+5 Volt regulator TO-220

This is ideal for any circuit that integrates 5 volts components (like the Arduino and some modules) to items that operate on higher voltages. It ensures that the 5V supply is constant and prevents damage to chips that cannot handle more than 5V, which is especially useful when integrating such components into a 12V circuit.

The three pins are input, output and ground. See images for pinout.  
Max input voltage: 37V, although this is not recommended. 
Min input voltage: 7V
Stable output Current: 150mA