Mar 24
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seen from Mongolia
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seen from Türkiye
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I have once again caused panic in an entire firm( not the one I work for ) :3
Every. Single. Microcontroller. They have ever made have errors in the bootloader. This will cost them a few millions at least.
Which I discovered via the hidden technique of *checks notes* reading the manual...
I will say this always. The tech industry on the whole is incompetent. They follow only the regulations they have to, and there are nearly none for software.
If you can write sentences without undocumented abbreviations and read the manual, you are in the top 20% of software developers.
While I was working I was asked several times if I had used chatGBT to try to solve the problem I was having at that time. And always answered "No. I need garantees that the info is correct".
Like, no. The problems that have come from people not reading the manual and just guessing if things worked will not be improved by asking the propaganda malware machine that spies on me, and studies have found makes you worse at anything you use it for.
10 Arduino Projects Every Electronics Student Should Build
When most people start learning electronics, they focus heavily on theory-Ohm’s law, circuit analysis, microcontrollers, and communication protocols. While these concepts are important, true understanding comes from building real projects.
Arduino has transformed the way students, hobbyists, and engineers learn embedded systems by providing a simple platform for turning ideas into working prototypes. From smart security systems and renewable energy solutions to interactive displays and wireless automation, Arduino projects help bridge the gap between classroom knowledge and practical engineering skills.
Over the past few years, I’ve explored several Arduino-based projects that not only improved my programming skills but also deepened my understanding of sensors, communication protocols, displays, automation, and real-world problem solving. Here are ten projects that can help anyone strengthen their embedded systems knowledge while building something genuinely useful.
1. Touchscreen Tetris Game Using TFT LCD
Learn how to build a touchscreen Tetris game using Arduino Uno and TFT LCD shield with touch controls, score tracking, collision detection,
One of the most exciting ways to learn embedded programming is by creating an interactive game. Building a touchscreen Tetris game with Arduino introduces concepts that go far beyond blinking LEDs and reading sensors.
The project combines a TFT display with touch input to create a fully functional gaming interface. Developing such a system requires handling user interactions, graphical rendering, collision detection, game logic, and memory management — all within the limited resources of a microcontroller.
What makes this project particularly valuable is that it demonstrates how embedded systems can support complex graphical applications. The same principles can later be applied to industrial control panels, touchscreen dashboards, and custom user interfaces.
2. DIY IR Remote Controller
Learn how to build a DIY Arduino IR Remote Controller with NEC protocol decoding, IR transmission, EEPROM storage, and wireless device contr
Infrared communication remains one of the most widely used wireless technologies in consumer electronics. Televisions, air conditioners, projectors, and media systems continue to rely on IR-based control systems.
This project demonstrates how an Arduino can transmit and receive infrared signals, allowing users to create their own programmable remote controller. Along the way, you gain practical experience with signal encoding, decoding, timing analysis, and wireless communication principles.
Understanding IR communication builds a strong foundation for exploring more advanced wireless technologies such as Bluetooth, RF modules, and Wi-Fi-enabled devices.
3. Real-Time Ambient Lighting System
Create your own PC ambient lighting with Arduino Nano! Sync WS2812B LEDs with your screen for a stunning RGB setup-complete guide with code.
Modern gaming setups and entertainment spaces increasingly use ambient lighting to create immersive experiences. This project demonstrates how Arduino can be used to control RGB LEDs dynamically based on environmental conditions or external inputs.
Working on this project introduces concepts such as addressable LED control, serial communication, color processing, and real-time data handling. It also showcases how electronics can enhance user experiences through intelligent automation.
For anyone interested in smart home technology, this project serves as an excellent introduction to responsive lighting systems.
4. Sound Level Detector Using Arduino Nano
Learn how to build a sound level detector using Arduino Nano with circuit diagram, code, and components. Perfect for beginners and DIY elect
Environmental monitoring forms the backbone of countless IoT applications. A sound level detector provides a simple yet effective introduction to sensor-based data acquisition.
Using a microphone sensor and Arduino Nano, this project measures ambient noise levels and converts analog signals into meaningful digital information. It introduces analog-to-digital conversion, signal processing, threshold detection, and sensor calibration.
Despite its simplicity, the project demonstrates how embedded systems can interact with the physical world and transform raw sensor readings into actionable data.
5. Interfacing SHT30 Temperature and Humidity Sensor Module
The SHT30 is a high-precision digital temperature and humidity sensor that communicates via the I2C protocol. It provides accurate environme
Environmental sensing is one of the most common applications of embedded systems and IoT devices. The SHT30 sensor provides accurate temperature and humidity measurements while communicating through the I2C protocol.
