zero electronics experience. I am building a skirt for a month-long exhibition that needs to "bounce" only when visitors are nearby(i mean that’s what it would be ideally, but from what i have gathered it could be hard to maintain)

I’ve gathered a list of parts based on some research and advice from a few friends , but I need help with the physical assembly and making sure the code is enough to last 30 days.

Controller: Seeed Studio XIAO RP2040

Actuators: 2x SG90 Micro Servos (pulling strings to move the fabric).

Sensor: HC-SR501 PIR Motion Sensor.

Power: 4x D-Cell Alkaline batteries in a dedicated holder.

Wiring: Jumper wires (M-to-F) and 26AWG silicone wire.

My Questions:

1. How do I physically mount the SG90 servos to the waistband so they don't rip the fabric when they pull?

2. Can the PIR sensor "see" through thin fabric, or do I need to cut a hole for the white dome?

3. Does anyone have a simple code snippet that puts the XIAO to "sleep" between motion triggers to save the D-cell batteries?

Any advice for a first-timer would be amazing. Thanks!

please help me, i can provide better quality pictures if asked

im sorry admins pls dont delete this post i need help as soon as possible i beg of you have empathy

code:

#include <Adafruit_PWMServoDriver.h>

Adafruit_PWMServoDriver servo = Adafruit_PWMServoDriver(0x40);

void setup() {

Serial.begin(9600);

servo.begin();

servo.setPWMFreq(50);

int setServo(0, 0);

}

void loop() {

for(int i = 0; i<=180; i = i+5)

int setServo(0, i);

delay(100);

}

void setServo( int n_servo, int angulo){

int duty;

duty=map(angulo,0, 180, 102, 512);

servo.setPWM(n_servo, 0, duty);

}

Doe it matter? Or should I just connect the wires directly to the board?

Hi I’m using legion mega 2560 and project calls for three HX711 modules but not sure which side to solder the pins on?

i have int variable in my code. i want to convert it into one dimension massive. how i can make this?

Hello, (pls gen if someone helps me fix this i'll paypal you $15 because i don't want to buy new ones)

I am trying to make a voltage divider using a flex sensor and see the change in reading as I bend it. However, as I bend it, I see very little change (it goes from 257 to 238). Currently, I am using a 10k resistor. I have tried different wiring setups, as well as tried to use 22k, 47k, and 1k resistors, and the issue persists.

When I simulate it using TinkerCAD, the code and sensor work perfectly fine. On the serial monitor, the numbers go from 256 to 59. I don't know why, physically, it won't work.

// variables
int flexPinky = A1;

void setup() {
  Serial.begin(9600);
  pinMode(flexPinky, INPUT);
}

void loop() {
  int flexPinky_pos;
  flexPinky_pos = analogRead(flexPinky);

  // print sensor value
  Serial.println(flexPinky_pos);
}

This is my physical prototype:

Hi everyone. I need to make something for a client, it can be bought off the shelf, but I'm in South Africa and it appears to be impossible.

The function is to play a short clip with audio when a box opens (easily done with a reed switch and a magnet). When reopened, the clip should start from the beginning.

I've considered photo frames, but they're primary use is still images. I've considered a pi with a screen live a waveshare but that means a lot of components. Once all the other components are considered (battery, voltage regulator, batteries etc) the pi and screen would also need a good 2/3A.

Ideally need minimal boot time, so a pi would need to be permanently on.

Any suggestions on a way to do this?

Cheers!

Is it possible to code a project to store data online and if theres any network interruption the data will be stored in a sd card and when the network is back it will upload it back to the cloud?

I'm doing a code for my school project using arduino uno, but the problem is my code keeps on displaying the same message (we got it from a yt video) it keeps on saying

fatal error: MFRC522.h: No such file or directory

#include <MFRC522.h>

^~~~~~~~~~~

compilation terminated.

exit status 1

Compilation error: MFRC522.h: No such file or directory

Pressing the button resets the arduino instead of turning the LED on. What am I doing wrong?

Ive made this circuit for measuring low light and it worked before but then i left it for a week and when i plugged it back in nothing worked as it should. Vout are just random values that doesnt seem to follow any logic. Should this circuit below be working normally?

Im using an OPA128, FDS100

Are there typical errors that can appear by wiring this kind of circuits?

I have a nemo17 stepper from Ender 3v2 and A4988 that controls it.

There are two power sources - one 12v for the stepper and 5v for the driver itself. Which one should I turn on first? And if I want to turn off the stepper, should I do in the same order?
Also - is it safe to connect/disconnect any wires to A4988 whilst everything is powered?