Cell Phone Detector Circuit for Cell detection in Restricted Area
Cell Phone Detector is a circuit that can sense the presence of any activated cell-phone nearby and gives an indication of activated cell-phone near around of it. Basically Cell-phone detector is a Frequency Detector or a Current to Voltage Converter Circuit which catches frequencies about 0.8 - 3.0GHz (Mobile band frequencies). RL tuned circuit (Resistor–Inductor circuit) is not suitable for detecting the RF signals in GigaHertz range.
If you wanna build it, you can check out the complete tutorial here: https://circuitdigest.com/electronic-circuits/cell-phone-detector-circuit
For the most part all my courses have finally reached a close leaving only the capstone class remaining. There is a fair amount left to tackle, so I foresee some long days ahead. Honestly, I am looking forward to the semester ending and graduating just so I can take a month or two off from everything. I didn’t realize until Friday how much I just need a break.
Since coming to university, I’ve either been a full time student struggling to balance self-care and classes. Or if I was not in classes then I was working for engineering companies to get experience. It takes a long time to break down a person with just a boat load of work but I am finally at that point.
The end is in sight.
2 days remaining.
(23/08/2020)
Spy ROBOT WITH FALAME AND GAS SENSOR Follow @easytronic3795 for more related project AND ANY HELP U CAN DM ME U can subscribe my youtube channel for explained vedio ( EASYTRONICS ) https://m.youtube.com/watch?v=W7l80lYLcAY&t=135 #electrical #electricalengineering #electricalengineer #arduino #electrician #electric #electrohouse #electricity #electronica #electrico #electronics #electr#engineer #mechanicalengineering #mechanical #project #projects #innovation #circuit #adafruit #raspberrypi #technologies #technology #techno #arduinouno #pcb #arduinoproject #robot #robots #circuits (at Busan, South Korea) https://www.instagram.com/p/BvoSKRKn_5e/?utm_source=ig_tumblr_share&igshid=qry51zkusedw
;; boyfriend!yamaguchi means late-night study sessions in your shared apartment where the only light comes from his dual monitors and the soft glow of his keyboard. as a college senior finishing up his degree, he’s perpetually surrounded by circuit boards and half-finished coding projects, but he always makes sure there’s a spot on his desk cleared just for your coffee mug.
;; boyfriend!yamaguchi is the type to get incredibly focused—brows furrowed, glasses sliding down his nose—only to completely melt the second you touch the back of his neck. he’s all professional and composed when he’s talking about his upcoming job at the electronics company, using big technical terms that make him look so grown-up, but the moment the door shuts and it’s just you two, he’s tucking his face into the crook of your neck and letting out a shaky sigh of relief.
;; boyfriend!yamaguchi has this specific habit of letting you test things. he’ll bring home small gadgets or prototypes he’s working on and insist he needs your input, but really he just wants an excuse to sit behind you, his chest pressed to your back, as his long, steady fingers guide yours over the buttons. he’s so patient and gentle until you turn around to praise him, and then you see that familiar, pretty flush creeping up from his collar.
;; boyfriend!yamaguchi is surprisingly bold in public—holding your hand firmly, pulling you closer by the waist to avoid a puddle—but the power dynamic pulls a complete u-turn the second you get him behind closed doors. he loves it when you take the lead. he’ll sink into the pillows, looking up at you with those wide, adoring eyes, his breath hitching every time your hands wander somewhere a little more daring. he’s a stuttering, beautiful mess under your touch, constantly whispering how much he belongs to you.
;; boyfriend!yamaguchi definitely keeps a folder on his laptop labeled ‘boring schematics’ that is actually just hundreds of candid photos he’s taken of you while you’re not looking. he’s a bit of a nerd about capturing the ‘perfect lighting,’ which usually just means whenever the sun hits your face while you’re reading. if you ever catch him looking, he’ll try to play it cool, but his ears turn bright red, giving him away every single time.
;; boyfriend!yamaguchi has already started looking at ‘employee plus one’ benefits for his new job next year. he won’t say it out loud yet because he doesn’t want to spook you, but he’s already mentally moved you into the ‘forever’ category. he shows his devotion in the way he kneels between your legs to massage your feet after a long day, or the way he lets out a needy, soft whine when you stop running your fingers through his hair.
