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This article originally appeared on Engadget at https://www.engadget.com/ai/metas-ai-display-glasses-reportedly-share-intimate-videos-with-human-moderators-135939855.html?src=rss
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Change watching: wait_for_change waits for any transition regardless of value, handy for logging or reacting to state churn.，详情可参考谷歌浏览器下载
One of the pins is programmed to produce a constant 1000 KHz square wave using PIO. The main program then turns the PIO on and off at the intended frequency. e.g. to emit an A4 pitch (440 Hz), it turns the 1000 KHz square wave on and off 440 times a second. To the radio receiver, this means a 440 Hz square wave audio. Using this technique, it emits the well-known Shave and A Haircut melody on a loop.