SG90 9g Mini Micro Servo for RC for RC 250 450 Helicopter Airplane Car

Tiny and lightweight with high output power. Servo can rotate approximately 180 degrees

(90 in each direction), and works just like the standard kinds but smaller. You can use any

servo code, hardware or library to control these servos. Good for beginners who want to make

stuff move without building a motor controller with feedback & gear box, especially since it

will fit in small places. It comes with a 3 horns (arms) and hardware.

Specifications

• Weight: 9 g

• Dimension: 22.2 x 11.8 x 31 mm approx.

• Stall torque: 1.8 kgf·cm

• Operating speed: 0.1 s/60 degree

• Operating voltage: 4.8 V (~5V)

• Dead band width: 10 µs

• Temperature range: 0 ºC – 55 ºC 

Hack a TowerPro Micro Servo to Spin 360 / Continuous Rotation

http://www.instructables.com/id/How-to-Make-a-TowerPro-Micro-Servo-Spin-360/