;; boyfriend!yamaguchi loves giving you ‘just because’ gifts. because he’s going into electronics, he’s always fixing your broken chargers or building you custom, aesthetic lamps for your bedside table. but his favorite thing to ‘fix’ is your mood; if you’re stressed, he’s immediately on the floor at your feet, resting his head on your lap and looking up at you like you’re the only person in the world who matters. he’s so soft, so eager to please, and so hopelessly yours.
;; boyfriend!yamaguchi is the type to get all flustered and formal when he’s explaining his senior thesis, but the second you slide your hand up the inner thigh of his slacks under the dinner table, his voice cracks so hard he has to excuse himself. he’s all tall and lean now, looking every bit the professional electronics engineer in his button-downs, but he’s still the same boy who loses his breath when you take control.
;; boyfriend!yamaguchi loves it when you use his desk chair for things other than studying. he’ll be sitting there, trying to focus on a circuit diagram, when you decide to crawl into his lap—not to cuddle, but to straddle him. he immediately goes weak, his hands hovering over your hips, terrified to touch but desperate for you to press closer. he likes the friction, the way you feel so heavy and right against him, and the way he has to tilt his head back and expose his throat to you just to keep breathing.
;; boyfriend!yamaguchi is a “please” and “thank you” kind of guy, especially when he’s under you. he’s surprisingly vocal when you have him pinned to the mattress, his back arching off the sheets as he begs for you to keep going. he loves the feeling of your weight on top of him—it grounds him. he’ll grip the headboard until his knuckles are white, his eyes blown wide and glassy, completely undone by the way you look down at him with that specific, hungry expression.
;; boyfriend!yamaguchi has a thing for your hands. maybe it’s because he works with his own so much, but seeing your fingers curled around him or pressed against his lips makes his brain short-circuit. he’s so submissive in the bedroom, folding himself however you want him, his long limbs tangling in the blankets as he lets out these soft, high-pitched sounds that he’d be mortified for anyone else to hear. he’s your personal project, and he loves it when you get touchy.
;; boyfriend!yamaguchi is definitely prone to overstimulation, especially when you use that tone of voice that lets him know exactly who’s in charge. he’ll hide his face in the crook of his arm, his skin flushed a deep, feverish red from his chest up to his ears, trembling under your touch. he likes it when you’re a little demanding, when you tell him exactly what to do for you; the realization that he can make you feel good just by being your plaything is enough to make him lose his mind.
;; boyfriend!yamaguchi has a habit of leaving his webcam covered because he’s paranoid, but he has no problem letting you see every messy, unraveled inch of him in the dark. he’s the type to get teary-eyed when it’s too much, his eyelashes wet and clumping together as he whispers your name like a prayer. he’s so sensitive, so responsive to every flick of your tongue or scratch of your nails, and he’ll spend the rest of the night curled into your side, shaking and spent, thanking you for taking such good care of him.
Tabletop 3D printer cuts semiconductor 3D patterning from days to minutes
Faculty in the Cockrell School of Engineering have developed a rare printer as part of a larger project to speed up production and lower costs of manufacturing semiconductors critical to modern electronics.
Currently, manufacturing semiconductors has such a high entry cost that only a few companies in the world can do it at a commercial scale. Extreme Ultraviolet (EUV) lithography uses machines to "print" circuits onto a silicon substrate using a complex series of mirrors, tin, and a mask that then becomes the computer chips in phones, laptops, and other devices.
EUV lithography printers will usually run the average buyer more than $200 million and take up an entire room. Texas Engineers and their partners have created a tabletop EUV lithography device by stripping the traditional printer down to just basic components. This system is more versatile for researchers, more modular, and less expensive.
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.
I finally finished my engineering project yesterday!!! nerdy rambling below the cut
We had to build a fire-fighting robot (yes, this is an actual thing that exists), with variable speed track technology and a warning system. It also had to have a tilt and rotate feature. I decided to just make a vaguely tank-looking thing.
Making the body of it wasn't too difficult. It's made of aluminium. The top part (the turret) is made of acrylic . Though it's a much more complex shape, I just designed it in CAD and laser cut it. I then bent it into place using a strip heater (which was quite easy since they're all 90° bends).
