Hardware circuit realizes SPI to Ethernet 10BASE-T

It introduces in detail how to build an SPI to 10BASE-T to realize network data sending and receiving. 10BASE-T uses two differential pairs: one for transmission and one for reception. Each pair is coupled through a transformer and the signals are differential and Manchester encoded. All schematics and diagrams are open.

Schematic PCB

ESP32-CAM-WEB camera

Modified from the ESP32 Arduino routine "CameraWebServer" 1. Treat ESP32 as a web server. You can see the camera monitoring screen and control it through browser access. 2. Mainly change the web page from English to Chinese and delete some functions. 3. Added control functions for servos, motors, relays, and LEDs. 4. Through this program, you can easily create a wireless reconnaissance robot with ESP32.

Schematic PCB

ChipWhisperer-Husky: Handheld Channel Power Analysis and Fault Injection Tool

ChipWhisperer-Husky is a compact package for experimental side-channel power analysis and fault injection. It follows in the footsteps of our ChipWhisperer-Lite and ChipWhisperer-Pro products and adds new features such as a high-speed logic analyzer for visualizing faults, real-time data streaming for attacking asymmetric algorithms, and additional I/O Extension pins.

Schematic PCB

Freescale smart car source code photovoltaic group (with comments)

Freescale smart car smart car source code photoelectric group (with comments)

Schematic PCB

Obstacle measuring car

A car with intelligent judgment function is designed and produced. The car has the following functions: automatic obstacle avoidance function; tracking function (driving according to the black track on the road); phototaxis function (finding the point light source in front and driving in place); It has the function of detecting the number of iron pieces placed on the road surface; it calculates and displays the distance traveled and the walking time, and can make sounds and light up. The work can be used as a high-end smart toy, or as a powerful application example for college students to learn embedded control.

Schematic PCB

C language program for stepper motor controlled by 51 microcontroller

C language program for stepper motor controlled by 51 microcontroller

Schematic PCB

Design of armed police sentry linkage alarm system based on STM32, supporting Ethernet and WIFI communication (hardware, source code, papers, etc.)

The armed police alarm information system terminal proposed in this article can realize alarm and linkage response, supports two communication modes of Ethernet and WIFI, and can realize mobile sentry alarm and fixed sentry alarm. The voice and display alarm information can be customized by users.

Schematic PCB

Open source writing machine design

The author introduces the classic corexy structure writing machine.

Schematic PCB

2020 Electronic Competition Question D-Obstacle Avoidance Aircraft (Dalian University of Technology)

Schematic PCB

2018 Electronic Competition Question A-Current Signal Detection Device (Sichuan University of Electronic Science and Technology)

Schematic PCB

2017 Electronic Competition H Question-Remote Amplitude and Frequency Characteristics Test Device-Shengyi Works-Circuit Scheme

Schematic PCB

2019 National Electronic Design Competition National Second Prize Code for Question D (Simple Circuit Characteristics Tester)

Schematic PCB

AUTOSAR_Fee implementation source code

Schematic PCB

Open source smart cooling plate design based on PIC16F17146

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Smart home control system based on STM32L432

Smart home control system, with embedded source code and Android source code

Schematic PCB

TI smart socket

WIFI remote can control the socket and monitor power consumption, etc. It has similar functions to Xiaomi smart socket, using TI's MSP series microprocessor as the main control.

Schematic PCB

Automatic round trip car report based on Launch_pad (program + schematic + PCB)

The MSP430 microcontroller is used as the detection and control core of the car; a photoelectric sensor is used to detect the black belt on the road, and the feedback signal is sent to the MSP430 microcontroller, so that the MPS430 microcontroller controls the car to drive at a predetermined speed in each area according to the predetermined working mode, and The MSP430 microcontroller can control driving in different directions depending on the working mode selected; the Hall element A44E is used to detect the driving speed of the car; the 1602LCD is used to display the driving time of the car in real time. After the car stops driving, the driving time, driving distance and each speed zone of the car are displayed in turn. Travel time. This design has a simple structure and is relatively easy to implement, but it is highly intelligent and humane, and reflects intelligence to a certain extent.

Schematic PCB

DM9000 EMI test circuit reference

DM9000 EMI test circuit reference

Schematic PCB

Steno-Flex: An innovative, cheap, customizable shorthand

Steno-Flex is a unique, low-cost stenotype that matches standard stenotype layouts and key actions. By using flexible keys with touch sensors, Steno-Flex is able to simplify the stenotype's design and mechanics, making Steno-Flex lighter and less expensive than current stenotypes on the market. Steno-Flex uses modern materials and electronic equipment, combined with computers, to allow students and novices to develop shorthand skills. Just plug the USB cable into your computer, launch the open source shorthand software Plover, and you're ready to go. Provides online tutorials and guides. Steno-Flex is an effective device for people who want to learn shorthand and develop real-time speech transcription. Shorthand technology is evolving to become the standard solution for data entry, from simple keyboards to sophisticated shorthand controls.

Schematic PCB

syzygy-flir-boson: SYZYGY boson LWIR core

Plug-in for FLIR's boson LWIR kernel. The 24-bit CMOS channel is connected through the SYZYGY connector along with the UART configuration channel.​

Schematic PCB