Go with Osgeld's idea, because not only can that way calculate fall time, but it can calculate the speed as well. The only downside is that you need to keep the PP ball within a decent range of the sensors, otherwise the data will be off.
Go with Osgeld's idea, because not only can that way calculate fall time, but it can calculate the speed as well. The only downside is that you need to keep the PP ball within a decent range of the sensors, otherwise the data will be off.