USB indicator light

This project is used to verify the solution verification board design of Lichuang Mall microcontroller CH551G.

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This design is a programmable colorful LED that plugs into a USB port. This is useful for indicating errors, task progress, and abnormal conditions, especially when no monitor is connected, and can also help identify specific working conditions in many similar computers.

2812 is one of the common peripherals used by every developer who studies embedded systems. It is also one of the peripherals that every hardware engineer often chooses when learning PCB design. Therefore, this project uses the WS2812E from Lichuang Mall . as an indicator light.

This design includes the necessary peripheral circuits for CH551G operation, and leads out the ISP pins to facilitate debugging and developing firmware.

This design is compatible with CH551G, CH552G, CH554G and other SOP16 packaged microcontroller chips.

This design sets aside a TTL serial port, which can be used as a USB-to-serial port downloader.

After this device is connected to a computer, it simulates a serial port device and sends data through the serial port to set the color and brightness of the LED light. Realize effects such as breathing lights and flashing through code. For example, with code implementation: the color of the breathing light indicates the CPU temperature. Breathing rate indicates CPU usage.