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Why all solar panels are secretly LEDs (and all LEDs are secretly solar panels)

5 videos recommended on HN
YouTube
Cited on HN 3 times, 2022–2024, never outright recommended score 0
Years with an HN recommendation, 2007–2026

Cited as a neat demonstration that diodes work in both directions in semiconductor and LED discussions.

Steve Mould shows that LEDs and solar panels are both diodes made from semiconductors, so a solar panel can emit light and an LED can generate electricity. He demonstrates a small solar panel lighting up.

“Steve Mould had a video[1] about this a couple of years ago where he shows a small solar panel lighting up.” (HN, 2022)

3 citations · Explainers

3 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@hawski Nov 2024 Cites it
on HN thread Phased Array Microphone (2023)
Steve Mould of Youtube fame did this: Why all solar panels are secretly LEDs (and all LEDs are secretly solar panels) - [this video]
Steve Mould on solar panels being LEDs and vice versa.

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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