Thread: Xiaomi launches the InkPalm 5 mini e-reader for 599 yuan (~$91)
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Old 12-16-2024, 10:58 AM   #237
Quoth
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Cut top off a metal can transistor (TO18 or TO5, e.g. BC107). That works well.

A reverse biased LED does work as a very poor photo transistor.
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