P100C electronic load made with STC8H1K17

Introduction: It is modified based on the semi-open source work of Digital Home friend @大刀杀 Pig. Measures 0-120V, current 0-15A, power 100W, fully CNC, low production cost.

Schematic PCB

#The7thLiChuangElectricityContest#USB Charging Monitor

Introduction: USB ammeter based on National Technology N32G430C8L7 chip + INA199

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Adjustable brightness table lamp

Introduction: 2021 Ti Cup K Title Intelligent Adjustable Brightness Desk Lamp

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Four-channel electronic load/battery capacity tester

Multi-channel electronic load/battery capacity tester based on STM32G0 low-cost solution

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Super mini UART tool

USB to UART, a compact and powerful serial port tool that supports voltage isolation and electrostatic protection

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Multifunctional heating table controller

A compact and versatile heating table controller

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Analog and five-digit source meter/ammeter (2) display part

This is the second part of the first part

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STM32 simple instrumentation

A simple gadget that integrates a simple oscilloscope, a simple function signal generator, resistance measurement, an adjustable power supply, and an output current measurement.

Schematic PCB

Analog and five-digit source meter/ammeter (1) control part

A dual-display source meter that combines analog-digital fast response and digital readout. It can also be used as an ammeter.

This is a multi-purpose indicator meter that can be used as a USB source meter or an ordinary ammeter.

Schematic PCB

Agilent power supply schematic diagram

The complete circuit diagram can be used directly for circuit design reference. Simple CNC DC power supply, core power circuit part. Including AC and DC input parts, the pre-voltage regulation part is helpful for dispersing the heat of power devices; input and output protection, startup delay, communication functions; voltage control, current control, overvoltage and overcurrent protection;

Schematic PCB

PIC30v voltmeter schematic diagram

The 30v voltmeter made with PIC16f676 includes schematic diagram and source program.

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Foreign powerful, simple and portable oscilloscope design (schematic diagram, PCB, program source code, etc.)

Foreign powerful, simple and portable oscilloscope design (schematic diagram, PCB, program source code, etc.)

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Oscilloscope source code based on stm32f4

A good source code for stm32f4 oscilloscope, which can use 3-channel ADC to measure waveforms and display the waveforms on the screen and also display the amplitude.

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High efficiency digital power solution source code

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21-channel 120Msps Raspberry Pi microcontroller logic analyzer

Using Raspberry Pi pico (rp2040) as logic analyzer and oscilloscope with sigrok

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Based on the portable soldering iron open source system IronOS, download the full set of open source materials for Pinecil V1 (software, hardware, etc.)

The portable soldering iron launched by PINE64 in the early days was based on the GD32 design. This time it was upgraded to the second generation product, which was changed to the domestically produced BL706. Its feature is that it supports low-power Bluetooth. The Bluetooth OTA upgrade function will be added to IronOS later. IronOS supports a variety of portable DC, QC, and PD powered soldering irons, and supports all standard functions of smart soldering irons.

Schematic PCB

Based on the 5 yuan Raspberry Pi RP2040, 24-channel 100Msps logic analyzer open source project

The hardware is independently completed by the Raspberry Pi microcontroller RP2040, which costs 5 yuan a piece. Just close a trigger design baseboard designed by KiCAD. The software is created using VSCode + GCC + Cmake. It doesn’t matter if you don’t know how to use it. The firmware is upgraded using the U disk drag-and-drop method that comes with the Raspberry Pi chip.

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

ERASynth Micro: USB-powered, low-cost, open-source RF signal generator

ERASynth Micro is an open source signal generator with impressive features. Affordable for everyone including builders, hackers, students, amateur radio and SDR users. The ERASynth Micro is powered via the USB port and has an LCD interface for stand-alone use without the need for a computer or phone. It can generate low phase noise RF signals from 12.5 MHz to 6.4 GHz through a dual PLL architecture.

Schematic PCB

EEZ Bench Box 3: Modular, open source test and measurement chassis that’s more than just a programmable DC power supply

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