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hardware-help

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the other guy

9/25/2025

Rechargeable Battery Pack

I'm having trouble finding a 6V, rechargeable power bank with a male barrel jack output. Preferably, it would have 10k+ mAh. Any help would be greatly appreciated.

Padogee

9/25/2025

NEMA 17 stepper motor help

Hello, 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. here is the code: const int dirPin = 2; // direction pin const int stepPin = 3; // step pin ...

1st

9/24/2025

Battery

just trying to copy this post but as you see comment says that the battery not gonna survive long so is there any recommendation for the battery i should use?

. . . AARAV . . .

9/24/2025

BB940 IR sensor help

I uploaded an code to my sensor (that I fried and cooked earlier) I'm just trying to see if it works. I uploaded an test script

Ocean

9/21/2025

Buying USB C parts to use with Arduino Nano Clone

Hey all! I am purchasing components to use with a Nano clone I buy frequently (LGT8F328P), as it only has a built in micro USB. I am looking to add USB C power and data communication. The cable should be able to plug in either way. From where my research lead me, I should use a 16 pin female USB C connector with 5.1K resistors and wire that in to the Nano to do this. To my understanding these connectors are usually 12v, so I would need a 12v -> 5v buck converter in the mix to get the proper voltage for the Nano (I think?)....

Mercury

9/21/2025

cant get the A motors to work

so im trying to test the tb6612fng module following this guide but for some reason no motor conencted to A works, tried both the modules and different motors that does work but it only A motor that doesnt work https://www.instructables.com/Driving-Small-Motors-With-the-TB6612FNG/

wfwh

9/21/2025

How to Set Up my Smart Helmet system

I'm building a smart helmet with an eye aspect ratio (EAR) detection system, but my plan is still messy. Right now, I’m thinking of using an ESP32-CAM to stream a video of the user’s face. That video would then be transmitted to another device that runs Mediapipe for EAR detection. I need advice on how to set this up properly.

xxJANOxx

9/21/2025

Need help about assembling a arduino based ink plotter.

All the parts are prepared just need help about general stuff and other things along the way

Arie

9/21/2025

What do Portenta Mid Carrier include?

Can I get photos of all what's its box including, please?

חווה יתמין

9/18/2025

LNA help

Hi I know almost nothing about communication and RF. I want to strengthen my antenna signal. My antenna is TX only. I saw this thing (see picture) and I'm not sure it's the right thing I need to use to strengthen my antenna signal. What component should I use?...

wassermelone

9/18/2025

GPS Neo8M Help

I'm trying to use an ESP32 (NodeMCU-32S) to connect to a GPS (Neo8M) to be able to read location data. The issue I have at the moment is I believe it isn't transmitting any data or even connecting. I may have messed up the wiring somehow, an issue with power or the Neo8M. I have the Neo8M connected to the esp32 at RX2 and TX2, connected properly to ground and the siderail of the breadboard to 3v3 power. It isn't showing anything or locking on to a satellite at all really. Any help?

Susour

9/16/2025

Creating a Smart Dustbin but stuck in detecting a mix of wet and dry waste?

A sensor or camera detects when a user approaches to dispose of an item. The system performs an initial visual scan to analyze the waste. If it detects a mixture of both wet and dry waste, even if it is inside a plastic bag, the lid will not open. For acceptable waste (either entirely wet or entirely dry), the main lid unlocks, granting access to the next stage. After the first lid opens, the user places the waste onto a secondary internal platform. An array of moisture sensors on this platform then determines if the item is wet or dry. Based on the data from the moisture sensors, a servo motor is activated. The servo motor rotates the platform or a flap, directing the waste into its designated internal compartment for either wet or dry collection....

vLyrinx

9/16/2025

Flightsim A320 Radio panel (complete newb)

Hello all, I wanted to get my hands on a A320 Radio panel and decided on the route of 3d printing one from online which had a parts like and things. Only problem is Im a complete newb ordered all the parts and I have No idea how anything goes together. i do have experience soldering and actually doing it. But have no clue how to actually wire everything up correctly for the arduino and the switches etc... Here is the link for what i'm making: https://www.printables.com/model/1126963-airbus-a320-radio-panel-rmp#hardware...

. . . AARAV . . .

9/16/2025

Fixing PC

Fixing starc pc

nekko

9/15/2025

LED only turns off when both buttons pressed

I’m testing out the logic behind MOSFET BS170 gates on my arduino but I think I’m confused.. I’m trying to get the LED to turn off when both buttons are pressed not just one but so far I’ve only been able to get it to where pressing one of the two buttons turns off the LED. I tried making an NAND gate and a standard AND gate but it won’t work.. Looking for some tips/guidance on the topic. Below is my test circuits that didn’t work.

Franscis123$#

9/12/2025

DFROBOT SER0019 Servo doesn't works

I'm trying to use the DFROBOT SER0019 Servo but it doesn't works, it just has a lightly vibration, sounds very low. You should ear it at max volume and close to the speaker at least. I made the image like that because my phone hasn't a good camera resolution, a photo directly to the Arduino doesn't looks clearly. The code related to servo:...

Maddie

9/12/2025

Relay not working with pumps

im using a 12v battery power supply (those for drills) for testing. Heres my wiring setup: Arduino VCC-> 12v relay VCC arduino gnd -> relay gnd ...

. . . AARAV . . .

9/12/2025

Continuation of lcd display error

This is an continuation of @Graphite s problem

VectorVoyager

9/11/2025

RP2350 based PCB review

I would be glad if you can review my RP2350 based PCB: https://github.com/semitov/rp2350-gpio-card

confidential_

9/10/2025

Dedicated CC/CV modules for charging 18650 batteries?

I am not very familiar dealing with 18650 batteries. Its a very simple 3 cell 18650 in series managed by a HX-3S-01 BMS. I am planning to add USB C PD charging functionality along with smart battery charging features like constant current and constant voltage switching because thats how li ion batteries are supposed to be charged. There are readymade solutions like this https://www.amazon.in/Step-Up-Overvoltage-Protection-Charging-Applications/dp/B0FDRCMWT8 but they simply take in 5v3a usb input and boost it to 12v along with the cc/cv switching functionality to charge it which is not usb PD. I also found the XL4015 module that chatgpt sent me but isint that just a buck converter? so I have to manually change the settings instead of it automatically switching between CC and CV? or am i wrong?...

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Official Arduino Discord - Discuss all things Arduino!

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Official Arduino Discord - Discuss all things Arduino!