[obsidian] vault backup: 2025-11-26 23:07:22[
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@@ -29,6 +29,8 @@ date: 2025-11-08 21:56
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回路としては、キャパシタンスマルチプライヤーを挟んで、自作平板コンデンサを使いセンサー代わりにするようなイメージ。
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[Again some OPAMP analog magic:In a previous post, we saw that the transistor voltage gain multiplies the base-collector capacitance, so a larger capacitance is seen at the base of the… \| Roel Arits \| 53件のコメント](https://www.linkedin.com/posts/roel-arits-a233688_again-some-opamp-analog-magic-in-a-previous-activity-7351217948440600576-a1FW)
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ゲインを前はスレッショルド決めて1/0でLED制御していたのを、エンベロープゲイン設定してLEDの輝度を5Vから音量に応じて引き算する(ゲインが大きければこれまで通り)ようなイメージにした。
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![[img/スクリーンショット 2025-11-19 17.24.17.png]]
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