DISCOVERED IN HACKER NEWS
Building Electret Mic Preamp Open sourced
Building Electret Mic Preamp Open sourced：从 Hacker News 推荐讨论中自动发现的产品。
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10讨论来源
2026-06-28最近提及
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自动整理的讨论摘录，保留原始英文。阅读原文了解完整语境。
I usually settle on this design: https://hackaday.io/project/184643-schrdingers-trigger https://hackaday.io/project/184643-schrdingers-trigger The zener design works well,阅读完整讨论
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