You are at home, browsing the web, or watching a movie on Netflix and the only element disrupting your peace and comfort is a very important appointment, due in 4 hours. Knowing how easily you can ...

Amazon dropped the price for the Echo Wall Clock, the extremely helpful visible countdown display for the Alexa timer Amazon Alexa’s voice-controlled timer is the most useful out-of-the-box feature of ...

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 ...