Light source controller

Mainly using GD32F350 to make a light source controller to provide stable light source control for machine vision cameras, adding an external trigger function that can be connected to an external 24V signal (photoelectric sensor or PLC input), and a 24V output signal to trigger the camera to take pictures. Due to the diversity of application scenarios here, it is necessary to add user process configuration to control how long and when the four light sources are turned on respectively. Due to the life of the light source and the general glare of the light source, a parameter power-off retention function is added. In addition, it is also extended WIFI function. Live application scenarios are also tested in the video.

Schematic PCB

Initial implementation of solar tracker

This design only implements the establishment of the basic framework, such as protocols, business processing, task processing, upper and lower computer interaction data, etc., and abstracts interfaces one by one, and calculates the solar altitude angle and azimuth angle at this time through SPA. Simply use the obtained azimuth angle, altitude angle, etc. to convert the PWM duty cycle to control the corresponding rotation of the servo. There is actually a lot that needs to be done.

Schematic PCB

4A CNC regulated power supply design

Two outputs: 1: 0-30V/4A 2: 5V/1.5A (fixed output) Voltage resolution 0.458mV, current resolution 0.076mA Voltage step 0.0073V, the actual 0.1V step adjustment reset circuit is Both 51 and AVR are compatible. You can't solder all four original components. You can solder the reset circuit according to which chip you use!

Schematic PCB

45 W USB-PD Ethernet Power Flyback Converter

45 W 24 V Ethernet power flyback converter

Engineer safety black box

As China's title of "Infrastructure Maniac" becomes widely known, more and more workers are engaged in dangerous jobs, such as high altitude, underground, tunnels, and engineering vehicles. In order to ensure the safety of these construction workers and ensure timely rescue in the event of an accident, I designed this safety black box for engineering personnel. This equipment can collect the heart rate of construction workers, the temperature and humidity of the surrounding environment, identify the state of movement, and determine whether a fall or collision accident has occurred. It is transmitted to the remote monitoring center through the network. Once the monitoring personnel find an abnormality, they can immediately organize rescue.

Ultrasonic standing wave axial suspension moving device

With the in-depth research of ultrasonic levitation technology by domestic and foreign scholars, ultrasonic levitation devices have developed from expensive horns and other equipment to structures composed of general-purpose commercial ultrasonic transducers. Combined with 3D model printing technology, any scientific researcher and Electronics enthusiasts can use these components to make ultrasonic levitation devices to facilitate related acoustic research. This technology was published in AIP Publishing by Asier Marzo et al. Based on its model, this design changes the main control MCU, uses the timer inside the MCU to generate accurate PWM waves, and improves the software so that the ultrasonic device can move the suspension stably during the axial suspension movement. Small objects in multiple nodes.

Schematic PCB

ZigBee USB Virtual Gateway Reference Design Using EM3588

ZigBee USB Virtual Gateway Reference Design Using EM3588

Schematic PCB

Intelligent battery management system

This solution is an electronic device that can monitor and manage the battery. This solution uses an MCU-based intelligent protection board, which has the advantages of convenient parameter adjustment, high flexibility, and better functional design.

Fingerprint recognition

This solution is a pattern recognition system that includes fingerprint image acquisition, processing, feature extraction and comparison modules. It can complete fingerprint identification within 1 second and also provides a hardware encryption and decryption engine to completely protect the internal database and transmitted data. .

fan

This solution uses a motor to convert electrical energy into wind, and provides 3 sets of PWM outputs with complementary and dead zone functions, high-speed A/D converters, and comparators to drive brushless DC motors.

face recognition

This solution provides a higher level of security, supports dual CMOS cameras and TFT LCD display devices, and can add 3D facial recognition. It can also transmit all attendance data to the background for recording via Ethernet.

electric bicycle

This solution uses a PWM module with built-in dead zone control suitable for three-phase motor applications, and is protected by a hardware module to directly shut down the PWM in emergency situations and protect the power transistors from being burned under abnormal operations.

smart card reader

The Nano120 series used in this solution has passed EMV 2000 and China PBOC3.0 of Level 1 contact certification. It is used in USB transfer payment card readers and has ISO7816-3x3 smart card interface, anti-tamper detection pins, and anti-theft copy lock code bit functions. , 96-bit UID chip unique code, 128-bit UCID customer unique code, strong anti-interference ability (8kV ESD, EFT 4kV) and other features.

Schematic PCB

Face recognition attendance machine

This solution integrates the face recognition function into a microprocessor, allowing customers to save costs and use a smaller PCB to complete the product.

Industrial Remote Control Unit (RTU)

This solution can be used to remotely monitor and control various equipment and systems to achieve automated multi-purpose equipment. It has a very small PCB two-layer circuit board and supports a variety of network protocols and can support up to 10 sets of UART devices.

Interactive Human Machine Interface Solutions

The average power consumption of this solution during standby is < 1 μA, and it can maintain standby state with low power consumption, and the data is still maintained when the power is turned off. This solution uses the LoRa transmission protocol to implement wireless update data function. Any host device can send data through the LoRa host module to update the electronic paper display content.

Schematic PCB

OCEANSIDE (MAXREFDES9#): 3.3V to 15V input, ±15V (±12V) output, isolated power supply

This document details the Oceanside (MAXREFDES9#) subsystem reference design, a 3.3V to 15V input, ±15V (±12V) output, isolated power supply. The Oceanside design includes a high-efficiency step-up controller, a 36V H-bridge transformer driver for isolated supplies, a wide input range, and a pair of adjustable output low dropout (LDO) linear regulator. Test results and hardware files are included.

Schematic PCB

SANTA FE (MAXREFDES5#): 16-bit, high-precision, multiple-input, isolated analog front end (AFE)

This document explains how the Santa Fe (MAXREFDES5#) subsystem reference design meets the higher resolution, higher voltage, and isolation needs of industrial control and industrial automation applications. Hardware and firmware design files as well as FFTs and histograms from lab measurements are provided.

Schematic PCB

FREMONT (MAXREFDES6#): 16-bit, high-precision, 0 to 100mV input, isolated analog front end (AFE)

The Fremont (MAXREFDES6#) subsystem reference design meets the high-resolution needs of low-voltage output sensor applications. Boards for purchase, hardware and firmware design files, and FFTs and histograms from lab measurements provide complete system information for rapid prototyping and development.

Schematic PCB