Here's the inside of the turret. It's on a hinge and is able to be opened, as one of the requirements of the project was that all electrical components have to be visible without dismantling. The motor there powers the 'tilt' and there's also a buzzer that serves as the 'warning system'. Getting all of the holes to line up with the components was a bitchhhhhh.
On the underside of the vehicle, there's a motor that powers the 'rotate'. It allows for 360° degrees of rotation. I also have a motor each for the wheels. Initially, I was going to have each wheel controlled by their own DPDT switch. This would have allowed for the vehicle to turn left and right, and move backwards. In the end, I decided against it as it felt unnecessary - and I was right. The tracks barely function and tend to slip off. Creating the ability to change direction of the wheels rotation would have just caused more problems.
I made a controller that houses all of the switches. Electronics took me about four or five hours to do yesterday. Braiding the cable itself took about three hours - but I'm happy that I decided to do it, because it makes the wiring look pretty clean. I was so so worried that the electronics wouldn't work. I had individually tested all components beforehand, so I knew that they all worked. However, I started wiring the electronics by attaching all of the switches to the controller, and then braiding the wires. I had to hope and pray that once the wires were braided, they would correctly correspond to each of the components. I am so unbelievably bad at understanding how electrical circuits work, that it's genuinely a miracle that it managed to work out.
The project isn't exactly what I had envisioned. A lot of things changed from my initial design. Honestly, I'm just happy that it's finished. Many people in my class weren't able to say the same. I managed to finish about two hours before the project was due. When I left school, there were still a few people working.
I was in the engineering room from 9am to 9:30 pm yesterday. I didn't even take a break unless it was to go to the bathroom. It was the biggest lock in of my life. Being on only one hour of sleep didn't really help, I felt so out of it towards the end. My eyes and back hurt so fucking much. I'm just happy that it's over.
I wish I could say that I can now take a break, but that's not even true. I still have to write up my report for the project, and make CAD drawings for some of the parts, as well as write a report for my computer science project. It's one thing checked off of the list, so I'm happy about that.
What about Prompt 9 with Donnie and the brother of your choice? He definitely strikes me as the type to be self-conscious/worry about stuff like that.
Thank you for the prompt, and sorry for the wait.
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It wasn’t often that they got to hang out, just the two of them. But Mikey was laid up in bed with a twisted ankle – a new skateboarding trick gone awry – and Raph was out with Casey tonight. With a marathon of Master Splinter’s soaps on TV, April off staying with her sister for a few days, and Leatherhead busy fixing up his new home, there really wasn’t anyone else to ask.
Don had tried to insist he didn’t need the help. It was just a junkyard run. Just a trip for a few components that he couldn’t order online, or their human friends couldn’t easily pick up for them. He wasn’t even after anything bulky or heavy, this time. He could manage on his own.
But Leo wasn’t having any of it. Perhaps it was because they’d grown up having to hide their very existence in order to remain safe. Or maybe it was a combination of all the crazy high jinks they seemed to effortlessly get themselves into, paired with that phenomenon that Raph liked to call ‘Turtle Luck’.
Of course, it didn’t help either that Don had recently been taken captive by the Triceratons when they invaded the planet. To be fair, a lot had happened in those few short days – aliens attacking the Earth, Don getting captured, Bishop strapping them to dissecting tables, Leatherhead’s torture, the Professor’s sacrifice…
So, maybe Don could understand his brother’s anxiety about letting him leave the lair alone. If he was honest with himself, Donnie wasn’t entirely sure he wanted to go out on his own right now, either.
But Leo? It was so rarely just the two of them. Not that Don didn’t enjoy his stalwart brother’s company; of course he did! They were alike in many ways. Both very studious. Both prone to quiet introspection. Both used to picking up after the others when Mikey got one of his harebrained ideas or Raph let the ‘hit first, ask questions later’ impulses win.
But outside of missions, or whole family activities, Leo and Don didn’t really spend that much time together. Leo’s hobbies tended to be rather isolative – reading and meditating and perfecting his katas. And Donnie always had his beak in some gadget or project. There just… wasn’t a lot of overlap.
