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USB current detection based on LCSC SkyStar

Overview

This is a USB voltage and current measurement board based on the LCSC SkyStar development board.

Upon power-on, the digital tube displays voltage by default.
Pressing button KEY3 switches to displaying current.
Pressing it again switches back to voltage.

Pressing button KEY1
starts the fan. Pressing it again turns the fan off.

Pressing button KEY2 enters sleep mode.
Sleep mode: The fan is on, the digital tube and flashing LED3 are off. After two hours, the fan turns off (in Guangdong, it's autumn, daytime temperatures are around 33 degrees Celsius, and early morning temperatures are only around 20 degrees Celsius).
Pressing KEY2 again turns sleep mode off.

Interested users can build their own board and download the firmware in the attachment to experience it.

Demo video:
[Voltage and Current Measurement Board Based on LCSC SkyStar Development Board] This project has been open-sourced to the LCSC hardware platform. _Bilibili_

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2026-03-26 19:30:27

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