• Zhihuijun's new work: Hanwen smart keyboard with FOC force feedback knob, multi-function, modular mechanical keyboard (schematic, firmware, etc.)

    The keyboard uses a modular design. The multi-functional scene interaction module on the left can be replaced with various custom components. By default, a Dynamic component with an e-ink screen and FOC force feedback knob is used; the keyboard body uses a shift register method to implement the key scanning circuit; The module and keyboard body can be used alone, or they can communicate and call each other through the serial port protocol.

    Schematic PCB

  • SimplePnP: an open source PCB placement machine for personal use (including design files, schematics, source code, software, etc.)

    SimplePnP is designed to be reliable, accurate, affordable, and adaptable to a wide range of components. It's a great choice for electronics startups, inventors, researchers, and hacker spaces.

    Schematic PCB

  • CANT: CAN bus simulation implementation

    There are many I/O methods that simulate UART, SPI, and I2C protocols, but there are very few that simulate CAN protocols. The CANT introduced today is a CAN bus simulation implementation. The original project was demonstrated on the ST Micro Nucleo-H743ZI board. The author recently launched a C and Python package - canhack, which facilitates porting to various chips without CAN.

    Schematic PCB

  • Software and hardware open source portable monitor CatSniffer (schematic diagram, PCB, source code, etc.)

    This board is a Swiss Army Knife for IoT security researchers, developers, and enthusiasts. The board can be used with different types of software, including third-party sniffers such as SmartRF Packet Sniffer, Sniffle, zigbee2mqtt, Z-Stack-firmware, Ubiqua Protocol Analyzer, our custom firmware, or you can even Specific software requires writing your own software.

    Schematic PCB

  • Implementing ultra-low-cost dual fiber optic network card 100BASE-FX based on Raspberry Pi microcontroller (open source software and hardware)

    The Raspberry Pi microcontroller itself does not have an Ethernet MAC, but it can be easily implemented through the programmable IO of the Raspberry Pi. The programmable PIO of the Raspberry Pi microcontroller that costs 5 yuan a piece is indeed a miracle, with IO below 250MHz. Control everything.

    Schematic PCB

  • Based on the 5 yuan Raspberry Pi RP2040, 24-channel 100Msps logic analyzer open source project

    The hardware is independently completed by the Raspberry Pi microcontroller RP2040, which costs 5 yuan a piece. Just close a trigger design baseboard designed by KiCAD. The software is created using VSCode + GCC + Cmake. It doesn’t matter if you don’t know how to use it. The firmware is upgraded using the U disk drag-and-drop method that comes with the Raspberry Pi chip.

    Schematic PCB

  • Wigl Kit: Create your own music-loving robot (including schematics, source code, etc.)

    Wigl can hear the notes of any instrument and respond with movements, lights and special dances! Wigl helps motivate children and adults to practice their instruments. By sequencing the notes, you can program special dance moves for your Wigl. This combination of right-brain creativity and left-brain logic makes it a unique robot for any home. How does WIG work? Wigl has a microphone, a microcontroller (brain) and some motors for movement. Wigl is always listening for notes, and through some complex math it can hear individual notes.

    Schematic PCB

  • easySwitchBox: Remote LoRa® wall switch powered by coin cell battery and Arduino IDE

    easySwitchBox does one simple thing - it sends an on/off signal to any relay, actuator or other item. It can be used to trigger any event wirelessly and over long distances (even up to several kilometers using LoRa®). Programming is easy using the Arduino IDE, and communication is protected by a certified chip. easySwitchBox not only makes your projects more efficient, but also looks more professional.

    Schematic PCB

  • HEGduino: Measure real-time cerebral blood oxygen levels (all open source)

    Uses infrared light sensing to determine changes in blood oxygen levels in the brain in real time. Use the device in less than ten minutes to learn how to directly change blood flow to your brain. Neurons do not store energy, so regional brain activity is closely related to changes in blood oxygenation, where healthy blood flow patterns are essential for high function and growth of the brain.

    Schematic PCB

  • HealthyPi v4 - Unplugged: Wireless, wearable, open source vital signs monitor powered by ESP32

    Reliable health monitoring has traditionally required us to tether ourselves to machines that record our vital signs around the clock. However, outside of clinical settings this is rarely practical. We developed HealthyPi v4 in part to address this challenge. Building on its predecessor, HealthyPi v4 is a fully open source standalone vital signs monitor with wireless and wearable capabilities.

    Schematic PCB

  • Modular, open-source test & measurement chassis

    The EEZ Bench Box 3 (BB3) represents a new class of modular test and measurement (T&M) equipment. It provides a complete open source hardware and software framework that bridges the gap between DIY hobbyist tools and professional desktop equipment and combines their best features. Inspired by the EEZ H24005 power supply, BB3 has attracted many enthusiasts with its extensive feature set, rich user interface, DIY friendliness and completely open source design. BB3 will initially feature modules that provide the same functionality as the H24005, but these modules will plug into a single device, providing improved modularity, greater capacity, more processing power, an easier-to-use interface and enhanced flexibility, all These are available in compact form factors.

