Magnetic levitation system based on STM32F407

Support revolution, fixed height, side floating

Schematic PCB

ardEEG: Low-cost brain-computer interface supporting 8-channel EEG, EMG and ECG biosignal measurements

Schematic PCB

Wee Noise Makers PGB-1: Open Source Audio Synthesizer

Schematic PCB

Glider: Open-source Eink monitor with low latency (including detailed explanation of Elink principle)

Schematic PCB

Hackbat: Open source hacker hardware platform based on RP2040, penetration testing tool

Schematic PCB

Tildagon: EMF reusable electronic badge, beyond 2024

Schematic PCB

LibreTimeBase: Rubidium clock control board

Schematic PCB

Green Smart BMS: Intelligent Battery Management System

The project originated when the author purchased an electric motorcycle for his daughter and replaced its original lead-acid gel battery with a lithium battery pack. Due to the lack of smart, cheap and easy to configure lithium battery management systems on the market, the author decided to make one himself.

Schematic PCB

Quadrant: Gesture audio adjustment based on 4 TOF sensors

Schematic PCB

RP2040 based ohmmeter with audio and ribbon feedback

Open ECU control module

Schematic PCB

Open source power supply EEZ BB3: based on stm32 H7 main control board, voltage supports 0-80V, current 0-10A

Schematic PCB

Bus Pirate 5: Open source serial, SPI, I2C and 1-Wire development tools

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

Open source USB PD powered mini SMD reflow heating plate

A low-cost PD-powered reflow soldering heating plate that uses a cermet heater (MCH) instead of a PCB heating plate for heating. It has a USB Type-C input port and can be powered by a 60W (65W) PD power supply.

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

Open source EtherCAT servo driver board design

Schematic PCB

Bicycle speed measurement based on Hall sensor

Ultra-simple Hall sensor speed measurement, the value is displayed on the 16x02 LCD display

Schematic PCB

Spark Analyzer: open source wireless USB PD power supply with power consumption analysis

Spark Analyzer is fully compatible with USB-C PD, ensuring compatibility with a wide range of devices and applications. Precisely control voltage levels to meet your project needs. Switches to 5V, 9V, 15V and 20V to accurately measure the current draw of your project. Understand your power needs and optimize accordingly.

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