Your First Circuit

Turn on an LED


Electric Circuits

Electric Circuits are the pathways used by electrons to power the technology that surrounds us. An electric circuit is a closed loop of conducting material, usually copper, along which electrons can travel. 

Hardware setup

In this project, you will be powering an LED using a resistor. Place the Breadboard Guide Card over the BreadBro, and align it using the labels.

Insert a resistor as indicated. You can use any of the three resistor values - 100, 1,000, or 10,000 ohms.

Insert an LED. be sure that the longer leg of the LED shares the same row of holes as a pin from the resistor.

Using jumper wires, connect the components to the 5V (+) and GND (-) rails of your BreadBro.

Using jumper wires, connect the 5V and GND rails to the 5V and GND pins on BreadBro.


When you turn on the power switch, you'll see the LED turn on as current flows from the 5V pin of BreadBro, through the resistor, then through the LED and back to GND.


Going Further

Try changing the value of your resistor. What happens to the brightness of the LED?

What happens if you reverse the direction of LED insertion?