I want to create a machine that is able to read the amount of euros or US dollars inserted into it. (either in coins or paper bills, there is no need for it to be able to give money back, so the money will only be put into it not out of it)
I did some research and found that there is a coin sensor that costs ~20usd and a paper bill sensor that costs 200usd.
For the paper bill sensor, I have no idea if it is compatible with the RaspPi and is extremely pricy for me.
(coin sensors price is ok but if there is a good alternative let me know, as well as useful info for my project!)
The sensors must be extremely accurate!
Has anyone worked on a similar product and would like to recommend something? Thanks in advance!