emulation resistive touch screen - https://www.youtube.com/watch?v=JYI9l9yhL6E

emulation resistive touch screen v2 - https://www.youtube.com/watch?v=cjByUmV9f5U

java pincode sender + arduino receiver + touch screen multiplex interface - https://www.youtube.com/watch?v=IUqy0aOLqSg

бывают и такие, механические варианты

https://www.youtube.com/watch?v=k_n5W69OdKM