FRDM-KW36: Freedom Development Kit for Kinetis ^{® KW36/35 MCUs}

FRDM-KW36 is a development kit for the KW35/36 MCU that provides connectivity for Bluetooth Low Energy (BLE) v5. KW36 integrates CAN/CAN-FD connection.

Schematic PCB

Fully open source reflow soldering Reflow-Controller: based on ESP32-S2, magic oven modification

Reflow-Controller is designed to control different types of reflow ovens, hot plates, etc. It's based on the ESP32-S2, so it can be programmed to work with WiFi applications, but it also has an onboard OLED display and three buttons for use as a standalone solution.

Schematic PCB

255 W, 80PLUS® Silver Certified ATX Power Supply GreenPoint® Reference Design

Wireless security camera based on ESP32

Have you ever wanted to install a security camera in your home, garden or office? Although commercial Wi-Fi security cameras on the market are not expensive, if you want to install multiple ones in different scenes or rooms, it will cost a lot of money. Young engineer Max can develop a wireless security camera based on Espressif's ESP32 chip with only $15.

Schematic PCB

Line voltage frequency monitor

The author noticed that the AC line frequency changes in spans of 0.4 Hz and periods of several minutes, so I wanted to examine long-term changes in AC line frequency and voltage. This is a project to build a line voltage frequency monitor. It is not a complete instrument but a simple measurement adapter designed to be embedded in some measurement system with a PC or microcontroller.

Schematic PCB

Plant Bot: an open source project for caring for potted plants based on ESP32

Plant Bot is an open source project based on ESP32 that allows a single PCB to perform the functions of detecting humidity, watering, providing lighting, and controlling and communicating with the user via WiFi/BLE.

Schematic PCB

Based on IFX007T BLDC motor and DC brush motor driver

This BLDC motor driver board is capable of driving one BLDC motor, or one or two bidirectional DC motors (H-bridge configuration, cascaded to support a second motor) or up to three unidirectional DC motors (half-bridge configuration).

Schematic PCB

QorIQ ^® LS1012A Development Board

The LS1012A-RDB is a compact tool that can be used to evaluate LS1012A solutions for consumer electronics, industrial control and networking applications.

Schematic PCB

Design 8-channel asynchronous ADC acquisition into synchronous acquisition through phase compensation

A phase compensation algorithm is used to compensate for the additional phase delay introduced by the multiplexed ADC, thereby producing an effect equivalent to a synchronously sampled ADC.

Schematic PCB

PETALUMA (MAXREFDES30#): 8-channel simultaneous sampling analog front end

The Petaluma (MAXREFDES30#) subsystem reference design is a cost optimized, high-speed and high-accuracy analog measurement solution for three-phase power monitoring applications. Hardware, firmware, design files, and lab measurements provide complete system information for rapid prototyping and development.

Schematic PCB

The world's first ARM core aerospace grade chip, SAMRH71F20-EK evaluation kit (schematic, etc.)

The Microchip SAMRH71F20-EK Evaluation Kit is a hardware platform for evaluating the SAMRH71F20 microcontroller.
Powered by Microchip's MPLAB® HARMONY integrated development platform and other commercially available development environments, the evaluation kit provides easy access to the Microchip RadHard SAMRH71F20 microcontroller and its aerospace-specific feature set and shows how to integrate the device into a custom design.

Schematic PCB

Production Line Tool launched by Dialog

The software part of this tool (including the host computer) is not open source, but the schematic diagram and PCB related files are.

Schematic PCB

Stanford Pupper: an open source quadruped robot dog

The Stanford Pupper is a four-legged robot designed to help K-12 and undergraduate students engage in exciting robotics research.

Schematic PCB

SCD30-3d-model: 3d model of the SCD30 CO2 sensor

The design is a custom 3d model from Sensirion. Sensirion provides a 3d model, but it has very few features.

Schematic PCB

60 W USB-PD and Quick Charge 3.0 Buck-Boost Reference Design Documentation Package

pcie_x4: SYZYGY creates PCIe x4 add-in card

SYZYGY is an FPGA extension standard for medium to high speed interfaces. This breakout connects the SerDes in the SYZYGY-TXR connector to the card edge to act as a PCIe x4 add-in card. This breakout is very simple and can be made into a shorter SYZYGY pod.

Schematic PCB

MAXREFDES62#: RS-485 communication micro PLC card

The MAXREFDES62# reference design ushers in the era of Industry 4.0. With dual RS-485 communication channels for the next generation of ultra-small programmable logic controllers, this design meets the data rate and higher voltage needs of industrial control and industrial automation applications, while consuming minimal power and space. This high-performance system features one half-duplex RS-485 transceiver, one full-duplex RS-485 transceiver, a complete, efficient power-supply system and on-board processing. Hardware and firmware design files as well as results of lab measurements are provided.

PiEEG: A brain-computer interface based on Raspberry Pi that can measure EEG, EMG and ECG biological signals

A Raspberry Pi board is used as the processor to process eight brain electrical signals in real time.

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

pmod-gnss：GNSS PMOD、GPS + Glonass

This design is a PMOD with the ublox NEO GNSS receiver footprint. Able to receive GPS and GLONASS simultaneously.

Schematic PCB