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The simple, clever sensor behind automatic windshield wipers

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Further reading 1

The machine says it passed. Who can check? →Follow a ballot into a voting machine, then follow a read request across a motherboard. At each step ask what was examined, who delivered the answer and whether someone else can inspect the same evidence.This video helps answer · Should a toaster sense itself or the bread?

Caption notes

A rain sensor shines light from inside the windshield. Water at the exterior changes the reflection condition, altering the signal returned to the detector. Wiper control uses that optical difference as a proxy for surface wetness.

Archived captions (transcription method unspecified) ↗
Original passages · 2
it leverages the effect of total internal reflection.
The simple, clever sensor behind automatic windshield wipers · ▶ 3:29–3:34
Wet glass will allow some of the light produced by the LEDs to actually escape
The simple, clever sensor behind automatic windshield wipers · ▶ 5:50–5:58

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