Comprising a microprocessor, an LCD, a 32.768-kHz crystal, and little else, the basic countdown-timer circuit in Figure 1 operates from a commonly available CR2032 lithium-coin-cell battery. Based on ...

Using the Alexa Timer is so easy, it’s the first skill many Echo smart speaker owners try out. Just say, “Alexa, set a timer for 12 minutes,” to start a countdown. When we bought our first Echo Dot ...