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

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Open source lab-grade automated microscope

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

Schematic PCB

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

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DER-338 - Input-only low-voltage, ultra-thin, T8, isolated, 23 W, power factor corrected (PF >0.98) LED driver designed using LYTSwitch LYT4215E

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DER-364 - 14 W dimmable, high efficiency (>85%) LED driver

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DER-357 – 12 W Triac Dimmable LED Driver

This document is an engineering report describing the design of a non-isolated, buck-boost LED driver (power supply) using the LYTSwitch family device LYT4313E.
The DER-357 provides a single 12 W triac dimmable constant current output. The main design goal is to achieve high efficiency to increase luminous efficiency and reduce size. This allows the driver to fit into the BR40 lamp and be as close to the production design as possible.

Schematic PCB