Data acquisition instrument based on MM32W wireless MCU series

Introducing a simple and highly scalable application solution - a data acquisition instrument developed based on the MM32W series.

Jlink V9 DIY High Speed ​​SWD

The Jlink OB made by F072 has a maximum speed of 3000kHz, and the Jlink V9 has a maximum speed of 12000kHz.

Schematic PCB

Open source remote and wireless debugger ctxLink

Supports various Cortex-M cores, can be used wirelessly in the local area network, and can be used remotely in the external network.

Schematic PCB

CN0243

High dynamic range RF transmitter signal chain with external single frequency reference for DAC sampling clock and IQ regulator local oscillator generation

Schematic PCB

led-panel: LED panel breakout board for white LEDs

The led-panel originated from the author's desire to use a donated roll of white LEDs to break out 48 LEDs on a compact board. Its output power should reach about 4W. It has no controller and is purely for testing a set of LEDs to see if they would be suitable for some form of lighting attached to a gooseneck.

Schematic PCB

Application circuit of TLP7820 isolation amplifier (voltage detection)

Schematic PCB

CN0205

I/Q modulator ADL5375 interfaces with dual-channel, 1.2 GSPS high-speed DAC AD9122

Schematic PCB

Modular, open-source test & measurement chassis

The EEZ Bench Box 3 (BB3) represents a new class of modular test and measurement (T&M) equipment. It provides a complete open source hardware and software framework that bridges the gap between DIY hobbyist tools and professional desktop equipment and combines their best features. Inspired by the EEZ H24005 power supply, BB3 has attracted many enthusiasts with its extensive feature set, rich user interface, DIY friendliness and completely open source design. BB3 will initially feature modules that provide the same functionality as the H24005, but these modules will plug into a single device, providing improved modularity, greater capacity, more processing power, an easier-to-use interface and enhanced flexibility, all These are available in compact form factors.

Schematic PCB

Fluke early model 8020A multimeter schematic diagram

The very early model was a bit crude.

Schematic PCB

CN0238

High performance, 12-bit, 500 MSPS wideband receiver with anti-aliasing filter

Schematic PCB

esp32s2-lepton: ESP32s2 thermal imager

​ESP32s2 Thermal Imager=ESP32s2 + Lepton 3.5 + Battery charger + 240x240 pixel LCD

Schematic PCB

USB2.0 full-speed analyzer based on Raspberry Pi RP2040

This is a simple USB sniffer based on the Raspberry Pi RP2040. It supports low speed and full speed modes. The firmware presents itself as a virtual COM port (VCP), so no additional software is required and it is compatible with all operating systems.

Schematic PCB

Open source power supply EEZ BB3: based on stm32 H7 main control board, voltage supports 0-80V, current 0-10A

Schematic PCB

2020 Electrical Contest Question E-Amplifier Nonlinear Distortion Research Device (Nanjing University)

Schematic PCB

ESP32s2 CO2 Monitor

ESP32s2 CO2 Monitor=ESP32s2 + Sharp memory LCD + CO2 Monitor

Schematic PCB

300nA to 150mA measurement circuit (comes with the new STM32L5 exploration board)

ST has previously launched a board with a static current measurement range of 1nA - 100mA and a dynamic current measurement range of 100nA - 50mA, but it is not open source. This time it’s open source.

Schematic PCB

Mini-DSO - a low-cost simple oscilloscope

A simple oscilloscope made of STC8A8K MCU. The microcontroller uses STC8A8K64S4A12 working at 27MHz. The display uses a 0.96 OLED with a resolution of 128x64. This oscilloscope project is easy to start and covers the necessary measurement functions. Supports normal mode, single mode, and automatic mode. It has trigger mode selection, such as level trigger, and comes with saved settings. Mini-DSO input is single-channel mode, and the second/division size can support a variety of: 500ms, 200ms, 100ms, 50ms, 20ms, 10ms, 5ms, 2ms, 1ms, 500us, 200us, 100us, and the voltage acquisition range is 0 to 30V. The sampling rate can reach 250kHz@100us/div.

Schematic PCB

RP2040 based ohmmeter with audio and ribbon feedback

2019 Electronic Competition Question D - Simple Circuit Characteristics Test - Design Plan and Report (National First, Nanjing University of Science and Technology)

Schematic PCB

Power Profiler Kit II - Open source second-generation power measurement kit from Nordic

The Power Profiler Kit II (PPK2) is a stand-alone unit that, in addition to external hardware, can measure and optionally source current on all Nordic DK boards from sub-uA up to 1A.

Schematic PCB