Note to Coin Exchanger Using PLC

Abstract

Now days, coins are required at lot of places and we have to suffer a lot for the change in various public places in daily life. Coins are used more instead of note in various places like bus station, railway station, malls, parks, even in rural areas where nowadays also coin telephone system is used. For such applications coins are used extremely, so we thought to develop an exchanger machine which will give us coins instead of notes. As there are lots of techniques to detect the Indian currency note, these are texture based, pattern based, checking by the watermarking, checking the micro lettering, color based recognition technique. The most preferable technique along all these is color based recognition. It is constructed by counting the number of pixels of each color. Color sensor is used which senses the RGB (Red, Green, Blue) colors and the result is given to the controller which will manipulate the coin container through relays and motors, the user simply press the keypad for which type of change he wants whether one rupee coins or five rupee or mixed and hence in the output we get coins as user requirement.