Arduino blink LED wiring
This breadboard drawing shows the standard Arduino blink circuit. The D13 output feeds a red LED through a 220 ohm current-limiting resistor, and the LED returns to the ground rail. The physical view makes the hole-to-hole connections visible, which is helpful for first-time breadboard assembly. The sketch should use the same pin named in the diagram. Before using the layout in a build or document, compare every label with the source requirements and update the drawing when parts, conditions, or materials change. The example is deliberately small so the essential relationships remain readable, easy to review with collaborators, and ready to extend with the details required for the actual project.
Open it in the AI editor with a prompt pre-filled — keep what works, change what doesn't.
Scenario
A beginner is assembling an Arduino output test.
Key decisions
- Output: D13 drives the LED.
- Protection: A 220 ohm resistor limits current.
- Return path: The LED connects to ground.
When to reuse this
Use for the first Arduino blink exercise.
Frequently asked questions
Why use a 220 ohm resistor?
Which pin drives the LED?
Where does the LED return?
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