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The origin of currency is the creation of a circulating medium of exchange based on a unit of account which quickly becomes a store of value. Currency evolved from two basic innovations, both of which had occurred by 2000 BC. Originally money was a form of receipting grain stored in temple granaries in Sumer in ancient Mesopotamia, then Ancient Egypt.
This first stage of currency counter , where metals were used to represent stored value, and symbols to represent commodities, formed the basis of trade in the Fertile Crescent for over 1500 years. However, the collapse of the Near Eastern trading system pointed to a flaw: in an era where there was no place that was safe to store value, the value of a circulating medium could only be as sound as the forces that defended that store. Trade could only reach as far as the credibility of that military. By the late Bronze Age, however, a series of international treaties had established safe passage for merchants around the Eastern Mediterranean, spreading from Minoan Crete and Mycenae in the northwest to Elam and Bahrain in the southeast. Although it is not known what functioned as a currency counting machine to facilitate these exchanges, it is thought that ox-hide shaped ingots of copper, produced in Cyprus may have functioned as a currency.
It is thought that the increase in piracy and raiding associated with the Bronze Age collapse, possibly produced by the Peoples of the Sea, brought this trading system to an end. It was only with the recovery of Phoenician trade in the ninth and tenth centuries BC that saw a return to prosperity, and the appearance of real coinage, possibly first in Anatolia with Croesus of Lydia and subsequently with the Greeks and Persians. In Africa many forms of value store have been used including beads, ingots, ivory, various forms of weapons, livestock, the manilla currency, ochre and other earth oxides, and so on. The manilla rings of West Africa were one of the currencies used from the 15th century onwards to buy and sell slaves. African currency is still notable for its variety, and in many places various forms of barter still apply.
Basic banknote counters only provide a total number of notes in the supply hopper. More advanced counters can identify different bill denominations to provide a total currency value of mixed banknotes. Some banknote counters can also detect counterfeit bills either magnetically and/or using blacklight. Blacklight (UV) based detectors exploit the fact that in many countries, real banknotes have fluorescent symbols on them that only show under a black light. Also, the paper used for printing money does not contain any of the brightening agents which make commercially available papers fluoresce under black light. Both features make counterfeit notes both easier to detect and more difficult to successfully produce.
A stack of bills are placed in a compartment of the currency counters china , and then one bill at the time is passed through the machine. By counting the number of times a bill is passed by a light (usually a laser), the machine can figure out how much money was placed in the compartment. source:news lgspeed-tech
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