This is a 5v linear voltage regulator circuit.Input voltage should not be more then 35V.
Step 1: Test It on the Breadboard
Parts List :
2) 100 nF (ceramic capasitor)
3) 10 uF (electrolite capasitor)
4)100 uF (electrolite capasitor)
Step 2: Connecting the Parts
Now put your LM7805 on your breadboard pin 1 is input voltage pin 2 ground pin 3 is output voltage
positive part of the 10uF capasitor should be connected with pin3 and a 100nF capasitor will connected with this in parallel. Then the positive part of the 100uF capasitor should be connected with pin1.Input voltage should not be more than 25-30V and input voltage should be at least 7V. The Capacitors are for secure circuit you can ignore it if you want. The circuit is done.