FM1922570CT6 ST7567 1.4 inch 128*64

Introduction: FM1922570CT6-33 is based on Laowang’s 1.8 yuan and 2.5 yuan POS disassembled screen,

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SSD1316-128X32 OLED module

Introduction: SSD1316 128X32 OLED module Laowang 0.8 yuan touch OLED screen

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RV-LINK WCHLINK RISC-V debugger

Introduction: The RISC-V debugger based on CH549 can also debug ARM and make improvements based on the original reason.

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GD32F350G8 development board

Introduction: Based on the GD32F350G8 development board, Laowang Store costs 4.2 yuan for two pieces.

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(verified)BilClock

Introduction: A small TV made with a 0.96-inch OLED screen, which can display the time, number of fans of Station B and countdown.

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F411 flight control

Introduction: The STM32F411 flight control of the flying machine
uses matek firmware and supports betaflight and INAV.

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BLHleli ESC

Introduction: Open source ESC
BLHleli ESC, brushless motor drive, ESC
is for reference only

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CH340C typec to ttl

Introduction: A good-looking typec to ttl module, including su-03t burning function and automatic download function.

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UPS backup power control board

Introduction: Use the hysteresis circuit of 555 to complete the automatic charging and discharging function of the battery.

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Screen cable adapter board

Introduction: Anti-customer STM32H743 core board and punctual atomic RGB screen transfer

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PCB pendant key chain

Introduction: It’s just a key chain. It’s good to hang on a U disk or a keychain.
2022-07-04 New communication big data itinerary card pendant
is hard to find. You can try the Bingdundun pendant under my project. It is open source and Some free
items come with NFC

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Touch dimmable LED filament light bulb (based on 8022W solution)

Introduction: SGL8022W or JL8022W chip can be used, no need to burn any program! Touch dimming. The brightness of the switch light gradually brightens and fades out, and the brightness of the last touch to turn off the light can be remembered.

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Variable tap 4-tube ZVS Arknights

Introduction: It can be switched to a tapped or untapped ZVS circuit according to the jumper, and contains a small amount of Arknights elements.

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ESP32_30pin expansion board

Introduction: ESP32_30pin expansion board. The board has a 5V voltage regulator circuit, which can directly power the microcontroller after connecting to the power supply. At the same time, it reserves an I2C interface, a UART interface, a 0.96-inch OLED interface, and 5V, 3.3V power supply interfaces.

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Nanjing University of Posts and Telecommunications PCB Map

Introduction: Nanjing University of Posts and Telecommunications PCB Map

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USB2USB Pro Mini-3.3v

Introduction: USB2USB Converter Board keyboard mapper base board, used with RP2040 Pro Mini core board. It is also compatible with SparkFun Pro Mini 3.3V core board.

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USB-Converter-Board

Introduction: USB2USB keyboard converter, connects SparkFun Pro Mini/Micro core board and USB Host Shield Mini expansion board.

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RP2040 Pro Mini

Introduction: It is pin-compatible with sparkfun's pro micro/mini and can be used with my USB2USB baseboard to replace the Pro mini core board.

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32u4_mu

Introduction: Tian Zi 68 complete keyboard

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Positive and negative linear regulated power supply

Introduction: A simple linear regulated power supply composed of 78xx and 79xx, which can power preamplifiers, headphone amplifiers and other applications that require positive and negative voltages.

Schematic PCB