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 ...

This reader wants to know if there's a digital countdown timer for the computer that can replace his trusty cooking timer. Rick Maybury 06 June 2012 • 7:00am With the grandchildren arguing over the ...

NASA's launch clock is finally moving into the digital age. The new countdown timer sports a 1280 x 360 resolution screen (which NASA admits is far from being HD) and measures in at 26 feet wide and ...