ArduPilot: Open source flight control APM and PIXHAWK (schematic and source code)

APM (ArduPilotMega) is a flight control product launched by the DIY Drones community in 2007. It is the most mature open source hardware project today.

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For smart devices, SABER board based on i.MX 6SoloX application processor

The SABER board for smart devices is based on the i.MX 6SoloX processor and supports 4-core processing, low-power multimedia and graphics applications.

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OLED-Boy, a mini OLED game console based on ATmega328P

This is an open source work by netizen aziddy, based on the classic Adafruit Feather 328P development board (the MCU master is Microchip's ATmega328P) and a mini electronic game console with a 128x64 OLED screen

Zhihuijun produces portable pocket monitor & power bank

Zhihui Jun designed and produced a portable pocket monitor (& power bank) to solve personal pain points. There is no room for improvement in terms of appearance~

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ESP8266 multi-function ink screen

Arduino development, weather, clock, reading, network distribution and other functions

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DIY personal laptop

The author specially bought a laptop motherboard, and then DIYed the peripherals and casing. The overall effect is quite beautiful.

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Open source micro-racing car based on ESP32H2, inspired by Mario Kart

This is a fun electronic toy car that features power-ups! The author uses color sensors and magnetic switches to trigger fun tricks like acceleration, deceleration, and rotation. It draws a lot of inspiration from Mario Kart.

After a failed Kickstarter campaign, the author has now open-sourced the software, hardware, and mechanics.

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S32G reference design for automotive network processing 2

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MCIMX8QXP-CPU: i.MX 8QuadXPlus Multi-Sensor Enablement Kit (MEK)

NXP MEK provides a platform for evaluation and development of the i.MX 8X series of application processors based on Arm Cortex A35 + Cortex-M4F.

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LS1043A Residential Gateway Reference Design

OpenWRT Residential Gateway Home Router Platform.

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CN0105

16-bit 10 MSPS ADC AD7626 single-ended to differential high-speed drive circuit

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Solar MPPT charge controller

This design is a 20A maximum power point tracking (MPPT) solar charge controller designed for solar panel input corresponding to 12V and 24V panels. This design is intended for small to medium power solar charger solutions, capable of operating from 12V/24V panels and 12V/24V batteries with output currents up to 20A. This design focuses on scalability and can easily be adapted to a 48V system by changing the MOSFETs to 100V rated parts. The user can also increase the current to 40A by using a TO-220 package version of the current MOSFET. This solar MPPT charge controller is designed with real-world considerations in mind, including reverse battery protection and software-programmable alarms and indications that are provided in the hardware but not configured. This design operates at greater than 97% efficiency at full load in a 24V system. For a 12V system, the efficiency is greater than 96%, which includes losses in the reverse-battery protection MOSFET.

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Smart RV control system

The home facilities on the RV include: lighting, sofas, seats, air conditioners, TVs, stereos and other electrical appliances. It is inconvenient to set independent switches for each appliance. The smart RV control system solves such problems. The deep learning speech recognition technology of artificial intelligence technology achieved a breakthrough in 2013, and the voice interaction method will occupy an important position for a long time after the technological breakthrough. Large-size touch screens are also the development trend of vehicle-mounted human-computer interaction equipment in recent years. This system uses speech recognition and display human-machine interface (HMI) as human-computer interaction equipment, and users control electrical appliances through voice and touch screen.

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CN0269

18-bit, 1.33 MSPS, 16-channel data acquisition system

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Multi-parameter patient vital signs monitor front-end reference design

This reference design is for a multiparameter front end of a patient monitor that measures vital sign parameters like ECG, heart rate, SpO2 and respiration.it uses biosensing front end integrated circuits like the AFE4403 and ADS1292R devices, to measure these parameters. It also uses three TMP117 sensors to accurately measure skin temperature. This design can interface with the pace detection module to detect the pace pulse. The design also uses an isolated UART connection to transfer data to a computer. The entire front end subsytem runs on a rechargeable 3.7V li ion battery.

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Frequency Probe - an ultra-miniature frequency probe

An ultra-mini frequency probe designed by foreign expert David Johnson. This frequency probe can help you debug the circuit by displaying frequency and voltage. It can measure periodic waveforms from 1Hz to 5MHz with an accuracy of 0.3%. Of course, it can also be used as a voltmeter. Use it to tell you the current voltage value.

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USB Type-C and USB PD Controller Power Switch/High-Speed ​​Multiplexer Reference Design

TIDA-00714 TI Design is a complete TPS65982-based reference design for USB Type-C and power delivery applications. Allows users to develop various power profiles and alternate modes (such as DisplayPort) and debug existing USB Type-C and power delivery systems.

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NXP Automotive Networks GoldBox

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Design and implementation source code of solar power generation simulation system based on TMS320F28335

Design and implementation of solar power generation simulation system based on TMS320F28335

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6-digit handheld open source multimeter

Software and hardware are all open source

Schematic PCB