7805 5 Volt regulator
These come in two basic types dependent on power requirement
7805(1 Amp) and 78L05 (Low power 100mA)
7805 TO outlines TO-220 and TO-92
7805 Regulator (TO-220 package shown)
Note the use of two electrolytic 10μF smoothing capacitors, need to be rated for 10 volts, I recommend 16volt.