community news
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Maker Builds an Offline Wikipedia Using an ESP32 Board and Its Built-In microSD Card Slot to Store Data Alun Morris’s Offline-Wikipedia using ESP32 is an open-source project that turns the inexpensive ESP32-2432S028, commonly called the “Cheap Yellow Display” or CYD, into a standalone Wikipedia reader. The hardware combines an ESP32 microcontroller with a 320×240 ILI9341 color display, an XPT2046 touchscreen, and a microSD card interface. Instead of depending on Wi-Fi or cloud services, the… |
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This ESP32-P4 Turns a DJ Controller Into a Laptop-Free DJ System With Two Music Decks and Audio Mixing A maker has built a standalone DJ system using the ESP32-P4, allowing a Pioneer DDJ-FLX4 DJ controller to work without a laptop running DJ software. The open-source Pajoniiir project uses a Guition JC4880P443C_I_W board with an ESP32-P4 and 4.3-inch touchscreen. It reads music from a USB drive exported from Rekordbox and supports MP3, WAV and FLAC files. The system can run two DJ decks at the… |
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A Maker Built a 2.4GHz DIY Yagi With 1mm Brass Rods That Improved ESP32 RSSI From −65dBm to −52dBm A maker has built and tested a DIY 2.4-GHz directional Wi-Fi antenna using a 3D-printed frame and simple brass rods, showing how antenna geometry can significantly change the performance of an ESP32 wireless link. The experiment uses two ESP32 boards, with one acting as a Wi-Fi transmitter powered by a power bank and the other connected to a computer as the receiver. The receiver measures RSSI… |
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A Solo Dev Built an OS for ESP32 Boards and Gave Its JavaScript Engine Direct Access to the Hardware An open-source project called KryonOS is a GUI operating system for ESP32 microcontroller boards, built for use with a touch display and an SD card module. Built by a single developer who goes by Haris (GitHub handle Haris16-code) and released under the GPL-3.0 license, it adds a real touchscreen interface, a file explorer, and an app store to hardware that normally runs just one fixed program… |
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Two Bicopters Linked by a Cable Use a Motorized Winch and Sensor to Transform Into a Quadcopter Mid-Air Researchers led by R.Wang have developed a transformable aerial robot made from two small bicopters connected by a cable, allowing the system to change its shape and interact with objects without using a conventional robotic gripper. Each bicopter uses two brushless motors with tilting propellers, while the cable itself acts as the key mechanical component. One aircraft carries a motorized… |
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ESP32-Based Smart Mailbox Uses Computer Vision to Detect Packages and Trigger Motorized Doors and Alerts The project documents a fully automated smart mailbox built by Re-Crafting DIY. It integrates advanced electronics to solve practical issues like package theft, weather damage, and inadequate storage space. By repurposing an old car’s wiper motor for the door mechanism, the mailbox features a heavy-duty, motorized front door controlled by a central brain. It might have been a little too much… |
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Engineer Recreates Google's TPU Chip Design on a $60 FPGA Using Systolic Arrays and Smart Approximation A YouTube creator running the channel "traffic in the brain" has published a detailed walkthrough of building a small-scale AI accelerator from scratch on a budget FPGA board, recreating the core architectural ideas behind Google's Tensor Processing Unit (TPU).
The project, released September 17, 2026, implements a two-layer attention model, the same… |
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Researchers Show You Can Beam RF at a Stranger's Headphones and Eavesdrop on What They're Listening To A team from the Hong Kong University of Science and Technology (Guangzhou) and Hong Kong Polytechnic University has demonstrated a new eavesdropping technique that turns ordinary consumer electronics into unintentional radio transmitters, using nothing but an external RF signal and the target device's own circuitry. The attack, detailed in a paper accepted to USENIX Security 2026 and… |
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RP2350 Microcontroller Drives Full 1080p HDMI With No Framebuffer Using Scanline Technique Aaron Gayle’s TV‑Top Kiosk project shows how to squeeze a full 1920×1080 HDMI signal out of a RP2350 microcontroller, which is seen in the popular Raspberry Pi RP2350 development board. To reach 1080p, he overclocked the RP2350 to 372 MHz and used its faster peripherals to generate a DVI/HDMI signal at up to 30 Hz in 24‑bit color. The result is a tiny, low‑cost “console” stick, something like… |
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A Tiny Robot Hides Inside a 3.5-mm Poker Chip to Cheat at Roulette With 433 MHz Radio and a Custom PCB Kevin Coda of Concept Bytes Youtube channel built a tiny remote-controlled robot inside a poker chip for Mark Rober's CrunchLabs casino challenge. The project turns a standard poker chip into a miniature mobile robot that can move across a roulette table after receiving a wireless command. To make room for the electronics, the chip was hollowed out using CNC machining and its internal steel… |
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This ESP32-Powered Self-Balancing Cube Jumps With a Spring and Uses a Reaction Wheel to Land on Its Edge A maker from The Tinkering Techie has done a compact self-balancing cube that can launch itself into the air, reorient during the jump, and land upright on one of its edges. Unlike conventional self-balancing robots that continuously drive wheels against the ground, this cube uses an internal reaction wheel to control its orientation. When the motor accelerates or decelerates the spinning… |
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Maker Replicated the Boston Dynamics Gripper Using Daisy-Chained Servos and 3D-Printed Fingers Maker built a Boston Dynamics–style gripper using daisy‑chained bus servos and 3D‑printed fingers. Inspired by the Electric Atlas Humanoid Robots, the design focuses on a simple three‑finger layout with a rotating thumb to move around objects of different shapes. By linking multiple servos over a single UART bus, the build keeps wiring clean while allowing independent control of each joint for… |
