Hello! I'm new to the forum and I'm looking for some advice. I'm building a detector that measures the water level of a pool. If it goes over a certain limit, it activates a pump to move the water. It's very simple, and I don't think I need to buy a whole new Arduino Uno to make it work. I was wondering if there is an alternative to buying a full microcontroller, maybe something simpler. I've heard about using an ATtiny, but I want to hear opinions from more experienced people.

So hi everyone this is my first time posting on this place.

I don't usually post things 😞.

So I always wonder why I have to buy all these extra sensors and stuff when my phone already has all these sensors.

So I am building an Android based project which can combine both Arduino and Android together. This thing is not present out there till now I am going to make it full customisable and Full programmable.

The two biggest challenges I have already fixed which are

1. Compiling the code directly on Android device

2. The usb serial communication.

So I will build this application I wanted some feedback on this.

In the below project I have shown the motor rotation + led blink.

Hello! I'm new to the forum and I'm looking for some advice. I'm building a detector that measures the water level of a pool. If it goes over a certain limit, it activates a pump to move the water. It's very simple, and I don't think I need to buy a whole new Arduino Uno to make it work. I was wondering if there is an alternative to buying a full microcontroller, maybe something simpler. I've heard about using an ATtiny, but I want to hear opinions from more experienced people.

So my teacher told us to make an IoT-based project and honestly I'm kinda stuck.

I've been looking around and most of the IoT projects I find are the usual stuff — smart dustbin, smart home, plant monitoring, RFID door lock, temperature monitoring, etc.

I'm fine with taking an existing idea and improving it or making it more advanced. I just want something that's actually challenging and has some proper electronics/embedded/IoT work involved.

I'd also like to 3D print the body/mechanical parts myself, so something where the physical design is also part of the project would be really cool.

I'm not looking for something that's never been done before. I just want something where, after building it, I can look at it and feel like we actually made something substantial.

If you've made or seen any interesting IoT projects that are genuinely challenging, I'd love to hear your ideas.

I’ve been working on a miniature concert stage for my desk that displays the album art and song info for whatever I’m listening to.
Still a prototype, but it’s starting to come together and I’m pretty happy with how it’s turning out.
What would you add or change?

I am working on a omori tamagotchi. It has minigames like a wak a sprout mole and fishing, in the shop Basil is shop owner and sells items from the game and when you fall asleep you move between the faraway town and white space (and the music changes when you move betweenthem).i have the software made but I will probably have to make a pcb but I have no experience in it. If I cant make one I will sowder everything on a bord. If any of you know how to make pcb's I'd love to use some help. If any of you have any idea what more to add I would love to hear it and if you guys want an update I will make one

Good evening! Before I reinvent the wheel, I figured I would ask if anyone has done this before. I have a neighbor who has 2 Great Danes. They will let them out for hours and the dogs will just bark for hours. They will bark at pretty much everything they see and hear. I purchased an ultrasonic bark deterrent from Amazon, and it helped reduce the barking by like 90%, until it broke after a month.

I am looking to create something that does something similar; listen for barking and emit ultrasonic frequency for a couple seconds. While it does that, I want it to timestamp the barking. It will be outside, so I need a weatherproof enclosure.

Has anyone done a project like this? I'd love to see it or hear how you would tackle it!

PS, I know it is easy to say "just go talk to them", but these are people that just don't care that their dogs are going nuts out in the yard at 11pm on a Tuesday. My fear is that if I do approach them about it, and it gets to the point where I file a noise complaint, they will be able to pinpoint the complaint to me and make the relationship hostile. By timestamping the events, I am gathering the information needed for filing the noise complaint, if the project doesn't work.

So I did this basic arduino nano project:
Press fingers -> arduino -> nrf 24 transmitter -> nrf24 receiver -> serial communication -> python
I did this with idea in mind to control PC remotely and it is works as good as can rn, but I’d like to hear ur thoughts and suggestions.
Thank you

I've done updated tests of Ventuno Q vs Raspberry Pi and Ling 3.0 tiny is leading with 201.8 tps prefill / 21.5 tps decode on the Ventuno. That is more than 4x and more than 2x Pi speed.

Gemma 4 E2B gets 693 / 21.9 but I think it's a weaker model. Anyway here you have stats if you want to run a local LLM on Ventuno Q - LMK if you find other models to add to this.

Getting the experience of the use of sensors that come with some beginners kits like the 74hc595, RGB and two color RGB, Tracking, Avoid and a button for RGB.

I am writing the code for an ATTiny85 and SHT41 humidity sensor based exhaust fan controller. Does anyone have recommendations for what humidity level I should use to turn the fan on and off?

Maybe something like turn on at 70% and turn off once the humidity level is has been below 65% for 5 minutes?

Of course I could experiment but I would like to see what others have settled on for similar projects. Or, is this something that is specific to my bathroom and the best way would be to experiment?

So this week im gonna make a DIY version of ortomi robot making same animations and all. Hope you guys like it and as soon as this project is completely done I will leak the code in github so that other creators can make ortomi clones too!

I’m looking for a radar sensor for a DIY project on my own property. I need actual target position data — ideally angle + distance / X-Y coordinates — not just a presence or motion output.

