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 ...

Rarely do I go to bed without something playing on my iPhone, usually a YouTube video. The problem is, I need to make sure the video is long enough for me to fall asleep to, but not so long it wakes ...

We may earn commission from links on this page, but we only recommend products we love. Promise. Ahead, check out the best sleep sound machines your $$$ can buy, including travel-friendly models, ...

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.

Sometimes you can see a trend coming a mile away and, if there ever was one coming for the technology community, this is surely it. Google's Android clock app has long allowed users to add a custom ...