so im trying to make a device to verify experimental setup. for doing that im in need of controlling an air pump (12v dc) in a specific way to give varying output pressure (from no air flow to max airflow), after taking input from a speedometer of car. For this i would like to know how to take input from a speedometer or how to simulte a spedometer input in arduino, and how to control a dc pump to get varying output. if i can get these two , i can combine these two to make my project. suggest solutions,please help . thank you.
pump something like this:- Sevylor 12V 15 PSI High Pressure Air Pump review - YouTube