Communication
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Build an ESP32 GSM Calling Device with Auto Answer Using GeoLinker In this project, we build a complete ESP32 GSM voice calling device using the GeoLinker GL868 board. The main idea of this project is very simple. When we press a push button connected to the ESP32 board, it will automatically call a fixed phone number. Also, if someone calls the SIM card inside the module, the call will be automatically attended, and we can talk… |
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What Happens When You Build a Private Network Just to Track Cows? A development team recently built a custom long-range livestock tracking system designed specifically for farms located in mountainous regions with poor cellular coverage. Instead of relying on standard GPS trackers that require 4G connectivity, the project uses a private LoRa-based communication network to help farmers monitor cattle positions in real time. The complete setup consists of… |
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PİRANA, A Kamikaze Drone Boat Controlled From The Sky Turkey-based defense company Makine ve Kimya Endüstrisi (MKE) introduced a kamikaze unmanned surface vessel (KUSV) called the PİRANA. This crewless drone boat’s designed to attack enemy ships and other coastal targets. It approximately weighs 1,200 kgs and is capable of speeds greater than 50 knots, which is roughly 93 kmph. In June 2025, a key capability was demonstrated:… |
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Reticulum : A Decentralized Networking Stack A recent project showcases Reticulum, a cryptography-based networking stack designed to build a decentralized, infrastructure-independent communication network. Unlike traditional mesh systems that depend on specific radios sharing the same frequency, Reticulum abstracts hardware into interchangeable “interfaces.” Whether the link is LoRa, Wi-Fi, Ethernet, or packet radio, the protocol… |
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Autonomous Chessboard Uses ESP32 and Stockfish for Intelligent Gameplay A creative maker has developed an impressive self-playing chessboard that can automatically move pieces using magnets and detect their positions. The board is equipped with magnetic sensors beneath each square, while each chess piece has a small magnet on its base, allowing the system to precisely track every piece. An ESP32 microcontroller is part of the setup, handling some hardware… |
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Ultra-Low-Power Neuromorphic Chip Enables Always-On Voice Detection A new neuromorphic chip has shown it can perform continuous voice activity detection while using extremely low power, addressing a major challenge in devices that rely on batteries or operate at the edge of a network. The chip identifies human speech with very fast response times by running neural network calculations in the analog domain. This method keeps voice detection running without… |
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Interfacing the A7672S 4G LTE GNSS Module with Arduino The A7672S 4G LTE GNSS module is a powerful cellular communication solution that brings reliable internet connectivity and precise GPS tracking to Arduino projects. In the world of IoT (Internet of Things), the A7672S module provides seamless connectivity between devices when Wi-Fi isn't available or reliable. If your project is stationary, Wi-Fi is usually a great… |
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China’s Microdrone Innovation Brings Stealth at the Smallest Scale China’s National University of Defence Technology (NUDT) created a mosquito-sized drone, roughly 1.3 centimeters long, tailored for stealth tasks like intelligence gathering for the military. The tiny size makes for easy camouflage in any environment, allowing it to remain close to invisible in covert missions. The drone has insect-like wings that flap to mimic natural movement. … |
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Paralyzed Patient Uses Elon Musk’s Neuralink Chip to Play Games Using Thoughts Rob Grenier became paralyzed after a car accident in 2022. He very recently received a Neuralink brain implant in June 2025 and shared this captivating experience on X, calling it “absolutely amazing”. He was able to move a cursor and play video games using only mental commands. The technology fundamentally is a small implantable chip that’s designed to form a direct communication path… |
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BEL and Tata Electronics Sign MoU to Propel India's Indigenous Semiconductor Ecosystem Bharat Electronics Ltd(BEL), a Navratna defense public sector enterprise that deals with cutting-edge electronics systems, and Tata Electronics, a Tata Group greenfield venture, signed a Memorandum of Understanding (MoU) on June 5, 2025, at Bombay House, Mumbai. This formalizes their joint efforts to develop indigenous electronics and semiconductor solutions. The primary aim of the… |
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What is Amplitude Modulation? Complete Guide with Formula, Circuit Diagram & Practical Demo Amplitude modulation (AM) was first introduced to enable long-range wireless audio communication, representing a major advancement over wireless telegraphy using spark-gap transmitters. Understanding what is amplitude modulation and how it works is fundamental for electronics engineering students and professionals working with radio frequency circuits. This… |
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How to Build a Smart Helmet using Arduino? In this project, we’re making an ordinary two-wheeler helmet smart using an RF Transmitter & Receiver. The best part: this Arduino-based smart helmet is simple to build and does not require advanced engineering knowledge or complex components. Smart Helmet using Arduino - Quick OverviewBuild Time: 6-8 hours | Cost: $40-60 | Difficulty:… |
