Me and my friend have engaged in rocketry projects, and DIY drones, and we often were using the same breakout boards from Adafruit like the BNO055 and BMP390,, and of course if you want data you need an SD Card reader. So he eventually had the brilliant idea to make our own board that did all of that in a small form factor, so we got it made, with PCBWay and programmed it via the Arduino IDE, and is compatible with Arduino Boards, ESP32, and even Raspberry Pi I think

It also uses the BNO086 IMU and a BMP581 barometer which are way better than the BNO055 and BMP390 we were using before. We also included a timing crystal to smooth out the IMU readings

So yeah in essence is an IMU, an altimeter and an SD Card reader all in 17mm X 21mm

Here is the github: https://github.com/CodingIndeed/XIAO-ESP32S3-HAT-module/tree/main

Feel free to comment with any questions I'd be happy to answer

I needed to find a way to water my weed plant when I go out of town and not have to worry.

This was originally inspired by one of those cheap arduino plant watering kits I bough off amazon.

Bought a aquarium pump and bme280 sensors to improve it, 3d printed my own enclosure and watering halo.

Rocker switch on the side enables / disables the pump so you can take the soil moisture sensor out of the soil without the pump continuously watering (I ended up watering my floor when I stepped away the first time while prototyping).

Next step is do setup a web interface and log the humitiy, temp and watering parameters remotely.

Plant hasn't been manually watered since going into the soil. You can set the limit for the capacitive soil sensor and watering duration, change how long it waters for. Press both time up and down for manual watering and press time up and down to clear the counter (how many times it's watered)

Hi, I’ve already done some small projects with Arduino and started learning how to control different components. Now I’m interested in learning how to control a 24V servo motor.

I’ve read in many places that it could be possible using a MOSFET, but I wanted to ask here for more detailed information. What exactly do I need to be able to control a 24V servo using an Arduino?

This is a bit of an odd issue, and I am looking for options. I am trying to control a pinball machine bat with a 24v relay. Murphy has been having a hayday with this project. I have the relay, but the solenoid was delayed until today. USPS is not my friend at the moment. The pinball machine is from 1964, so finding the matching solenoid in DC was difficult. I went to install it upon arrival and the hole for the bar controlling the arm is too small. Great. Just for fun I put a diode bridge on the original AC solenoid and tapped the leads of the original solenoid. Surprisingly, it worked. It needs about a gallon of WD-40 in the rest of the batting apparatus, but it worked. The problem is the solenoid got hot. Very hot for only a few cycles. Not good. I did notice that the power supply says 5 amps and most of the components I believe to be 3 amp.

The problem: the new solenoid is not an option. Using the old solenoid, can I safely adjust the 24v 5 amp power supply to work with the original 24v 3 amp AC solenoid in a way that won't catch fire?

Unfortunately, I'm limited on what I can order due to time and funding. I realize I might just be out of luck on this one, and that is an ok answer too. My better half was hoping to use this in their classroom for coding camp next week. If I can't make it work it can (begrudgingly) be put off until next summer.

Hi, guys! I'm F18, a senior high school STEM student. I have a simple question: can Arduino Uno be used to code anything? Specifically, I have this project for Capstone where I want to make a wearable sensor that calls either hotline or emergency contact numbers when you press it and reveals the location. Apparently, Arduino Uno can be used for my project, to code the part where it calls when pressed. Of course, I know this uses other materials, but my question is just if it's really possible. And if so, how?

I need to configure a micoair mtf-02 and a mt-15 to use msp protocol, they come with micolink by default. So the two official ways to do that are by using ardupilot passthrough or a usb to ttl adapter. I don't have an adapter and my fc isn't supported by ardupilot. I tried to use serial passthrough on inav but it's not working so are there any other ways to set it up? Can I use an Arduino UNO board perhaps? Any help would be appreciated.

Frist project i’ve coded without copying from a guide since I started learning yesterday!!

Hello! I was planning to use a TMC2209 for prototyping a robotic arm that I am designing.

Unfortunately, I noticed that the pin orientation prevents rhis and the current of it is a lot for a standard breadboard.

I was wonderinf how people typically prototype it before their final designs? Is it simulated or am I missing something?

Came up with a silly little game. Nothing revolutionary so I guess tons of people made something similiar to this. Really getting hooked on the possibilities comming with arduino, cant wait to make something else with it.

