I would like to create a project to implement an asynchronous counter (I am just learning about sequential circuits), in which 2 8-segment displays will receive input from some sensor and will indicate how many times this sensor has been activated (say, a distance sensor). I am just starting out, so I don't really know what sort of components I should use and how exactly I can begin this project. I would appreciate it if someone could provide me with a helpful link or a component list that I should buy (I think I might need an amp-op?) and to give a description on how I should proceed with this project. Any help deeply appreciated.
EDIT: Here's specifically what I need help with, perhaps I was too vague: a) How to use the 8-segment displays by feeding information from an asynchronous counter. b) How to make a signal return a logical '1' once it crosses a certain voltage threshold from a sensor c) How do I interface the FSM counter I designed with the IC's that I should use from the 8-segment display?