This project teaches how digital sensors communicate with microcontrollers and how environmental data can be collected, processed, and displayed in real time.
The knowledge gained from this project can be extended to weather stations, greenhouse automation, industrial monitoring systems, and smart HVAC applications.
6. DIY Laser Tripwire Security System
Build a Laser Tripwire Security System using Arduino, a laser module, a laser receiver sensor, and a buzzer
Security applications are among the most practical uses of embedded electronics. This project uses a laser beam and a light-sensitive receiver to create a simple intrusion detection system.
Whenever the laser beam is interrupted, the Arduino immediately detects the event and activates an alert mechanism. The project introduces optical sensing, event-driven programming, and automated security responses.
Although simple in design, the underlying concepts are similar to those used in professional security and monitoring systems.
7. Dual-Axis Solar Tracking System
How to create a dual-axis sun tracking solar panel project using Arduino, its components, working principles, and more.
Renewable energy technologies are becoming increasingly important, and solar tracking systems play a crucial role in maximizing energy generation.
This project uses multiple light sensors and servo motors to continuously adjust the position of a solar panel so that it remains aligned with the sun throughout the day.
Beyond introducing renewable energy concepts, the project teaches sensor feedback systems, actuator control, mechanical movement, and automated decision-making processes.
For students interested in sustainable engineering, this project offers valuable real-world insights.
Project Link:
8. Smart Motion-Activated Lighting and SMS Alert System
Enhancing security and automation in homes and offices has never been more straightforward with today’s advancements in microcontroller tech
Combining automation with communication capabilities creates powerful smart security solutions. This project uses a PIR motion sensor and GSM module to detect movement and immediately send SMS notifications.
In addition to improving security, the system automatically activates lighting whenever motion is detected, making it suitable for homes, offices, warehouses, and restricted-access areas.
The project introduces motion sensing, cellular communication, remote alerts, and integrated automation systems.
9. Bluetooth-Controlled Servo Motors Using Smartphone
With the increasing demand for remote control systems in various fields such as robotics, automation, and IoT, this project focuses on devel
Wireless control has become a standard feature in modern electronics. This project demonstrates how a smartphone can communicate with an Arduino through a Bluetooth module to control servo motors in real time.
The system provides an excellent introduction to wireless communication, UART protocols, motor control, and user-device interaction.
The same principles can later be applied to robotic arms, automation systems, remote-controlled vehicles, and smart home devices.
10. Arduino-Based Digital Clock Using DS3231 RTC and LCD Display
Accurate timekeeping is crucial in various applications, from simple household clocks to complex time-tracking systems in industries. In thi
A digital clock may appear simple at first glance, but it introduces one of the most important concepts in embedded systems: reliable timekeeping.
This project combines an Arduino Uno, a DS3231 Real-Time Clock module, and a 16x2 LCD display to create a highly accurate digital clock capable of maintaining time even during power interruptions. Unlike software-based timers, the DS3231 includes a battery backup and temperature-compensated oscillator that ensure long-term accuracy.
The project teaches I2C communication, LCD interfacing, real-time data processing, and RTC integration - skills that are widely used in attendance systems, industrial controllers, data loggers, IoT devices, and automation platforms.
For beginners, it provides an excellent introduction to practical embedded system design while delivering a useful everyday application.
Final Thoughts
The journey from beginner to proficient embedded systems developer is built one project at a time. Each project introduces new challenges, whether it’s understanding communication protocols, processing sensor data, controlling actuators, designing user interfaces, or implementing automation logic.
What makes Arduino such a powerful learning platform is its ability to expose users to real engineering concepts without overwhelming complexity. By working through projects involving displays, sensors, wireless communication, security systems, renewable energy, and real-time monitoring, learners gain practical skills that directly translate to professional engineering applications.
If you’re looking to improve your electronics and programming skills, don’t just read about technology - build it. Every successful project teaches lessons that no textbook can fully provide, and every failure becomes an opportunity to learn something new.
The best engineers are not defined by how much theory they know, but by how effectively they can transform ideas into working solutions.
UART, SPI, and I2C Explained for Beginners
If you're learning Embedded Systems, you've likely heard of UART, SPI, and I2C. These are the most commonly used communication protocols that allow microcontrollers to communicate with sensors, displays, memory devices, and other peripherals.
UART
✔ Simple serial communication ✔ Uses TX and RX lines ✔ Commonly used with GPS, Bluetooth, and GSM modules
SPI
✔ High-speed communication ✔ Uses MOSI, MISO, SCLK, and CS lines ✔ Ideal for displays, SD cards, and memory devices
I2C
✔ Requires only two wires (SDA & SCL) ✔ Supports multiple devices on the same bus ✔ Widely used for sensors and RTC modules
Why Should Students Learn These Protocols?
