Essentially, you use 1 egg for every 2 people who will be eating it, and 100g (about 1 cup) of flour per egg. You can use up to half semolina.
In a large bowl, make a well in the flour, crack in the eggs, and beat eggs with fork, slowly working in the flour from around the edges. When it forms a dough, knead a bit more flour in on the counter until it's not so sticky.
Pasta for 2
Set up your pasta roller and starting on the widest setting, roll your pasta through. Flour it, fold it, and repeat until it no longer gets sticky. It will start to feel a bit leathery. Then go to the next setting and roll it through and so on, until you're down to the next to last or last setting. For angel hair, you need to go to the thinnest setting, but everything else is fine on the next-to-last setting.
Cut it into the lengths you want your noodles and run it through the cutter or cut by hand. Toss with flour to prevent sticking. When you're ready to cook it, drop it into salted boiling water for just a few minutes.