Digital counters with mechanical components are known as mechanical counters. Mechanical devices were used to count events long before electronics became commonplace. They're usually made out of a series of discs set on an axle and marked with the numbers 0 through 9 on their edges. Each occurrence causes the rightmost disc to travel one step forward. Each disc, except the leftmost, has a protrusion that pushes the following disc to the left one increment after one revolution. These counters were employed as odometers in bicycles and automobiles, as well as in tape recorders, gasoline dispensers, and to monitor production operations. The Veeder-Root firm was one of the main manufacturers, and their name was frequently used for this sort of counter. More Information... URL : https://www.caddstock.com/