Sz1KmdZ

The colorful silk screen is still there today, but the lover from back then is nowhere to be seen.

 
Overview

By inserting the stc 89c51 microcontroller through welding, and connecting to the editor, functions such as countdown, password input, countdown voice broadcast, pulse emission, etc. can be realized.
At the same time, as a gift to my girlfriend, I posted a photo of me and him. Version 2.0 was changed to SMD components, which is more realistic.
It’s a pity that it was gone before my girlfriend had time to receive it //TwT
参考设计图片
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