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Thank the Old-Timey Telegraph For Your Garage Door Opener

Monday January 21, 2019. 03:00 PM , from Wired: Cult of Mac
The electric relay makes all kinds of household devices possible, but they don't get much love. Until now!
https://www.wired.com/story/thank-the-old-timey-telegraph-for-your-garage-door-opener
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