Fluke 17b multimeter schematic diagram

Fluke 17b multimeter schematic diagram

Schematic PCB

Rodeostat: Potentiometer for electrochemistry, fully open source

It's all open source, and their documentation is very detailed, which is a rare learning material.

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A digital signal generator based on AD9850

Digital signal generator based on AD9850 

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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.

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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.

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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.

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Fluke early model 8020A multimeter schematic diagram

The very early model was a bit crude.

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

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esp32s2-lepton: ESP32s2 thermal imager

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

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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.

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

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ESP32s2 CO2 Monitor

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

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

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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

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.

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Lazy self-care fish tank control system

The lazy self-care fish tank control system is mainly aimed at fish farming enthusiasts. As long as you use your mobile phone through BLE, you can manually control the start, stop, and feeding of the fish tank's electrical appliances. At the same time, the real-time time, supplementary lighting time, automatic feeding time, water temperature monitoring and alarm, etc. can be set through the APP at once. Enthusiasts are only responsible for watching and appreciating the fish, and the other things are left to the control system!

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RP2040 based ohmmeter with audio and ribbon feedback

OpenGlass: AI glasses based on ESP32S3, costing more than 100 yuan to copy

​You can record your life anytime and anywhere, remember people's names, calculate food calories, translate in real time, and have intelligent conversations...

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