Open Source USB Analyzer

The software and hardware are all open source.

Schematic PCB

Open source current probe based on Rogowski coil

Schematic PCB

CN0155

Implement precision electronic scale design using the 24-bit Σ-Δ ADC AD7195 with built-in PGA and AC excitation

Schematic PCB

E8300-001-GEVB: Ezairo 8300: High-End Audio DSP for Wireless Hearing Aids and Hearables

Diansai source code three-phase electronic multi-function energy meter

It is mainly composed of the basic functions and structure of the professional electric energy measurement chip ATT7022B and the single-chip computer MSP430F149 system. In terms of hardware circuits, the electromagnetic compatibility of the circuit is fully considered in the circuit design. A more reliable power supply for electric energy meters is designed to improve the ability to withstand lightning strikes. And it is proposed to use EPROM to store data in order to achieve the purpose of simplicity and security. In the particularly critical communication unit of the electronic energy meter, multiple communication methods such as serial communication and wireless communication are designed to connect scattered electricity meters into a network to achieve centralized control and remote meter reading functions. In addition, a GPS module is designed to locate the coordinates of the collection point.

Schematic PCB

100W LED Lighting Power Supply

This reference design provides design guidelines, data and other content for a constant current 100W power supply for LED lighting with PFC and wide input voltage range (i.e. AC 90V to 264V).

Schematic PCB

OpenSimpleLidar: Open source laser rangefinder for SLAM and navigation

This is a very simple open source scanning laser rangefinder. It uses triangulation. Its components cost less than $35 (excluding shipping). This lidar is very useful in robotics - for SLAM and navigation tasks.

Schematic PCB

Agilent E3631A DC power supply schematic diagram

Several 51 chips were also used in the design.

Schematic PCB

DER-712 - 60W ultra-wide input range adapter using InnoSwitch3-EP PowiGaN and MinE-CAP

60 W isolated flyback adapter with StackFET™ using MinE-CAP ICs to achieve the highest possible power density and design simplicity

Schematic PCB

CN0186

Phase Coherent FSK Modulator

Schematic PCB

CANable: A small, low-cost, open-source USB-to-CAN adapter based on stm32f0

CANable 2.0 is a small, low-cost, open-source USB to CAN adapter. CANable enumerates as a virtual serial port on your computer and acts as a serial line to CAN bus interface. Using the alternative candleLight firmware, CANable enumerates as a native CAN interface on Linux. CANable 2.0 supports standard CAN and CAN-FD.

The CANable adapter is compatible with ARM-based embedded platforms such as Raspberry Pi, Raspberry Pi Zero, ODROID, BeagleBone, etc., making it ideal for integration into OEM products.

Schematic PCB

DER-931 - 72 W industrial/home appliance power supply using InnoSwitch4-CZ, ClampZero and MinE-CAP

72 W ultra-compact charger/adapter for appliances and industrial applications

Schematic PCB

51 microcontroller ultrasonic ranging program

The ultrasonic ranging system based on a single-chip microcomputer measures the output pulse width, that is, the time interval between transmitting and receiving ultrasonic waves. It controls the peripheral circuits in a timely manner through the single-chip microcomputer and provides signals such as frequency oscillation, data processing, and decoding display to the peripheral circuits. The ultrasonic transmitting circuit includes a gate control circuit (RS flip-flop) and a differential/shaping circuit, while the receiving circuit consists of receiving, amplifying, signal filtering, and shaping circuits.

Schematic PCB

CN0180

Precision single-supply differential ADC driver for industrial-grade signals

Schematic PCB

CN0191

20-bit, linear, low-noise, precision, bipolar ±10V DC voltage source

Schematic PCB

Digital oscilloscope design based on STM32 (schematic diagram, source program, etc.)

Digital oscilloscope design based on STM32, including schematic diagram and source program, etc.

Schematic PCB

2018 Electronic Competition Question A-Current Signal Detection Device (Tianjin)

Schematic PCB

Open source handheld vector network analyzer NanoVNA

NanoVNA is a small handheld vector network analyzer with LCD display and battery-powered portable device. This project aims to provide a useful RF gadget.
The measurement frequency range is 50KHz - 300MHz, and there are many derivatives based on this design on the Internet.

Schematic PCB

RDR-877 - 6W isolated flyback power supply, using LinkSwitch-TNZ to generate AC zero-crossing signals losslessly

6 W isolated flyback power supply with lossless generation of AC zero-crossing signal using LinkSwitch-TNZ (LNK3306D)

Schematic PCB

CN0157

Universal Serial Bus (USB) Hub Isolator Circuit

Schematic PCB