UnPhone, an IoT platform based on esp32s3 (with a 300-page IoT textbook)

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Open source lab-grade automated microscope

Reverse Engineering and Repair of LeCroy High Frequency Active Probe HFP2500

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Pomelo, a low-power, open-source gamma-ray spectrometer

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HealthyPi Move: Open source, smart health watch that is as good as professional ones

Supports continuous or intermittent monitoring of important biometric signals such as ECG, heart rate, HRV, PPG, SpO₂, blood pressure trend and respiration. It integrates daily use and advanced research applications.

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Tesla Roadster open source design data (battery monitoring board, vehicle display system, HVAC controller, diagnostic software)

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Open source calculator CG-35, RPN calculator similar to HP-35

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Magnetic levitation system based on STM32F407

Support revolution, fixed height, side floating

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

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Wee Noise Makers PGB-1: Open Source Audio Synthesizer

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

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

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Tildagon: EMF reusable electronic badge, beyond 2024

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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.

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Open ECU control module

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

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

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Open source EtherCAT servo driver board design

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small engine control

This reference design board supports the NXP® MM912_P812 engine control IC, which combines an MCU (S12P) and an analog control chip (MC33812), and is suitable for motorcycles and other single/double-cylinder small engine control applications.

The analog control IC consists of three integrated low-side drivers, a pre-driver, a +5.0 V voltage pre-regulator, an MCU watchdog circuit, an ISO 9141 K-Line interface and a parallel interface for MCU communication.

The archived content will no longer be updated and is for historical reference only.

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Class D Audio Amplifier Reference Design

The 1000W Class D Audio Amplifier Reference Design provides examples of audio amplifiers and push-pull power converters. It runs using the KV1x Tower® Series platform or the k64 Freedom board.​

Schematic PCB