Arduino servo wiring
This wiring diagram connects an SG90 servo to an Arduino Uno. The red and black wires supply power and establish a shared ground, while the signal wire carries the control pulses from D9. It is a concise starting layout for a position-control project. In a larger project, confirm that the chosen power source can provide the servo current and keep the Arduino and servo grounds connected. 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
An Arduino controls the position of a small hobby servo.
Key decisions
- Power: The servo positive and ground wires use the rails.
- Signal: The PWM control line is routed to D9.
- Common ground: The controller and servo share ground.
When to reuse this
Use for a low-power servo prototype; check the power supply for the servo load in a finished build.
Frequently asked questions
Which pin controls the servo?
Why is common ground important?
Can a servo use more current than the Arduino?
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