AD9684 Evaluation Board for Sampling Wide Bandwidth Analog Signals

Schematic PCB

The EVAL-AD5520EB, AD5520 evaluation board is a single-channel, per-pin parametric measurement unit (PPMU) for use in semiconductor automatic test equipment

Schematic PCB

Using AD5516-3, 16-channel serial digital-to-analog converter

Schematic PCB

AC Ohmmeter mR-71 Remake

Schematic PCB

2017 Electronic Competition H Question-Remote Amplitude and Frequency Characteristics Test Device-Shengyi Works-Circuit Scheme

Schematic PCB

2017 National College Student Electronic Design Competition Question H-Remote Amplitude and Frequency Characteristics Tester-Paper

Schematic PCB

2017 Electronic Competition H Question-Remote Amplitude-Frequency Characteristics Test Device-Design Plan and Report (3 National Awards)

Schematic PCB

2019 E-Contest Question K-Simple Multifunctional Liquid Container (Chongqing Division)

Schematic PCB

2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (Chengdu University of Information Science and Technology)

Schematic PCB

2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (Dalian University of Technology)

Schematic PCB

2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (East China Jiaotong University Institute of Technology)

Schematic PCB

Full open source reverse "blasting" tool

Through this open source tool, everyone can better understand how program firmware is "exploded", thereby improving product security. Crack AES, crack RSA, crack DES and so on.

Schematic PCB

Fully open source nV level measuring instrument (super awesome, including PCB, schematic diagram, firmware, etc.)

This awesome project comes from the nV-level measurement instrument challenge launched by xDevs. The project requirements are relatively difficult and only one author has completed it. The author has open sourced all project materials and provided detailed explanations (in English).

Schematic PCB

FreeEEG32: Affordable, stackable, open source, 32-channel EEG

FreeEEG32 is a stackable, open source, 32-channel, 24-bit, sigma-delta, simultaneous sampling board designed to meet the needs of scientists and brain hackers who require high-quality, affordable research-grade equipment. We have been developing this EEG for many years as we worked to create the ultimate open source solution to expensive proprietary EEG technology. FreeEEG32 combines four 8-channel AD7771 ADCs with ultra-low noise (<0.22 μV measured) sources and references, all driven by the powerful STM32H7 ARM Cortex-M7, while handling pre-processing. It's sensitive enough to handle high-quality EEG data collection and more.

Schematic PCB

BioAmp EXG Pill: Professional small, powerful analog front end (AFE) biopotential signal acquisition board (schematic, PCB, software, etc.)

The BioAmp EXG Pill is a powerful small analog front end (AFE) biopotential signal acquisition board that pairs with any microcontroller unit (MCU) or single board computer (SBC) with an analog-to-digital converter (ADC)) Such as Arduino UNO & Nano, Espressif ESP32, Adafruit QtPy, STM32 Blue Pill, BeagleBone Black and Raspberry Pi Pico, just to name a few. It also works with any dedicated ADC such as Texas Instruments ADS1115 and ADS131M0x etc.

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

MAXREFDES1213: Smart electronic load using the MAX32630FTHR and MAX11311

The MAXREFDES1213 is a reference design showcasing the MAX32630FTHR and MAX11311, as well as several other Maxim products, that demonstrates a small size, low-cost, portable electronic load (E-load) for testing power converters and PMICs.

Schematic PCB

TI high-speed oscilloscope reference design (sampling rate 12.8Gsps, bandwidth 6GHz, 12bit resolution)

The complete PCB related files are open source, and there is also a design document for reference and study.

Schematic PCB

Phase locked loop ADF4350

Phase locked loop designed based on ADF4350

Schematic PCB

A digital signal generator based on AD9850

Digital signal generator based on AD9850 

Schematic PCB