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

Fluke early model 8020A multimeter schematic diagram

The very early model was a bit crude.

Schematic PCB

Fluke 17b multimeter schematic diagram

Fluke 17b multimeter schematic diagram

Schematic PCB

Schematic diagram of the 34401A desktop 6.5-digit multimeter released on the Agilent official website

The schematic is in the appendix at the end of the document.

Schematic PCB

Open source LCR table design

This work is written by Jean-Jacques Aubry

Schematic PCB

Nordic open source second generation power consumption measurement kit Power Profiler Kit II

Hardware design is difficult, but Nordic is all open source, and PCB, BOM, Gerber, schematics, etc. are all provided. The schematic is also annotated.

Schematic PCB

An open source multimeter suitable for DIY

This project started with STM32F1 and now it uses STM32F3.

Schematic PCB

Source Measure Unit μSMU Open Source Project

μSMUs are not meant to replace precision SMUs, but to complement them in cost-sensitive areas where accuracy is not required.

Schematic PCB

Open Source USB Analyzer

The software and hardware are all open source.

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

Open source SMU precision power supply equipment

The SMU is a precision power supply device that can measure not only high-resolution voltage sources but also high-resolution current sources. It also integrates bipolar voltage and four-quadrant output functions to facilitate testing of various characteristics. By providing a linear sweep voltage and sweep current, the IV characteristic curve of the instrument can be obtained.

Schematic PCB

Open source power supply EEZ BB3: voltage support 0-80V, current 0-10A

Inspired by the EEZ H24005 programmable power supply project, which has attracted many enthusiasts with its feature set, rich user interface, DIY friendliness and completely open source hardware and software design.

Schematic PCB

ZYNQ version of high-performance open source oscilloscope: 1Gsps sampling rate, 100MHz bandwidth, capture rate 22000 wfm/s, Raspberry Pi for waveform rendering

The biggest feature of this open source oscilloscope is its strong waveform rendering (afterglow/fluorescence) effect. At the beginning, the author used Raspberry Pi Module 3, which can render 22,000 frames per second. In the later stage, NVIDIA Jetson is used, which can render 130,000 frames. frame. ZYNQ's FPGA is responsible for triggering and data acquisition, and A9 is responsible for transmitting data to the Raspberry Pi. Then the Raspberry Pi does the display processing. The ADC uses 1Gsps HMCAD1511.

Schematic PCB

Offline serial port monitor based on MSP430G2553

Introduction: A useless offline serial port monitor using MSP430G2553 as the main control, similar to the serial port assistant on the computer

Schematic PCB

[Zhejiang University of Science and Technology Electrical Competition] Various Waveform Generators (Question E)

Introduction: Based on microcontroller, 74LS74D flip-flop, LM324 operational amplifier and other chips, it forms a minimal electronic system that can generate square waves, triangle waves, sine waves and other waveforms, and can complete frequency setting and display.

Schematic PCB

Multifunctional PCB ruler

Introduction: A multi-functional PCB ruler that not only integrates the PCB package of most commonly used components, but can also be used as a pad, etc.

Schematic PCB

USB power meter with QC3.0 adjustable output voltage

Introduction: This design is a USB power meter with QC3.0 adjustable output voltage.

Schematic PCB

DAPlink for Type-C interface

Introduction: DAPlink based on Type-C interface

Schematic PCB

Distinguished USB cement resistor dummy load

Introduction: Distinguished USB cement resistor dummy load

Schematic PCB

CNC power supply produced by sHMIctrl smart screen

Introduction: Small CNC power supply in DC-DC mode

Schematic PCB