Based on STM32L496 smart water cup holder

This work designs a smart water cup holder that can detect the use status of the water cup and remind users to drink water in time. By connecting to the Alibaba Cloud platform, automatic clock calibration is achieved. You can also set parameters for the water cup holder on the cloud terminal. The main work of this project is to design a beautiful interface that is pleasing to the eye. The other is to connect to Alibaba Cloud to realize cloud sharing and intelligent connection.

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Intimate Photo Frame - Network weather digital photo frame based on STM32H745

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Open Source SMD Reflow Soldering

500W 200mm x 100mm hot plate with designed housing.

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HealthyPi 5: open source biosignal acquisition board

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Open source USB2.0 high-speed analyzer

The analyzer host computer directly uses Wireshark. The hardware is implemented using Cypress CY7C68013A MCU + Lattice LCMXO2 FPGA + Microchip USB3343 USB PHY

Schematic PCB

W487304AS1C1_garage board

1-layer PCB 50.1 x 79.9 mm FR-4, 1.6 mm, 1, tinned with leads, blue solder mask, white silkscreen;

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atmega8-328 prototype board: good voltage filtering function

This board was created for the mcudude library and has good voltage filtering, reducing reset time via a c10 capacitor (10nF!!) on the dtr line of a ch340 system. It would be nice to solder a precision socket under the x1 oscillator, it gives you the opportunity to try different frequencies (useful for rs232 communication for example)​

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POGO ISP Micro: Small and reliable programming adapter for AVR ISP

Do you need a small ISP to program your onboard AVR device? POGO ISP Micro is the right solution!

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10x10x10 LED cube

The project is a cube shaped 10x10x10 LED matrix controlled by a serial interface.

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Teacher ChaN’s AC load analyzer

Supports voltage, current, effective power, apparent power, power factor, frequency, and harmonic component display.

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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.

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PYPRCA: python programmable open source calculator based on Raspberry Pi PICO, developed using circuitpython

Pocket calculator style general purpose programmable device (computer) ideal for learning programming and improving building/soldering skills.

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Raspberry Pi RP2040 direct drive DVI/HDMI interface display cool display

These demos all use Adafruit's PicoDVI branch, which makes the video framebuffer look like a regular Adafruit_GFX object, which makes drawing very easy.

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PicoCray: 9 Raspberry Pi pico RP2040 for parallel computing

The PicoCray project connects multiple Raspberry Pi Pico microcontroller modules into a parallel architecture, utilizing the I2C bus to communicate between nodes

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Open source headphone design based on RP2040 and PCM3060

All files are open source, including software, hardware and 3D printing shells, and how to make and assemble them are described in detail, especially the EQ equalization filter test and frequency response test are explained in detail. The main control uses RP2040 + TI 24-bit asynchronous stereo audio codec PCM3060 with 96/192kHz sampling rate.

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Open source smart cooling plate design based on PIC16F17146

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ESP32+RP2040 two-in-one design board (schematic and PCB)

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Using Raspberry Pi Pico, a miniature Mars probe with an arm (schematic, PCB, 3D printing, source code, etc.)

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Open source plankton monitoring and analysis equipment PlanktoScope

Plankton help remediate 30-50% of the world's carbon dioxide and provide the foundation for the global food chain, making up the world's largest daily movement of biomass as it travels across the ocean. The shapes, colors, and movements of these billions of creatures are as vast as the oceans that sustain them. Understanding plankton is crucial to understanding the world around us and our impact on it.

One obstacle to this type of research is the sheer size of the area to be explored, as well as limited resources for research fleets and specialized equipment. By developing a method to scale up high-quality visual exploration and documentation, we can greatly increase our understanding of the complex web of life around us, and how we in turn influence it.

Schematic PCB

Self-soldering PCB board design that supports reflow soldering (including PCB, schematic diagram, source code, etc.)

After the user manually solders a PCB board, this board becomes the reflow controller, and then this board can be used to control other boards for reflow soldering, because this board has been specially designed to open a heating layer.

Schematic PCB