Sky-Star Extension Board

Preface:
This expansion board, specifically designed for the LCSC SkyStar development board, offers great convenience with its compact 10cm square size and free PCB fabrication service. It features a rich array of peripheral interfaces, including two servo interfaces, two buttons, LEDs, an active buzzer, a TB6612 motor control module, a Bluetooth communication module, an OpenMV communication/TTL module, an MPU-6050 module, and a 0.96-inch OLED screen module. The board also features the SkyStar logo and the LCSC logo, enhancing product brand recognition.
Power Supply :

The expansion board uses a 12V DC power connector for power supply stability. A reverse polarity protection diode is installed at the power input to effectively prevent damage caused by reverse polarity. Additionally, a slide switch allows for easy power control.
This expansion board features a meticulously designed two-stage power conversion circuit to ensure a stable power supply for peripherals with varying voltage requirements:
a. To step down the 12V DC input to 5V, a Texas Instruments TPS5430DDAR DC-DC step-down converter is used. This chip is known for its high efficiency and stability, making it suitable for providing the required 5V power to onboard devices;
b. Further stepping down the 5V to 3.3V utilizes an AMS1117-3.3LDO low-dropout linear regulator. This regulator is favored for its low noise and high-precision output, ensuring a stable 3.3V power supply for voltage-sensitive electronic devices.

The expansion board measures 10cm x 10cm and can be custom-made free of charge by JLCPCB.
Designed with electronic competition needs in mind, this expansion board integrates multiple functional modules to support a wide range of applications:
it features two servo interfaces for convenient control of robotic arms or other precision motion devices;
two buttons for easy user interaction and simple control logic;
integrated LEDs for status indication or visual feedback;
and an integrated active buzzer for audible alerts.
It can be equipped with the TB6612 motor control module, capable of driving dual motors, suitable for projects requiring motor control.
It can also be equipped with a Bluetooth communication module, allowing wireless connectivity and remote control.
It provides an OpenMV communication and TTL module interface, supporting image processing and machine vision tasks.
It can be equipped with an MPU-6050 module for motion tracking and attitude detection.
It can also be equipped with a 0.96-inch OLED screen module for displaying information and a user interface.


The expansion board's port design uses a 2x20 header with a 2.54mm pitch, facilitating connection and expansion with other devices or modules. Other features

include the SkyStar logo and the JLCPCB logo, as
well as SkyStar development board installation instructions (SWD is the compilation and programming header area).