2021 Question A-Signal distortion measurement device

Introduction: 2021 A-level National Secondary Examination

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Xiaomi_IoT DBS Xiaomi switch

Introduction: Xiaomi switch, supports Mijia direct connection, no programming required

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LoRa2BLE

Introduction: LoRa digital radio transmits and receives messages via Bluetooth link to mobile phones. It is intended to be a small tool for text chatting without the Internet.

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DSP: Mountain View BP1048B1

Introduction: Mountain View BP1048B1 DSP chip

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[Internet of Things] Hongmeng Internet of Things Smart WiFi Smart Switch +4212547A

Introduction: This project uses Hongmeng Hi3861 chip combined with aircraft to achieve physical wifi remote control at home or dormitory

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[Solicitation Order] ESP32 Bluetooth FM Speaker

Introduction: Use Anxinke ESP32-S development version to receive Bluetooth, output the I2S signal to UDA1334 for decoding, and the audio signal switches the ESP32-S Bluetooth, FM, and AUX audio sources to PAM8406 through the CD4052 switch.

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2.4G Yagi Antenna

Introduction: Improved based on the existing antenna on the forum, the original antenna is connected to https://oshwhub.com/kxxxxc/yagi_ant

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PB-03Kit

Introduction: The smallest development board designed using pb03 module

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Tmall Elf’s multi-hole sub-controlled smart power strip

Introduction: Using Essence's side plug-in module, you can use wifi or Bluetooth to connect to the Alibaba Cloud IoT platform and control it through Tmall Genie.

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RGB constant current driver for ESP32-C3

Introduction: Use ESP32-C3 as the main controller and three buck-type constant current chips to control RGB lights. It is directly connected to the Alibaba Cloud platform. It can hotspot network distribution and control and OTA upgrade of the Alibaba Cloud platform. It can be controlled by Tmall Genie, but HSV color correction cannot be done. It can be turned on and off.

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2021 Electronic Competition F Question Country 2

Introduction: The design uses grayscale morphology to preprocess the acquired images, and combines it with a convolutional neural network constructed based on Keras to achieve rapid recognition of ward numbers in 163ms, with an accuracy of up to 95%;

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tuya multi-mode gateway (verified)

Introduction: A development-free multi-mode gateway based on Tuya Smart

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ESP32 C3 data collector

ESP32 C3 module. TYPE-C, battery, OLED grayscale screen, magnetic interface to connect external sensors

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Software and hardware open source portable monitor CatSniffer (schematic diagram, PCB, source code, etc.)

This board is a Swiss Army Knife for IoT security researchers, developers, and enthusiasts. The board can be used with different types of software, including third-party sniffers such as SmartRF Packet Sniffer, Sniffle, zigbee2mqtt, Z-Stack-firmware, Ubiqua Protocol Analyzer, our custom firmware, or you can even Specific software requires writing your own software.

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USB Armory Mk II: Small Open Source USB Computer for Security Applications

The USB armory Mk II is a full-featured computer (900 MHz ARM® processor, 512 MB RAM, Bluetooth, USB-C) in a small form factor, designed from the ground up with information security applications in mind.

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GoWired Multiprotocol Gateway: The versatile hub for all wired communications

The GoWired Multi-Protocol Gateway is an evolution of one of our previous development boards, the GetWired Ethernet Gateway, with more power, more features, more functionality and a better solution for wired automation systems. It features a powerful ARM M0+ microcontroller with 8x the ROM and 16x the RAM memory. We doubled the RS485 transceiver to be able to use two different communication protocols simultaneously (MySensors, MODBUS, etc.) and added a CAN transceiver as it is also widely used in home automation. USB obviously has to be included as well. To ensure reliable Ethernet communication, we use the market-leading Wiznet W5500 chip. The microcontroller internal memory can be expanded via SD card, for example. G. Used to collect debugging information. The GoWired multi-protocol gateway also features improved power circuitry and can now handle a voltage range of 7-26 VDC. Onboard current and power monitors can periodically share power-related data, as well as other information about device status. For example, an e-ink screen can be used to display this information. All of this is designed with reliability and safety in mind, especially in terms of power supply (ESD, overcurrent, overvoltage, reverse polarity protection) and EMC and EMI precautions. The device is housed in a compact four-slot DIN rail enclosure.

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CaribouLite RPi HAT: Fully open source dual-channel SDR Raspberry Pi HAT with tuning range up to 6 GHz (schematic, PCB, source code, etc.)

CaribouLite is an affordable open source dual-channel software-defined radio (SDR) platform and an SDR-focused FPGA development framework implemented as a Raspberry Pi (RPi) HAT. CaribouLite turns your Raspberry Pi single-board computer (SBC) into a standalone dual-channel radio Tx/Rx with a tunable spectrum up to 6 GHz. CaribouLite gives you complete control over its hardware, including FPGA, firmware, and all supporting software. With the deeply integrated IceStorm toolchain, writing your own FPGA applications couldn't be easier. You can reuse many Verilog modules, such as the SPI and SMI modules, to support custom applications for CaribouLite hardware.

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smart spoon

Introduction: Gyroscope, Bluetooth

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Tuya Smart Platform IoT Lighting Project

Introduction: IoT RGB small lamp based on Tuya Smart Platform

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Remote computer boot card

Based on the WIFI remote computer boot card project, some modifications have been made

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