FM Cube (FM cube)

Introduction: The width and height of the micro FM radio adopts the OLED board size of 28.5x27mm. The solution used is: STM8S001J3 + RDA5807M. It has 30 radio station storage spaces and can select channels: preset radio stations, set frequencies, manual station search, and automatic station search.

Schematic PCB

[Single-chip microcomputer] CNC adjustable voltage stabilized power supply design-V1.0

Introduction: CNC adjustable DC regulated power supply

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Lichuang EDA textbook STM32F103RCT6 core board

Introduction: It has been verified that it is available. I wanted to change it later, but I never had time to change it. I backed it up as the original PCB.

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stc microcontroller automatic downloader

Introduction: The stc series microcontroller automatic downloader can realize automatic downloading with one click. You don’t have to cut off the power yourself. It is easy to use after testing.

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m.2 STM32+ESP32 IoT minimum system board

Introduction: The smallest system board of stm32RC+ESP32-C3

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ch343g serial communication four-level version

Introduction: CH343 multi-level version

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[Complete Design] TFT LCD digital BOOST boost circuit

Introduction: Design a digital BOOST circuit and use LCD to display power mode and performance parameters.

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Resource usage indicator

Introduction: Project based on STC8G1K08

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QC2.0 decoy

Introduction: QC2.0 decoder designed based on STC8G1K08-8PIN, supports 5v/9v/12v three-speed output.

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[Cost 5 yuan] DotMatrix 24x16

Introduction: 24x16 Uart dot matrix screen based on STC8G1K08A-8Pin

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[Cost less than 10 yuan] Keyboard with free setting of single key/combination key mapping

Introduction: Contains 5 customizable mechanical buttons. Users can freely edit the function of each button offline, and it will be automatically saved after power off, so there is no need to edit it again next time it is started. Supports single key mapping (such as regular keys AZ, 0-9, etc.) and combined key mapping (such as Ctrl+C, Ctrl+V, etc.).

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STC8G1K08A minimum system

Introduction: STC8G1K08A minimal system

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[Open Source] STM32 four-axis remote control

Introduction: A four-axis remote control based on the open source four-axis version of RoboFly.

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[Open Source] STM32 quadcopter-old version

Introduction: A quadcopter made with reference to Xiaoma Ge’s RoboFly open source quadcopter

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Gesture recognition module based on stm32 and paj7620u2 sensor

Introduction: The sensor course design uses paj7620u2 sensor and stm32 sensor, which can recognize 9 kinds of gestures and control the small fan with gestures.

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FEVSPIN32G4VB

Introduction: The evaluation board EVSPIN32G4 is copied from ST’s newly launched motor-specific MCU—STSPIN32G4VB.

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STM32-SFOC-TMC6200

Introduction: SimpleFOC, a high-power version for driving 42BLDC

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2021 Question B three-phase AC-DC conversion circuit has one god and two pits

Introduction: This system is based on the AC-DC voltage synchronous rectification circuit of BOOST boost PFC to achieve the design requirements. At the DC-DC end, a voltage phase-locked loop and a current phase-locked loop are used to stabilize the DC output, and PID technology is used to stabilize the output. The load regulation rate and voltage regulation rate are both less than 0.3%.

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PIC compatible microcontroller learning aid

Introduction: A kind of analog programming flash timing of 2-bit microcontroller. Amateur players can use CH551/552 to make, and amateurs use this IO type microcontroller.

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STC8H8K64U-LQFP48 core board_

Introduction: STC8H8K64U_LQFP48 core board. Use STC8G1K to implement cold start of download.

Schematic PCB