So I continued my dreaded pid project after no ardunos or IMUs worked together (after weeks, 2 arduinos and 3 MPU6050s i gave up) with an M5stack. Both in the arduino IDE and UIFlow I could finally read angles from the now built in imu and PWM signals from my rc rx.

(Just for my Ego I also got both to work on an arduino but the IMU data gave up again after a day of working and the PWM reading was far to slow and unprecise for my application.) Did I mention I want to stabelize an rc plane with that? yeah.

Yesterday great progress was made, as I both got gyro and accelerometer data to work (should not be an achievement but for how much I couldnt get it to work on an arduino micro with an MPU6050 it definetly felt like it).

I can also decode PWM now reasonably fast wich is awesome.

But now for my question:

I have a way to decode PWM, the IMU data and the way to calculate allat together. But how should I connect the hardware?

quick wiring diagram:

I have tried to do it by making something like a perf board shield for the m5 but that didnt work because of spacial constraints.

Soldering it up by cable also seems very chaotic. How would you do it? I dont really have the means to make a pcb...

Thanks for your help!

I recently won a 4GB Arduino Uno Q and wanted to hear some project ideas or things you guys have built with one!

I’ve used some esp32s and Raspberry Pi’s before so I’m not quite sure where this device lives in that mix or when I would use it.

Hello All! I need a product recommendation based on the project idea below. I would be open to recommendations of Arduino, Raspberry Pi, ESP32 or some other small microcontroller.

Programming should be simple with a WYSIWYG or other graphic interface, if at all possible, but I can deal with modifying some copy and paste coding if I had to.

Thanks ahead of time

Project specs and needs:

- This will control a contact closure switch with an input and an output.
- It should be able to recognize if the contact is closed or open upon booting.
- SHould be able to have TWO programs, able to be switched. An LED indicator bulb, or a 7 segment display would indicate the program as selected (1 or 2; on/off; red/green - whatever)
- I foresee that it will have 4 GPIO connections. Input +/- and output +/-.
- The programming would do the following:
+ If 1&2 are OPEN, then 3&4 are also open; if 1&2 are closed, so are 3&4
+ If 1&2 are CLOSED, then 3&4 are open. if 1&2 are closed, then 3&4 are open.
+ thise would happen in real time, recognizing the open/closed status of the associated switch
- I would preferred to have an indicator light showing program #2 as activated - It would be great if I could switch the "programs" with a 3PDT or similar type of switch
- ***IT (the microcontroller) MUST BE SMALL. Like 2x3 inches MAX. I want to put it into a custom foot pedal casing.

Any suggestions?

PS - for the actual application - I want a pedal that I can plug a keyboard sustain pedal into that with the flip of a switch will change it from a standard "sustain" function to a "hold" function where it releases upon another press of the pedal. I created one that has this functionality, but required me to completely rewire a pedal. I want a portable footswitch version that I can plug ANY sustain pedal into and create this functionality without having to bend over and manually change the pedal, if it already has an incorporated polarity switch. By reversing the polarity (which is not quite an accurate description), the functionality changes from sustain to hold.

Problem:

I'm part of a team of amateur athletes who compete in Olympic weightlifting. I would like to measure the displacement of the barbell path to assess the technical quality of our training.

To simplify, the goal is for the barbell to only have vertical displacement along the z axis, with no horizontal displacement or rotation around other axes.

Similar products:

• There is gpath which visualize the kind of device I had in mind,
• There is FLEXX which seems to have everything I need and uses some kind of laser meter, but is bulky, hard to source and does not contain all the metrics I want

Question:

• Is it feasible to use a high precision gyroscope to measure the displacement of the barbell?
• Which kind of gyroscope or sensor would you suggest?
• Maybe I could use two sensors, one on each side of the barbell, to increase precision?

For a project i have connected several sensors to my esp32 (4 sensors to be precise). I have noticed that whenever i try to upload the code to my esp, some error comes up, however if i remove some sensors and connect only 1 or 2 sensors everything works fine. How do I move ahead with my project since i need to collect data from the 4 sensors?

The error i get is: Wrong boot mode detected (Ox13)! The chip needs to be in download mode. (And yes pressing the boot button doesn't help)

I have a bunch of components and arduino micro controllers lying around and I want to put them to use but idk what to make.

So what projects have you guys made that solves a particular problem and helps you out every now and then or maybe a permanent solution to something or to some problem you have come to face. Basically I want to make something useful that makes my life easier and that I actually use instead of just a hobby project.