    Schematic PCB

  • Dreamweaver 4N: Four-note sequencer (PCB, schematic, source code, etc.) for creating unique music in real time

    Dreamweaver 4N is a four-note sequencer with potentiometers, allowing users to create their own unique music.

    Schematic PCB

  • The Skull CTF: Guessing Skull Game Tool

    The Skull is a Capture the Flag (CTF) puzzle that invites you to explore the innards of the AVR architecture. It has multiple stages that may keep you busy for days or even weeks as you flex your brain muscles and apply them to her riddles. Unless, of course, your mind loses its grip on reality and you fall into a swirling void of madness with no anchor. In this case, it may take you longer. To keep your head above water, you need three things: the ability to read and understand Arduino code, a willingness to spend some time reading the ATtiny45 datasheet, and basic programming skills.

    Schematic PCB

  • Eduponics Mini: ESP32-powered smart agriculture IoT kit with user-customizable mobile app

    STEMinds Eduponics Mini is a smart agriculture and IoT board. With an ESP32 module at its core, Eduponics Mini features an array of built-in sensors - including temperature, humidity, air pressure, ambient light, water and soil moisture sensors - that work together to make smart farming simple and affordable. It supports Wi-Fi and Bluetooth connectivity and consumes very little power, making it ideal for real-world IoT applications. We believe that high-quality industrial IoT and smart agriculture technology should be accessible to everyone, not just those with significant resources and technical expertise. Using MicroPython or the Arduino IDE, you can design your smart garden in no time. We've collected all the documentation you need to guide you step by step into the world of electronics and programming.

    Schematic PCB

  • RoverWing: Adafruit Feathe expansion board that makes building complex robots easy

    The RoverWing is an expansion board (or "wing", following Adafruit's terminology) for the Adafruit Feather board that provides motor drivers that can handle 6-12 V motors, an inertial motion unit (IMU), and common servos, acoustics, etc. for mobile robots. Connectivity ports for GPS, GPS and other peripherals. Affordable, with powerful Arduino libraries and excellent documentation. It also contains a microcontroller with preloaded firmware to control these peripherals, which communicates with the Feather board using the I²C protocol, thereby freeing up the Feather board's resources for other uses.

    Schematic PCB

  • ANAVI Macro Pad 2: Open Source Programmable Two-Button Mechanical Keyboard with Backlight

    Every key on the ANAVI Macro Pad 2 can be reprogrammed to be used as a macro or even as a dedicated shortcut key, making it ideal for many applications in a variety of industries.

    Schematic PCB

  • Steno-Flex: An innovative, cheap, customizable shorthand

    Steno-Flex is a unique, low-cost stenotype that matches standard stenotype layouts and key actions. By using flexible keys with touch sensors, Steno-Flex is able to simplify the stenotype's design and mechanics, making Steno-Flex lighter and less expensive than current stenotypes on the market. Steno-Flex uses modern materials and electronic equipment, combined with computers, to allow students and novices to develop shorthand skills. Just plug the USB cable into your computer, launch the open source shorthand software Plover, and you're ready to go. Provides online tutorials and guides. Steno-Flex is an effective device for people who want to learn shorthand and develop real-time speech transcription. Shorthand technology is evolving to become the standard solution for data entry, from simple keyboards to sophisticated shorthand controls.

    Schematic PCB

  • ATtiny Flasher: Open hardware flash tool for Atmel ATtiny

    ATtiny Flasher is a convenient device that allows you to use your favorite IDE and debugging tools when developing for ATtiny microcontrollers. Enjoy the classic Arduino development experience while using bare metal. Whether you're a design engineer, a hobbyist, or someone just starting to program MCUs, ATtiny Flasher can help you—without having to port your code to the target platform when you're done.

    Schematic PCB

  • FreeEEG32: Affordable, stackable, open source, 32-channel EEG

    FreeEEG32 is a stackable, open source, 32-channel, 24-bit, sigma-delta, simultaneous sampling board designed to meet the needs of scientists and brain hackers who require high-quality, affordable research-grade equipment. We have been developing this EEG for many years as we worked to create the ultimate open source solution to expensive proprietary EEG technology. FreeEEG32 combines four 8-channel AD7771 ADCs with ultra-low noise (<0.22 μV measured) sources and references, all driven by the powerful STM32H7 ARM Cortex-M7, while handling pre-processing. It's sensitive enough to handle high-quality EEG data collection and more.

    Schematic PCB

  • ChipWhisperer-Husky: Handheld Channel Power Analysis and Fault Injection Tool

    ChipWhisperer-Husky is a compact package for experimental side-channel power analysis and fault injection. It follows in the footsteps of our ChipWhisperer-Lite and ChipWhisperer-Pro products and adds new features such as a high-speed logic analyzer for visualizing faults, real-time data streaming for attacking asymmetric algorithms, and additional I/O Extension pins.

    Schematic PCB

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