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Sound Insulation Device—Brutal Version – 3D printable model from MakerWorld MakerWorld
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Sound Insulation Device—Brutal Version

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本项目为2024年全国大学生电子设计竞赛,G题参赛作品的开源版本,较参赛版本增加了功率以达到最佳的屏蔽效果。超声能量较大,使用请注意安全PCB原理图见 https://oshwhub.com/an_ye/recording-shield-2024-electric-t 本人为此系列开源项目作者超声波驱动主要由两套方案实现(板上预留3套方案,boost+变压器,H桥+变压器,功放),功放性能太烂没用上。boost+变压器,直接用PWM栅极驱动MOS管,实现20Khz左右的升压,实测使用超声波驱鸟器喇叭,在1m处声压可达到-13db,非常生猛,缺陷是容易产生<20khz的可听见音频杂波。在封箱前实现了扫频,在18.9k-22.5k之间来回扫频,1m处声压峰值可达-11db【要求3】中的功率调整,通过之间在FB上切换电阻实现,面向结果算电阻,轻松秒杀软件基于esp-idf,水了个lvgl的控制界面外壳已上传makerworld
Category
Music
Source
MakerWorld
Published
Updated
What you need to print this: Beginner Low confidence
Single piece
Supports 1/3
Assembly 0/3
Settings 1/3
Bed size 0/3
Post-process 0/3
Printer
FDM / FFF
File format
STL
Material
Polycarbonate
Software
Cura, PrusaSlicer, or similar
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