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hardware-help

coding-help

official-product-help

project-showcase

general-help

pcb-help

adafruit-help

official-product-help

robotics-help

sensors-help

coding-help

hardware-help

esp-help

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i2c-serial-help

Kyle

10/23/2025

PSA Arduino Q USB connection

I received my UNO Q today, installed App Lab, and proceeded to try and figure out why I couldn't connect the device to my Lenovo laptop with a known good USB C cable. Long story short, use A to C.

Guin

10/23/2025

Confusion about COM port terminology

Hey guys, I recently got an ESP32-S3 to mess around with and I'm a little overwhelmed with all the new terminology. I was under the impression that a COM port was a software layer that mimicked a physical USB-to-Serial wire. However, my board has a port labelled COM, and online research says that its labelled that because it has a physical UART implemented for that USB port. Does this mean COM just refers to a some section where we translate USB data to serial data? ...

HOSEN

10/22/2025

Need help with Firefighting robot(The pictures are the wiring connection)

I have to submit this project on Saturday I only have 40 hours left or so. Here's the component list.
| # | Component | Quantity | | -- | ------------------------------------------------------- | -------- | | 1 | Arduino UNO R3 | 1 ...

Boomarang79

10/22/2025

Wiring an Arduino nano to a RS232-C connector for serial communication

I am trying to wire an Arduino nano to a RS232-C connector so I can send and receive files from a TRS80 Model 100 computer. I am unsure how to wire the connector properly however. I know that the Arduino nano a RX and TX pin but I don't know if that will work with the other device listing RXR and TXR on the pinout. I also don't know what pins to wire the connector up to. Can someone help me draw up a wiring diagram for this?

i’m_struggling🥲

10/22/2025

Hardware Advice for project using motorized wheels with a quadrature encoder for beginner

hello all, I am very new to Arduino programming and hope to get some advice specifically for a power source requirement. this is a long one so sorry in advanced: the goal of this project is to move a 50kg stander that has wheels by using a motorized wheel kit from parallax (https://www.parallax.com/product/motor-mount-wheel-kit-aluminum/) that has a quadrature encoder. each wheel has 12 VDC, 96 W, and requires 2.5 – 8.0+ amps depending on terrain and load. we also want to implement 2 line sensors that the 50kg stander will follow, speakers that will play music, and incorporate a way to plug in an existing head-switch (https://enablingdevices.com/product/head-switch/?srsltid=AfmBOorFtaefJwLmKLel3S1I1kEQgzGLLbicd9KswG2DDRLfWUzKB5-W) that will allow controlled movement of the client on stander. ...

Callsign_Vulture

10/19/2025

Ran out of analog pins

hi guys so i am making a project that requires 7 force sensors, but arduino uno only has 6 analog pins. is there any way for me to get more analog pins (without upgrading arduino)?

godieon

10/19/2025

Nano 33 Rev 2 Broke

I only got this yesterday but its not working anymore. When i plug in the power the led will sometimes turn on and sometimes work, if i squeeze the board together it will stay on a little more. It also wont connect to the ide anymore. It also gets pretty hot when i plug it in.

Markei

10/17/2025

EBYTE E01-2G4M27SX Module help

Hi guys, Ive got a quick question. The module has a IPEX Connector - unfortunately I cant find any information about which connector it uses and how I can find a similar connector on LCSC https://www.lcsc.com/datasheet/C2971733.pdf...

Scooby-Doo

10/17/2025

Raspi 4 to Esp32 connection via hotspot

hello, I'm new to this. So me and my friends are planning to purchase two esp32 for a project. Our plan to connect the two esp32 to the hotspot of our Raspberry Pi 4 for the Pi to control the esps and to pass data around. Is our plan possible? We are on a strict budget so we want to make sure that our plan is possible before purchasing.

Ashuremu

10/16/2025

Em5820 not receiving commands

My thermal printer cant seem to receive commands Here is the code #include <SoftwareSerial.h> SoftwareSerial Printer(5, 6); // RX, TX...

Azmaine

10/14/2025

Arduino nano burned

So this is my setup i am powering the arduino nano from my pc usb it is must for me cuz it takes data from my input and the expansion board is taking 12v 5a and 2 mg996r servo is connected to the expansion board so whats wrong here why my nano got burned

Rixx

10/14/2025

Guys can i program NRF52840 with esp32 c3 over swd with the esp32 being the debugger?

Title says it all pls help me 🙂

DavidSim

10/13/2025

4 motors 4 dof arduino

So my problem is that I have a diagram on 3 motors and I would like to put on 4 motors but how to do it thank you

alexsbmagalhaes

10/13/2025

Help with fixing CPAP

Hi guys I know its not arduino related. But I really like help with this since its health related. All I know so far is that it started losing turbine power. Tonight it stopped once, then I simply restarted it believing I was dreaming or something. Then it stopped a few hours later. I could not restart it. It started beeping and now shows this message. That's all I know so far.

Rixx

10/12/2025

Need 15mah curved lipo

Im making a smart ring from esp32 c3 SoC and need a curved lipo battery give recommendations thx 🙂

Charlie

10/11/2025

Need connections help for the electronics

I was doing a project at where the Nema17 stepper motor should uplift the weight of 300gms. Got the leadscrew,nema17-4kg.cm torque. driver- DRV8825. Arduino-UNO R3. Adapter-12V,5A (input220v AC.output12V DC). Screw terminal bar....

𝖪𝗋𝗒𝗓ę𝗇.

10/10/2025

Rfid and photoresistor controlled lamp.

I've bought all the modules and items I think I need, and I'm a complete begineer, can someone help me to understand a few things?

What Happens

10/9/2025

Super Capacitor Accumulator for Racing Gocart

I am on an engineering team working on an electric go-cart for the E-Velocity competition. We are trying to figure out how it would be possible to build a super capacitor accumulator to give us an advantage. The theory is that because the competition is limited to 2kw of battery draw that when we are not using the throttle (eg cornering/breaking) we would be able to store the energy in a super capacitor in order to use it later as a 'boost'. Any help is appreciated as this is a problem of implementation....

Shux

10/8/2025

HELP THIS ERROR IS HAVING ME GO CRAZY

I have tried a different cabel, computer, and board and it still gives me this Sketch uses 1930 bytes (5%) of program storage space. Maximum is 32256 bytes. Global variables use 50 bytes (2%) of dynamic memory, leaving 1998 bytes for local variables. Maximum is 2048 bytes. avrdude: stk500_recv(): programmer is not responding...

vqoz

10/8/2025

Glorious Model O V2 Mouse Not Working with Arduino Leonardo

Hi everyone, I’m trying to get my Glorious Model O V2 mouse to work with an Arduino Leonardo using a USB Host Shield. I’ve tested the shield and my setup with an older, basic mouse, and it works fine the Arduino detects it and responds as expected. However, when I plug in the Model O V2, nothing happens. No connection sound, no response in the Arduino sketch, nothing. I’ve tried using the HIDUniversal and HIDMouseReportParser libraries, but the mouse still isn’t detected. Has anyone successfully connected a Model O V2 (or other high-end gaming mice) to an Arduino Leonardo? Are there any known compatibility issues or workarounds?...

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Official Arduino Discord - Discuss all things Arduino!

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