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

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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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STEVAL-FSM01M1: ST's dual-channel digital I/O module for industrial safety applications

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High-Efficiency 65W USB-C Dual-Port Charger Reference Design with ATQ Transformer

100W USB-C dual-port charger reference design with single-stage PFC

170 W AC-DC reference design with input voltage range for e-bike and power tool battery chargers

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LibreTimeBase: Rubidium clock control board

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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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RP2040 based ohmmeter with audio and ribbon feedback

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 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.

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RDR-641 - 40 W variable output (3 V to 8 V, 5 A; 8 V – 20 V constant power) power supply using InnoSwitch3-Pro and Microchip PIC16F18325 microcontroller

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DER-350 - 20 W Isolated, Triac Dimmable, LED Driver with Power Factor Correction (>0.98)

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9.5 W Isolated Flyback, Triac Dimmable, Power Factor Correction (>0.96) LED Driver Designed Using LYTSwitchTM LYT4314E

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RDR-347 - 12.6 W, TRIAC Dimmable, Isolated Flyback, Power Factor Corrected (>0.97) LED Driver

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