Voltage Regulator
I'll teach you to make a voltage regulator 12v to 5v.
Materials
The Materials are:
-1 5V Voltage Regulator 7805
-1 Switch
-1 Female Jack
-1 terminal block
-2 Capacitor 100uF
-1 Diode 1N4007
-1 9V Battery
-stranded wire
-1 Protoboard