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2025 One Hertz Challenge: Blinking An LED With The Aid Of Radio Time

Summary by Hackaday
If you want to blink an LED once every second, you could use just about any old timer circuit to create a 1 Hz signal. Or, you could go the complicated route like [Anthony Vincz] and grab 1 Hz off a radio clock instead.  The build is an entry for the 2025 One Hertz Challenge, with [Anthony] pushing himself to whip up a simple entry on a single Sunday morning. He started by grabbing a NE567 tone decoder IC, which uses a phase-locked loop to trigg…
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Hackaday broke the news in on Thursday, August 14, 2025.
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