Setting up a breadboard
For illustration purposes, the left side of the diagram below shows the inner connections of the breadboard. These do not actually appear on the breadboard.
Standard breadboard wiring
The diagram below shows the wiring you will use in almost every electronics project that requires a breadboard. This wiring diagram assumes you have a regulated power supply, such as that available from the 5V and ground pins on the Arduino Uno, or from a voltage regulator circuit such as those often created using the 7805 voltage regulator IC.