Ripley's Believe It or Not by Ripley’s Believe It or Not! for June 02, 2012
June 01, 2012
June 03, 2012
Transcript:
The dinosaur with the longest name, Micropachycephalosaurus, is also one of the smallest; it was only about the size of a house cat! Quartz clocks keep time using a tiny quartz crystal that vibrates 32,768 times a second! The Sentinelese- a secluded tribe of about 100 people living on North Sentinel Island in the Indian Ocean- resist all outside contact- even killing fishermen who land on the island!
More From Ripley's Believe It or Not
Frequency counters are very adept at that sort of thing.Now, divide 32,768 by 2: 16,384 divide by 2 again: 8,192 4,096 2,048 1024 512 256 128 64 32 16 8 4 2 1It would be impractical to get a crystal to vibrate at the 1 second time base (and large) So, the crystal vibrates at 32,768 and is divided by 2 with microcircuits to get the 1 time-base.(In 1976 I was at the Motorola plant that was mass producing these crystals)