用回收的真空荧光显示屏制作时钟
作者从旧计算器中拆解出真空荧光显示屏（VFD），并以此制作了一台复古风格时钟。文章详细介绍了VFD作为三极管的原理、引脚探测方法、驱动电路设计（MOSFET升压至12V）、以及基于微控制器和32.768kHz晶振的精准计时方案，最终将成品装入手工打造的木质外壳中。
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