Besides ninjutsu, and being brothers, what did they really have in common? Don could always talk vehicles with Raph, and Mikey was almost as excited for the latest tech as their resident engineer was. But what did he share with Leo, other than being the quiet ones?
“Talk to me, bud.”
Don jumped as he found his brother at his side. Sure, they were ninjas. But Leo took the whole ‘silent as a shadow’ thing to a whole other level. Donnie wasn’t normally this oblivious to his surroundings, though. Maybe it was a good thing he wasn’t alone, after all…
“Is it your head?” Leo tried again, glancing worriedly at his brother’s temples, “Do you need another dose of painkillers?”
Of course, Leo made sure to bring some meds when they went out. Always thinking three steps ahead, that turtle.
Don’s fingertips ghosted over the points where the Triceraton mind probe had infiltrated his skull. The resulting migraines had eased to moderate headaches by now, and he was hopeful that they’d continue to lessen as time went on. But he couldn’t be sure that he’d ever be completely free of the mind probe’s side effects.
It could have been a lot worse, Don reminded himself, ruefully.
“I’m ok,” he replied, with a gentle shake of his head, “Just… thinking.”
His hands fell back to the circuit boards in his lap. He’d dug them out of a pile of broken electronics at the dump and sat down in a sheltered spot to sort through them. Most of them seemed to just need a simple fix. There was one with a black and white pattern on the other side that seemed nearly new. But his heart wasn’t in it right now.
Leo could tell. “So, what’s up?” he pressed, gently, “I can see something’s bothering you.”
That was another thing about family: you learned to read each other pretty well over the years. Especially when you only had each other for company growing up.
“I…,” Don wasn’t sure how best to express the storm clouds brewing in his heart. But he might not get another opportunity like this. Perhaps it was best just to spit it out? “Leo, would… would we be friends if we weren’t siblings?”
Leonardo made it a point of pride to never get taken by surprise. He trained for hours every day to hone his senses and sharpen his mind, in order to be prepared for any eventuality. Their very lives often depended on it.
But he clearly hadn’t been expecting that.
“Don, I… Where did that come from?”
Donatello couldn’t meet his brother’s eyes. “I know it sounds stupid, but… I just… We rarely hang out, just the two of us.”
“We’re hanging out right now,” Leo pointed out, evenly.
Don shook his head. “Only because it’s not a good idea to go topside alone at the moment. I as good as dragged you away from your book to come babysit me out here.”
Leo’s eyes softened. “Watching out for each other is not the same thing as ‘babysitting’. I like hanging out with you, Don,” he assured his brother, putting a hand on his shoulder, “And I would have put aside whatever I was doing for any one of you.”
“But that’s my point!” Donnie threw his hands in the air, “It’s always me pulling you away from your hobbies to go on a scavenging run. Or you calling me away from the lab to train or go on a mission. We never just do something together because it’s what we both want to do.”
Leo opened his mouth to protest further. But he must have seen something in Don’s expression, because his jaws shut again without a word. His eyes scanned carefully over his brother’s face, taking in every minute detail. A little part of Donnie’s mind couldn’t help wondering if this was what his gadgets felt like when he studied them…
“This really bothers you,” Leo said, at last. It was a statement, not a question, but it wasn’t unkind. “Don, of course we’d be friends. Even the best of buds don’t spend every moment of every day together. There are other ways to be friends than sharing the same hobbies and interests. We don’t have to be around each other all the time to enjoy each other’s company. And just because we don’t like the same things all the time, that doesn’t mean we don’t have any common ground.”
A comforting smile lifted the corners of Leo’s beak. “But maybe we should hang out more, just the two of us. I’m sure we can find things we’re both interested in.”
A little of the worry and doubt churning in Donatello’s gut lifted. It made him feel better to hear that Leonardo wanted to be his friend, as well as his brother.
“I’d like that.” In fact, the checkerboard pattern on the other side of that circuit board had given Don an idea. “Hey, Leo. Have you ever wanted to learn how to play chess?”
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Bonus shout out out to the fabulous fic Countergambit by lepapillonrose for the idea of Don and Leo playing chess together. Headcanon accepted 110%! :)
