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1. Tube🌞Time (tubetime@mastodon.social)'s status on Wednesday, 28-Aug-2024 01:55:57 JST Tube🌞Time

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   here is a closeup. the raw MFM data shows a square wave of 5MHz for most of it, but there is a short section (4ms long) of 1.8MHz. the one-shot acts as a primitive data separator and the MCU can then detect this index marker and reset the hall effect divider flip flop.