Hardware design is difficult, but Nordic is all open source, and PCB, BOM, Gerber, schematics, etc. are all provided. The schematic is also annotated.
This project started with STM32F1 and now it uses STM32F3.
μSMUs are not meant to replace precision SMUs, but to complement them in cost-sensitive areas where accuracy is not required.
The complete PCB related files are open source, and there is also a design document for reference and study.
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.
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.
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.
The biggest feature of testing the power consumption of IoT devices is the high dynamic range, a few uA in the sleep state and hundreds of mA in the transmitting state, and it supports dynamic switching of the measurement range. The open source power meter ZS1100A has a dynamic measurement range of 1uA to 1.5A, a resolution of 100nA, and an accuracy of 1% ± 200 nA, which is very good.
7 W Wide-Range Input, Dual Output, Non-Isolated Flyback Converter Using LinkSwitch-XT2 900 V (LNK3696P)
6.6 W wide-range input, dual output, isolated flyback converter for anti-magnetizing interference in utility meters using 900 V LinkSwitch-XT2 (LNK3696P)
10 W isolated flyback power supply with lossless generation of AC zero-crossing signal and X capacitor discharge using LinkSwitch-TNZ (LNK3317D)
6 W isolated flyback power supply with lossless generation of AC zero-crossing signal using LinkSwitch-TNZ (LNK3306D)
1.44 W Non-Isolated Buck Converter Using LinkSwitch-TN2 900 V (LNK3294G/P)
DI-164 - 1 W, Low Cost, Linear Replacement Power SupplyEliminates Need For Input Electrolytic Capacitor
72 W ultra-compact charger/adapter for appliances and industrial applications
This document is an engineering report describing a 5 A CV/CC charger (3 V to 8 V range), which switches to constant power in the 8 V to 20 V range using the InnoSwitch3-Pro and Microchip’s PIC16F18325 microcontroller. PIC16F18325 controls the InnoSwitch3-Pro via an I2C interface, programming its COMMAND and telemetry registers. This design shows the high power density and efficiency that is possible from the high level of integration in the InnoSwitch3-Pro controller. The report contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.
60 W isolated flyback adapter with StackFET™ using MinE-CAP ICs to achieve the highest possible power density and design simplicity
Quark based on ESP32 is an open source electronic tool that integrates electronic measurement probes and debugging tools. It has a wireless connection function and can be connected to APP.
tCam-Mini is a small wireless thermal camera designed and developed by Dan Julio based on ESP32, which allows users to easily obtain and use radiation data through the Flir Lepton 3.5 sensor. It can obtain the temperature of each pixel and perform various types of thermal imaging analysis; it can also convert the data into color images to display the temperature and shape of the human body through thermal imaging.
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