Magnetic levitation system based on STM32F407

Support revolution, fixed height, side floating

Schematic PCB

Wee Noise Makers PGB-1: Open Source Audio Synthesizer

Schematic PCB

Tildagon: EMF reusable electronic badge, beyond 2024

Schematic PCB

Quadrant: Gesture audio adjustment based on 4 TOF sensors

Schematic PCB

A low-profile version of full-featured software radio based on Raspberry Pi Pico (fully open source + detailed explanation)

With just a Raspberry Pi Pico, an analog switch and an op amp, you can build a powerful SDR receiver covering the LW, MW and SW bands. Capable of receiving signals from halfway around the world.

Schematic PCB

Mock Badge for the 2023 Hackaday Competition (Open Source)

This year, Supercon badges become analog badges! (Or at least pretend to be pretty convincing.) Taking inspiration from the fluorescent oscilloscopes of the past, the 2023 Vectorscope badge is part analog audio playground, part art project, and all about prototyping. Who doesn't love the warm glow and lovely green fluorescence of an old Tektronix tube scope?

Schematic PCB

OpenEarable open source in-ear wireless headphones (finished version)

OpenEarable aims to enable ear-based sensing applications by providing a flexible open source hardware platform. It integrates a range of sensors, including a 9-axis inertial measurement unit, ear canal pressure and temperature sensors, inward-facing ultrasound microphone, speakers, buttons and controllable RGB LEDs. With these capabilities, OpenEarable provides researchers and developers with the ability to explore a variety of application scenarios.

OpenEarable controls and transmits sensor data via BLE (Bluetooth Low Energy). Audio is played from or recorded to the internal SD card. OpenEarable is compatible with the provided dashboard and Edge-ml.

Schematic PCB

Open source 12-lead portable electrocardiograph

This open source has a complete host computer, slave computer and schematic diagram, as well as a detailed design paper.

Schematic PCB

The early mobile phone system PalmOS was ported to Raspberry Pi RP2040

Schematic PCB

Single-button keyboard based on ESP32-S3 with color screen

Schematic PCB

2018 Electronic Competition Question F-Wireless Microphone Amplification System (Xidian University)

Schematic PCB

2018 Electronic Competition Question F-Wireless Microphone Amplification System (Dalian University of Technology)

Schematic PCB

2018 Electronic Competition Question F-Wireless Microphone Amplification System (Harbin Engineering University)

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (Xidian University)

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (Shandong University)

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (First Prize in Hebei Province)

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (Guangxi Guilin University of Electronic Science and Technology)

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (Anhui University)

Schematic PCB

2019 E-Contest Question K-Simple Multifunctional Liquid Container (Chongqing Division)

Schematic PCB

2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (Dalian University of Technology)

Schematic PCB