Here this circuit is based on the principle of audio amplification using operational amplifier and pulse width modulation using 555 Timer. In this article we are describing the principle, design and ...

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Getting a good night’s sleep is hard. A third of all American adults report getting less than the daily recommended amount of sleep nearly every night. Too little noise, and the mind starts to race.

A few weeks before WWDC, Apple previewed a few new accessibility features that will be coming later this year. One of those features was background sounds, which Apple plans to ship in iOS 15.