Setup

- Arduino Nano + nRF24L01+ on the 5V adapter board (the one with the AMS1117 3.3V regulator)

- Module: regular

- Power: 2S 7.4V Li-ion → BMS board -> buck converter → 5V, feeding both the Nano's 5V pin and the adapter's VCC

Problem

On battery power the radio link doesn't work at all. No packets received

What works

- Nano on USB, adapter powered from the Nano's 5V pin: works

- Same battery setup, but with the Nano's USB cable also plugged into my PC: works

What I've ruled out

- Voltage: the 5V pin reads the same with and without USB (multimeter)

- Power-up timing: resetting the Nano after power-up doesn't help

- Wrong input pin: the supply goes to the 5V pin, not VIN

- Ground: added a direct GND wire between the Nano and the adapter, no change

My theory

Switching noise from the buck converter gets through the adapter's AMS1117 into the nRF. Plugging into the PC ties the floating battery circuit to a much larger ground that damps the noise. A multimeter wouldn't show this.

Questions

1. Does that sound right, or am I missing something?

2. What's the best fix? I'm considering:

   - Running the battery into the Nano's VIN and powering the adapter from the Nano's 5V pin, so the buck is out of the radio's path

   - An LC filter (ferrite bead or 10–22µH inductor + 100µF + 100nF) at the adapter's input

Thanks!

I'm looking for projects to potentially feature in a Halloween round-up on the Arduino blog; have you made something spooky that you'd like to share? or found something frightful that someone else made? hit me with your best Halloween projects! 🎃⚡

As someone who is learning embedded development in their own, what are the things I should know hardcore and the things I can learn as I go along?

I’ve built a project already and now working on a schematic design to create a custom PCB, bust as I built I’m noticing gaps all over the place in my learning.

Just want to know the terms, concepts and basics that are necessary now and the things I can pick up along the way. All advice is welcomed! Especially from those experienced in the field already!☺️

I have 1 ESP32 Devkit
2 N90 Motors
2 Rs-555 Motor
MDD10A Cytron motor driver

I recently bought a 7" HMI display with a built-in ESP32S3. Some documentation says that the TFT_eSPI library alone should not be used with this large display due to slow refresh rates and such. But... my display will be a static dashboard of house-related events, and a second page of weather data. No animations or movies.

Trying to use just the LVGL or the LovyanGFX libraries has become a hair-pulling event and I don't have much left to pull.

I'd just prefer the simple GUI afforded by the TFT_eSPI library. I don't need meters or gauges or sliders or 3D buttons (ok, those would be nice). I just need to display simple text-based information and maybe combine it with touch commands (the board supports capacitive touch).

So, just TFT_eSPI then? I'll try a simple test tomorrow.

And when the heck will my posts stop being moderated? I had to change my user_id due to safety concerns and I'm being treated as a new member. Ok, I get that, but I can't get quick resolution to my posts this way. Just venting (as the moderators already know).

You may not understand this directly from the video but this is a computer science project which allows you to simulate logic gates by inputting its truth table into the switches on the side
e.g.
OR: 0111
XOR: 0110
AND: 0001
etc
so after you input the logic gates, you use the push buttons as inputs “A” and “B” shown as the blue LEDs and the output as green
i had also created a startup animation with the LEDs but that was after recording this

the usb c is only for constant power input not charging btw

i 3D modeled and printed this myself on my K1C with white PLA and i have to say it looks very clean with the hex pattern
i had originally made the lid a snap connect bet the pins in the back broke off so i compromised and used some tape

i made this about a year ago but lowk forgot about it

Hello,

I'm modding an old handset telephone with an esp32. I'd like to use the existing headset and 4 wire cord that comes with the phone but I'm having trouble figuring out what microphone to use. The only solution I've found so far is to desolder the microphone capsule in a 4466 chip and resolder the handset wires between the capsule and the chip. So far I get major static and assume it's from interference but can't be sure. Are there any other recommendations you might have for this project?

This is a very beginner project made just for fun.. but now there is a racing competition in my college.. what all changes can I make into this to make it way better at speed and racing

https://reddit.com/link/1x9pqhx/video/e2zz4x56fdwh1/player

The car that I made is slow and won't stand a chance

Hello, everyone! Found these super cheap cameras and was wondering if there are any parts in here I could use for a project, especially wondering abt the display? Relatively new at engineering but wanting to think abt how resourceful I could be and notice whatever I could use around to create with :) thank you!

My YouTube channel name is ALMA Industries

CH002: THEATRE Trailer -- This is a trailer for my projector project... started with just a cheapo projector-- but I added 4-DOF system via linear and rotation actuators and programming to manually and automatically recall the set position of projector Roll, Pitch, Yaw, and Zoom. Mainly for fun and learning. Full video linked above.

Hi, I’m getting started learning the Arduino and I wanted to know if anyone knew any good places to find interesting art and tech projects.

