This article shows explains a simple implementation of 5 V voltage regulator IC, LM7805.

You can see the performance of my circuit in this video:

Step 1: Make the Circuit

I did not include any input or output capacitors specified in the LM7805 datasheets.

Step 2: Testing

The analogue multimeter is tuned to zero when disconnected. The 5 V voltage regulator is providing a voltage slightly above 5 V: 

Read this link for more information about heat sink selection:

https://www.instructables.com/Component-Heat-Dissipation