Choose form a set of 10 AMS1117 3.3V or AMS1117 5.0V or AMS1117ADJ (adjustable output voltage) surface mounted voltage regulator chips and/or the capacitors they need. 

Or get one of the the ready-to-use 3.3V/5V voltage regulator boards.

Packages of 10 AMS1117 3.3V or AMS1117 5.0V or AMS1117ADJ SMT components

The AMS1117 3.3V or AMS1117 5.0V or AMS1117ADJ SMT/SMD chips come in packages of 10, the 2.5V, 3.3V or 5V voltage regulator boards come in packages of 1.