CH334R-based USB Hub

PDF_USB Hub Based on CH334R.zip

Altium_CH334R-based USB Hub.zip

PADS_CH334R-based USB Hub.zip

BOM_CH334R-based USB Hub.xlsx

93972

OLED clock design based on ESP01S

OLED clock design based on ESP01S

The OLED clock design based on ESP01S consists of three parts: a power charging module, a display module, and the ESP01S minimum system.

fans_clock_esp01s-main.zip

PDF_OLED Clock Design Based on ESP01S.zip

Altium_OLED Clock Design Based on ESP01S.zip

PADS_OLED Clock Design Based on ESP01S.zip

BOM_OLED Clock Design Based on ESP01S.xlsx

93973

ESP32C3 development board

An ESP32C3 development board designed with reference to the LCSC ESP32S3 development board form factor.

This is an ESP32C3 development board designed based on the LCSC ESP32S3 development board layout. It features 8MB of onboard Flash memory and supports onboard JTAG debugging. The antenna design, also based on the LCSC ESP32S3 development board, works flawlessly and functions correctly.

PDF_esp32c3 development board.zip

Altium_esp32c3 development board.zip

PADS_esp32c3 development board.zip

BOM_esp32c3 development board.xlsx

93975

STC8H8K64U Minimum System

This development board adopts a through-hole modular design, facilitating the plug-and-play selection of various modules. If additional modules are needed, DuPont wires can be used for connection. All I/O pins are brought out.

I. Briefly explain the precautions for the welding process in
          the 3D preview image.
   Below is the welding preview image;
  the default is 5V welding. If you choose 3.3V voltage, please note the following:
Position 1 (USB download) does not require welding;
position 2 (sense sensor experiment DS18B20/infrared/DHT11 module, change to round hole pin)
; position 3 (IO→P32, silkscreen SW5);
position 4 (no welding required if not needed); FLASH expansion and 5V to 3.3V logic, all can be welded when VCC is 5V in the above image.
The arrow indicates the FPC LCD display socket, selectively weldable if needed;
the power supply interface also provides a TYPE-C interface, if your soldering skills are not solid, you can choose to weld USB-A, or both.
Also, serial ports P30 and P31 are brought out separately for convenient serial port experiments and for downloading programs to the microcontroller using your own serial port module.
The LCD screen uses a 22P standard interface. As shown in the diagram below
 
 
, the second step is to download the program
 
        using the latest STC-ISP software from the official STC company. The default settings are as follows: select 35MHz for the crystal oscillator.
         Then, confirm the jumper cap is correct as
shown in the diagram below: Select 5V for position 1. For position 2, I'm temporarily using a jumper cap; the actual position should be a press-button switch for easy downloading and power-on. Select the left side of the USB port for position 3.
First, press and hold SW5 (P32). After powering on again (marked 2), the following image will appear:
The serial port will display "HID". Release SW5, open the file, and download.
 
 
The third step is program testing
 
  . After soldering, you can download the OLED test program I provided. Source code is also provided for
the OLED: 0.96-inch, SPI 7-pin, control chip SSD1306.
 
The fourth step involves some I/O ports being combined for easier use of hardware I2C and SPI, offering both software and hardware driver options. This is for you to explore.
 
 
 
 
 
 
 

STC8H8K64U0.96OLED_SPI_Examples.zip

OLED.hex

STC8H8K64U.mp4

stcai-isp-v6.94F.zip

PDF_STC8H8K64U Minimal System.zip

Altium_STC8H8K64U Minimal System.zip

PADS_STC8H8K64U Minimal System.zip

BOM_STC8H8K64U Minimum System.xlsx

93976

MP2236-5V Power Conversion Module

5V step-down module based on MP2236 chip (verified)

This 5V 6A high-current step-down chip is suitable for powering servos and motors. It features
adjustable output (simply modify one resistor value according to the datasheet)
and a wide voltage input range.

MPS-MP2236.pdf

PDF_MP2236-5V Power Conversion Module.zip

Altium_MP2236-5V Power Conversion Module.zip

PADS_MP2236-5V Power Conversion Module.zip

BOM_MP2236-5V Power Conversion Module.xlsx

93979

Fan controller

The GP9101-F20K-L2H1-SW is used as the ADC chip to output PWM control for a four-wire computer fan.

The GP9101-F20K-L2H1-SW is used as the ADC chip to output PWM control for a four-wire computer fan. A diode is added to prevent excessive current from being generated when the fan is turned off. A bracket is designed to work with a variant of the Noctua fan's open-source fan shroud, suitable for office desktop fans. The PWM signal pins have select pads; pin 1 connected to pin P reduces airflow when the potentiometer is rotated in the off direction, while pin 2 connected to pin P does the opposite. Bracket adapter
download address: https://makerworld.com.cn/zh/models/195395#profileId-122615
Fan shroud download address: https://www.printables.com/model/896133-nv-aa1-12-airflow-amplifier-trunnion-mount The fan shroud must be the version with a fixed lug distance of 135!
Fan cover: https://makerworld.com.cn/zh/models/171909#profileId-123350
The ph2.0 socket is not needed.