My target is roughly 10 m through a wall, not 10 m free-space line of sight. I know this depends heavily on the wall material, thickness, moisture, reinforcement, etc., so I’m not expecting guaranteed performance through concrete. But I would like something meaningfully better than the common cheap 24 GHz presence modules.

I have already looked at the HLK-LD2450 and HLK-LD2461. They are interesting because of the basic multi-target coordinate output, but in my environment I am only seeing around 4 m through-wall performance.

Requirements:

2D tracking: angle + range / X-Y coordinates

Preferably 6–24 GHz, but I am open to lower frequencies if that is more realistic for wall penetration

Around 10 m through-wall goal

DIY-friendly hardware or at least a development/evaluation board

Accessible raw or processed data via UART/USB/Ethernet/SPI/etc.

Fine with doing custom integration and some signal processing

Are there any FMCW/MIMO radar dev kits, industrial sensors, or other modules that you would recommend? Real-world experience with through-wall use would be especially helpful

Board level project as many sensors that will fit on two Arduino ,one Esp32 ,one OLED sixteen led connected to hc74595 serial to parallel, hum,Temp, analog Temp,RGB with two light RGB, plus a Avoid in with digital multimeter I have enough for one more connect to Uno Esp32 RXTX.

Hi everyone, for my final course project I was thinking of making a smart beverage dispenser, but I wanted to know if it's possible to do it using these materials and what it does.

The user inserts the coin and can select the quantity between two types of drink by displaying the percentage of each on the LCD screen.

It also allows the user to identify the cup size.

With the following materials:

\-2x 12 v pristaltic pumps

\-LCD 20X4

\-750ml container

1mm feed tube

\-moedeiro 12v

\-ultrasonic sensor

\-buzzer

\- power supply 12v/5A

\-2x MOSFETs

\-4xbottons(ok, Cancel ,Increase, To decrease )

\-esp32

\-Resistors

\-breadboard

\-Wooden structure

If there's anything missing that could affect the project, please let me know so I can get an idea :D

Color by color I connected my old VGA monitor up to the computer then sight see monitor then sight see RGB with red green small RGB two color push button in middle for mode select.

Hi everyone!
I'm a 3rd-year Mechatronics Engineering student, and i'm looking for ideas for my Sensors project, which is worth 30% of my final grade.

The project must:
Use an **Arduino** for data acquisition.
Use **MATLAB** or **LabVIEW** for real-time visualization.
Include a sensor (or multiple sensors), calibration/ signal processing (filtering, conversion, etc.), and performance evaluation.

My professor suggested topics like optical/IR sensing, Hall-effect sensors, proximity sensing, liquid level/flow measurement, gas/air quality monitoring, biomedical sensing, acoustic sensing, power monitoring, and multi-sensor fusion, but we're free to come up with our own idea too.

I'm looking for a project that's appropriate for a 3rd-year mechatronics course, isn't too basic, and would make for a strong university project. If you've done something similar or have any ideas, I'd really appreciate your suggestions and if anyone has links to a project that I could benefit from please share it with me!

Thanks!

Took over how the picture tube was for replacement some monitors with cable then match the frame from the television to the frame on the RGB and two color Red and Green, mode select you can see what color or tube to replace.

Hi everyone!

I am working on a privacy-first home safety system that tracks human movement without using any cameras, smartwatches, or wearable sensors.

The Idea:

We use Wi-Fi signals as a room radar! When a person moves, sleeps, or falls, their body distorts the Wi-Fi signals (Channel State Information - CSI) bouncing around the room.

What the system aims to do:

Elderly Care: Detect sudden falls (like a grandfather slipping) and send immediate SMS/Telegram alerts.

Child Monitoring: Detect subtle chest movements to track breathing/restlessness while sleeping.

Privacy-First: Zero cameras or microphones used—completely non-intrusive.

Tech Stack:

Hardware: 2x ESP32-S3 boards (capturing CSI signal data).

Data Processing: Python (NumPy, SciPy) for noise filtering.

Machine Learning: Scikit-learn (Random Forest / SVM) to classify activities.

Alert System: Python backend with Telegram Bot / Twilio API for emergency alerts.

I am currently building the Python signal processing and ML model pipeline while waiting for hardware setup.

Has anyone here worked with Wi-Fi CSI extraction on ESP32? I would love any advice or feedback on handling background environmental noise

Hi everyone, does anyone have any recommendations for Arduino projects that connect well with maths? I’m looking for something practical but with a clear mathematical purpose. Thanks.

I want to make an indicator that tells me what state a wall switch is in. This wall switch controls a bathroom exhaust fan and it’s hard to know when the fan is ON or in it’s timer setting.

This fan has two modes:

• continuously on

• on for 20 minutes then off

I will 3d print an enclosure that is coupled to the wall switch and gets pressed when you press the wall switch. I want to the attiny to turn an LED on when the fan is in the ON state and then blink the LED when the fan is in the timer state.

Can a CR2032 battery do this or will I be changing batteries like every month? Are there better battery options to use for this?

I could try to utilize the SLEEP function in the attiny for when the fan isn’t in use. The LED doesn’t have to be bright, just enough to see it at a glance.

Any thoughts would be appreciated!

Smart helmet ai based for alcohol detection , sleep avoiding and drowsiness reduction.Do have anything to discuss for me ,I am making for a college junior level project