The Tower Pro SG90 is the go-to 9g micro servo for Arduino, robotics, RC and STEM builds — light, affordable and easy to drive straight from the Arduino Servo library. Choose the 180° positional version for precise angle control, or the 360° continuous rotation version for non-stop motion like drive wheels. Pick your version at checkout.
- Lightweight 9g micro servo, runs on 4.8–6V
- 180° positional or 360° continuous rotation (select variant)
- Standard 3-wire PWM — works with the Arduino Servo library
- Includes a set of servo horns + mounting screws
- ~1.6 kg/cm torque (180°) / ~110 RPM (360°)
- Hand-tested before dispatch from our Te Awamutu workshop
Which version do I need?
180° — Positional
Moves to and holds a commanded angle (0–180°). Best for steering, robot arms, claws and pan/tilt camera rigs — anything that needs to sit at a set position.
360° — Continuous rotation
Spins continuously — you control speed and direction (≈90 = stop), with no fixed angle. Best for drive wheels, rovers, conveyors and turntables.
Specifications
What's in the box
Plus a set of servo horn attachments and mounting screws. Buying a few? Quantity discounts kick in at 3, 5 and 10 — they apply automatically in your cart.
Great for
Wiring & code
- Brown = GND, Red = 5V, Orange = signal to a PWM pin (e.g. D9)
- Use the built-in Arduino Servo library — no extra drivers needed
- 180°: servo.write(angle) sets the position (0–180)
- 360°: servo.write(value) sets speed/direction — ~90 stops it
- Under load, power from a dedicated 5V supply with a common ground
Common questions
Can I use the SG90 with Arduino?
Yes — it works perfectly with Arduino using the built-in Servo library. Brown = GND, Red = 5V, Orange = signal to a PWM pin.
What's the difference between the 180° and 360° versions?
The 180° is a positional servo that moves to and holds a commanded angle (0–180°). The 360° is a continuous rotation servo — it spins continuously and you control speed and direction instead of a fixed angle (about 90 = stop). Pick the version that suits your project at checkout.
Can I power it straight from the Arduino 5V pin?
It's fine for light testing, but under load the SG90 can draw enough current to brown-out the board. For reliable use, power it from a dedicated 5V supply and share a common ground.
What's included?
One Tower Pro SG90 servo (180° or 360° as selected) plus a set of servo horn attachments and mounting screws.
Good to know: every servo is hand-tested before it leaves our Te Awamutu workshop — 180° units for smooth full-range sweeps, 360° units for clean forward/reverse and a tidy neutral stop. Stocked in NZ and dispatched fast — overseas prices, without the overseas wait.