The heart-shaped running water lamp designed based on the STC series microcontroller uses the package in Lichuang EDA, so the 3D effect looks like the electrolytic capacitors and ceramic capacitors are highlighted, but the 3D effect will not appear during actual welding. In this case, leave the electrolytic capacitor pin longer and lay it flat on the PCB. The power supply can be charged using the USB-B interface, which is the ordinary Android interface that provides power to the PCB board. In addition, pin headers are reserved on the side, which are the power and download ports.
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