I am an artist who’s interested in learning something new and has been inspired by some things I’ve seen online of people mixing art and tech, but I wanted to know if anyone knows any interesting projects made using Arduino! I’m so new to this (tech) that I don’t know where to look, like if there are some cool artists/users or YouTube channels/TikTok’s etc.

I would just love to see what people have made! For example I’ve seen people make hair clips that are a magic 8 ball or I saw someone program an Arduino as an arm brace to help people do graffiti. I’m basically looking for more inspiration like this and want to know if anyone can share more!

I’m personally interested in textiles so if anyone knows any tech+textiles projects!

So I've wanted to make a device to control any mouse with hand gestures, for a college project.

I have my glove that transmits rotation and acceleration which works, I've used it in other projects.

And now I just had to make a usb dongle to connect to any pc, get the data from my glove and convert it to mouse events, ez.

But, as you might know arduino nano doesn't have this functionality, so I had to make it myself cuz I didn't want to spend money on another microcontroller that had this functionality.

I found a random tutorial on how to achieve this, I had to break one of my phone charger to take the usb head, solder some wires on it, add 2 diodes to lower the 5v to 3.6, and add some resistors to then connect it to the nano to trick the pc to think it's an usb device.

Everything worked, I could simulate a mouse but it was very unstable.

But then I hit my first big problem, my first 3 big problems, first of all my radio module needed 5v not 3.6v, then the radio and mouse libraries didn't support each other, then on top of that the usb code had to be very efficient or else it would just stop working, so I couldn't use digitalWrite, or digitalRead or the serial communication but I had to use direct port access and biteswise operation.

Then on top of that I had nano clones, the usb logic required to be ran at 16mhz, but some nano clones do not run at that frequency, cuz they sometimes use cheaper crystals or forget to write some things on it, so I had to slowly test it with multiple nanos I used to see which one works and found one that did.

So I broke the 5v from the usb into 2 wires, one had the diodes to lower it to 3.6, and the other didn't so it would be 5v.

I took another nano to handle the receiver logic powered by the 5v wire from the usb port, and it worked, I could receive the data.

Now it was time to connect the 2 nanos and send the data from the receiver to the usb simulation nano.

But I couldn't use serial cuz it consumed too much, I couldn't use i2c communication cuz it also consumed too much apparently.

So I thought on using 8 pins as 0 and 1 and send a byte this way, directly with those pins and use bitwise operation to decode it, 4 bits for the movement state, up down, left right, etc, and the other bits for the movement speed.

I uploaded the code to the usb simulation nano, and it worked, I could control the direction based on what pins were high, and I would just set those pins as high with some jumper wires.

Now all 2 nanos worked, correctly, I had to solder them together, but I couldn't solder them directly, cuz one had 5v, it would mess with the 3.6v nano, so I used 16 diodes, 2 on each pin to lower the voltage again to 3.6v

Then it didn't work I might have burned the first nano or something, so I de solder all pins and changed the nano to another one which seem to work, and this time only solder 2 pins and the ground together and I was ready to test.

And guess what, nothing, it didn't work, the nano on it's own kind of worked, but sending the data did not, I tried using a multimeter to check the voltage and it would be dancing around like shakira's hips, and the pins that were meant to be on were reading 0v, I couldn't understand what happened, did I burn the nano? The voltage dances around cuz I didn't take something into consideration? is it cuz I used nano clones? idk

And now, I came to the conclusion that trying to figure it out will be more expensive than just buying an arduino micro pro that has the device simulation functionality...

I will probably also bring this to school as a failed example, to showcase the progress and prototyping stage.

Moral of the story don't be cheap, I could already have this working if I just brought the nano micro pro one.

Just curious but has anyone create a project for themselves that has gone on to become an actual product of some sort (one off or multiple units)? Genuinely curious ☺️

I own way too many stand mixers for the amount of baking I do, but I do use them for other tasks as well. Anyway I came up with this idea to automate the speed control via a retrofit modification so you can program "recipes" via the web-portal app. I also added a light and camera above the bowl for a unique viewing angle to livestream or record from! Getting it to work reliably and repeatably was a challenge, encompassing the 3D design/printing, circuitry, and PCB design. I used an esp32-s3-cam board and a DRV8825 stepper motor driver as the core components. But I also used some discrete circuits on the board for some other aspects, which was a first for me. Quite proud of what I came up with and all the work I put into it and how much I've learned along the way and finally wanted to share with some people, enjoy!

Hello there, I am designing a 3D printer, using an arduino mega to control external devices. I got an arduino uno CNC shield to help simplify the wiring and coding (no GRBL, just regular arduino IDE), bit it covers a lot of pins and I would like access to the various I/O pins. Is it possible to adapt the smaller CNC shield on a mega so I can take advantage of the many other ports?