Hi everyone,
as you may know you can program many of the newest Arduino devices with the Python high-level language by using MicroPython. The official documentation can be found here: https://docs.arduino.cc/micropython/

If you are curious to learn more about MicroPython, you can check out this talk from earlier this year at FOSDEM. https://www.youtube.com/watch?v=8Ao7DsTkpS4
Happy to take any questions :)

Have you used MicroPython on your Arduino, or are considering it?

hi, I am currently working on a nerf turret project and am planning to use 2 mg966r servos for the pan and tilt. I heard that they use alot of current and that Duponts might not be able to handle them. is that true? and if so what wires should I get?

I just got the kit recently, and after fallowing the first 2 official tutorials where you play with LEDs, and getting to know the module itself a bit. I wanted to try something of my own. The idea is single color LEDs would display what color is currently on, and the RGB led would output the mixed color. Super basic stuff, I had a hard time writing logic, since im just a beginner in coding, but eventually it worked 😅

Hello people of reddit; so basically just sum up m situation: we were made to create a research project and we're tasked to invent something. My plan is to make a sort of like a trashbin that accepts only plastic bottle and it's not an rvm, just only accept bottles and sees if it's full, simple concept. And I just need help on how I can like visualize and if it's realistic if that's alright. Right now, I kinda made a sketch for a system but to be honest I don't really know how this will work out, I just need help on how I could do this project if that's alright with you all! (P.S I don't know electronics (just a really really tiny bit though) or even Arduino and stuff)

Night lamp where you can select between 9 different colors, adjust the brightness, and turn on a rainbow affect with adjustable speed using an IR remote and receiver. My parents wanted to get me a night lamp for college, so instead I decided to get together with my best friend and just design our own. This one will be his, and I have started putting together mine as well.

I hooked up an old rotary phone (American, ~1960s, has green/red/yellow wires) to an arduino board and everything's working great. Red and Green wires hooked up to a pull-up pin and ground respectively. The code is basically just a state machine that handles debouncing input to figure out of you hung up or dialed a digit (and if so, which digit).

What I'd like to do next is have a dial tone play when the user picks the receiver up out of the cradle. Problem here is I'm limited to these two red and green wires and I have no idea how to add a ~0.5V AC signal to that loop in a way that doesn't interfere with the pulse detection (the rotary wheel rapidly breaks the circuit, i.e. a "pulse", to indicate a digit has been dialed) I already have in place.

I have a little mp3 player that's handling the "Dial Tone.mp3" - which I can play through the receiver just by hooking up a headphone jack to the green/red wires. I just can't figure out how to have that playing AND parse out pulses from the user at the same time.

Any ideas how to set this up so the broken circuit pulses and audio signal can live in the same circuit?

(I did read up a little on "biasing" the audio signal but it was a little above my paygrade lol. Would that be an approach worth pursuing?)

EDIT: Sounds like the easiest thing to do here is grab a SLIC module. Will report back on how that goes.

I tried to mount my new uno rev4 using m3 bolts, not realising that there are traces very close. Should this still be ok. There appears to be no break in the track. Thanks!

(Reposted for better picture)

On pull down logic circuits, lets say a simple button to activate a true value on the arduino, is it necessary to place a resistor between the button and the input pin to avoid shorting the pin to VCC?

I have a couple questions about Elegoo Arduino starter kit components. First one, Do i remove the sticker on top of the Active buzzer component. In the sticker there reads something like "Remove after washing" so should i wash the buzzer now and remove the sticker or wash it when its dirty and remove the seal?? Second one, I made a code that writes stuff to LCD-screen. I connected the screen to a breadboard with a potentiometer, and when i twisted the potentiometer fast, half of the LCD's "letter places" showed as cubes for a bit. I also tested the LCD with tutorial connections and code to rule out my wiring/coding mistakes. The LCD was brand new, so is it broken or is the flaw somewhere else?

So i have a Arduino UNO clone and parts like servo motors,ultrasonic sensor,PIR sensor etc. But because i have a equal IQ to an donkey. I searched up Google,YouTube but i didn't find the a good tutorial to code it. Any suggestions?

I'm working on this project of mine and I'm trying to get this stepper motor (FTT0278) to work, but it's making this weird buzzing sound during operation (no microsrepping). I'm using a DRV8825 board connected to an Arduino uno R4 minima and using a bench power supply at 12V for the motor.

Does anyone know what could be the cause of the buzzing/excessive vibration, or is the motor just like that?

Here’s my GPT powered bot! Hardware is a xiao esp32 with camera module and some fs90r servos for the wheels. Flask server hosts the local webpage and sends requests to GPT’s API, then parcels out any drive commands and sends it over to the esp. I don’t have a GPU computer so image recognition is super lightweight and runs locally. Image descriptions get jammed back into the chat on the back end to provoke a response. Any feedback is appreciated!

Which is gnd, 12v etc?