Understanding UART, SPI, and I2C is essential for anyone pursuing a career in Embedded Systems, IoT, Robotics, or Automotive Electronics. These protocols are frequently used in real-world projects and are common interview topics for embedded engineering roles.
Master these communication protocols, build hands-on projects, and take a strong step toward becoming a successful Embedded Engineer.
Solenoids go clicky-clacky 🔩🔊🤖
We're testing out an I2C-to-solenoid driver today. It uses an MCP23017 expander. We like this particular chip for this usage because it has push-pull outputs, making it ideal for driving our N-channel FETs and flyback diodes. The A port connects to the 8 drivers, while the B port remains available for other GPIO purposes. For this demo, whenever we 'touch' a pin on port B to ground, the corresponding solenoid triggers provide an easy way to check speed and power usage.
So today i finally sat down to the SPI modules i bought recently. I was most interested in the SD card slot, because i think having removable flash storage is better than having flash storage soldered on board and on the other hand the LCD screen seemed kinda scary.
I wrote some code, the way i usually like by making references to datasheet chapters etc. Everything was going well but the card did not work. I knew it was ok since it worked when plugged to my PC, but it was not responding to my init commands over SPI.
I googled and googled but nothing seemed to work. I tried my no-name logic analyzer but for some reason linux didnt recognise it - it used to work a few years ago but no more i guess.
Eventually i decided to check all the data that is being transmitted to the STM32 chip by changing all the writes into read/writes. Turns out MISO line was high all the time, non stop. This activated some alarm bell in me since it looked like an electrical error.
Eventually i found some random thread about arduino with what seemed to be a similar problem. What i did not mention is that SD cards work with 3.3v (afaik) which is not a big deal since stm32 also works on 3.3v. Sometimes one might want to plug them into a 5v circuit though and to accommodate that, the board i bought contained a voltage level regulator type of chip forgot the name. Essentially converter between 3.3. and 5v signals.
Apparently, in some cheaper no name modules like mine, this type of chip bugs out and keeps on holding the MISO line high despite the fact that SD card has let it go long time ago. This sounds like exactly what is happening to me.
Solution? Glorious:
Bypass the voltage converter. 3.3v should still be considered high state even by 5v circuits, so it should work.
I appreciate the random person who just bumped into a random thread after 2 years of inactivity and just dropped this knowledge. These folks are the backbone of the internet and im glad to have been in his position once or twice myself.
I myself did not feel like soldering that wire, especially since the pad on the socket is super small and these modules are very cheap. Since STM32 works on 3.3v anyways, and atmegas also have low voltage versions nowadays i decided to just buy another module which has no additional ICs on it - no voltage regulators, converters etc, just plain SD card socket and routed connections, maybe a resistor or two.
Funny thing in the end, but also kind of irritating, since it took me long enough to finally sit down and start tinkering with this stuff. Also it might turn out there's a different problem at play and i just bought some more electrojunk for no reason. But then again, i put some more sensors and SPI fun stuff into the basket when i was orderign the new module, so there's always new stuff to look forward to.
Oh also im using rust for this with rust-embassy, just because stm32 HAL is ugly and i dislike it very much. Rust has been great so far but it's kinda hard to find out how to do stuff outside of examples in their repo.
Hi, I just got into tech (actually 1 year in but I still feel like I don't know anything).
I learnt python, R, SQL, Tableau and concepts in Data Structures, Algorithms.
[Just the Basic level of the listed.]
But I can't write my own programs on python or create anything.
I was hella impressed by your microprocessor project, and when I took up tech (ai and data science) I assumed I would do something like that or at least code.
Now, I am just venting but where do I start, how do I make projects what are some interesting projects, what should I learn? A lot of my seniors tell me to have a wide range of knowledge like focus on one thing by depth but add other things. For example: you can study data analytics in depth but have some knowledge in ethical hacking and web development etc. Like an all rounder.
Wow ok a lot to unpack here, I'll get started
Lots of places recommend that you start with Arduino, as there are a lot of good tutorials out there. I somewhat disagree
I think that raspberry pi is better because it's usually a lot cheaper to buy the stuff you want to play around with
But an even cooler way to do it, go to wokwi.com and start a project on a Raspberry Pi Pico (make sure it's the micropython version) and then you can get started there
Google something like "Blink led with Pi Pico micropython" and there will be a tutorial or two
Then, once you've played around for a while you can buy a Pi Pico for very little money and see your stuff work irl!
If you need any more help or have any questions, feel free to DM me and I'll see what I can do