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Why it's not possible to synchronize turn signals (but also absolutely is)

Technology Connections1 HN recommenders · 2021–2024
3.3M views · explainer · evergreen · Uploaded 2021-08-20

Technology Connections explains why car turn signals appear to drift out of sync at stoplights and how thermal and other flasher designs work. It also covers how synchronization could be achieved.

Referenced as a typical example of the channel's hacker-eye view of everyday technology, and for its flasher explanation.

Cars, EVs & motorcyclesElectronics & circuit designMechanical & precision engineering

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3 comments from Hacker News

@beeboop2021 · in “Toyota 'reviewing' key fob remote start subscription plan after blowback”

please please don't: [VIDEO] I refuse to drive at night anymore. Headlights are way too bright and a big reason is people putting poorly made and poorly aimed aftermarket headlights on.

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@bcjordan2022 · in “Interest in heat pumps has increased dramatically in recent years”

Came here to post this :D The TC channel is definitely a hacker's eye view in to all the technologies that we take for granted every day. Tons of fascinating tech history covered, too. Other fun ones: - a defense of the simple drip coffee maker [LINK] - why do the turn signals not sync up when you're at a stop light? [VIDEO] - how humidifiers work and ehy the simple swamp cooler style are pretty ideal [LINK] - why dishwasher detergent packs are stupid (use powder/liquid) and why you should use the pre-wash slot and not bother pre rinsing your plates [LINK] - why do light switches click? [LINK]

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@Dwedit2024 · in “Apple II graphics: More than you wanted to know”

There's a video by Technology Connections all about turn signals: [VIDEO] Demonstrates thermal-based flashers as well as capacitor-based flashers. They are clicking because metal is moving and hitting metal.

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