[請益] 電表的導通檔原理
各位版大好
小弟現在想製作一個電路
裡面的功能是
假如兩點導通(即兩端阻值很小)
則led亮
這樣的功能很類似三用電表測短路的那個檔
所以想請問大家像這樣的功能應該如何實現
萬分感謝
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