Servo Motor and Controller Guide
Learn about servo motors and servo motor controllers in this guide, including: how servo motors work, how to choose a servo motor, types of servo motors, and more.
Products for USB Sensing and Control
The MG90 is a nice small RC servo ideal for projects where size and weight are important.
RC servos are hobbyist remote control servos typically used in radio-controlled models, where they provide actuation for various mechanical systems such as the steering of a car, the flaps on a plane, or the rudder of a boat. These servos are not industrial grade and are not recommended for continuous heavy use.
The MG90 comes with 3 servo rudder pieces and 1 set of screws.
| Motor Properties | |
|---|---|
| Motor Type | Limited Rotation Servo |
| Range of Rotation | 175° |
| Rated Speed | 545°/s |
| Rated Torque | 2 kg·cm |
| Physical Properties | |
| Gear Train Material | Metal |
| Bearing Type | Dual Ball Bearing |
| Motor Length | 29 mm |
| Motor Width | 23 mm |
| Motor Depth | 12.2 mm |
| Wire Length | 250 mm |
| Weight | 14 g |
| Electrical Properties | |
| Rated Voltage | 5 V DC |
| Rated Current (on 1061 controller) | 90 mA |
| Rated Current (on 1066 controller) | 100 mA |
| Stall Current (on 1061 controller) | 480 mA |
| Stall Current (on 1066 controller) | 430 mA |
| Customs Information | |
| Canadian HS Export Code | 8501.10.00 |
| American HTS Import Code | 8501.10.40.60 |
| Country of Origin | CN (China) |
This servo motor needs to be connected to a servo controller board. If you're looking for higher torque, you should select a servo controller with an external power jack so it doesn't have to rely solely on USB power, which is limited. You can plug this servo directly to any of the boards in the list below by matching the color of the wire with the label on the board. Note that some servos have a white data wire and others have a yellow one- in both cases this wire corresponds to the "W" pin on the servo controllers.
| Product | Motor Properties | ||||
|---|---|---|---|---|---|
| Part Number | Price | Motor Type | Range of Rotation | Rated Torque | Rated Speed |
 Hitec Continuous Rotation Servo
|
$18.75 | Continuous Rotation Servo | — | 2.8 kg·cm | 44 RPM |
 Hitec Mega Sail Servo
|
$52.00 | Limited Rotation Servo | 180° | 19.8 kg·cm | 125°/s |
 Hitec Super Torque Servo
|
$40.50 | Limited Rotation Servo | 180° | 7.7 kg·cm | 300°/s |
 Hitec Winch Servo
|
$57.75 | Limited Rotation Servo | Approx. 2700° | 11 kg·cm | 225°/s |
 SpringRC Standard Servo
|
$8.00 | Limited Rotation Servo | 180° | 3.5 kg·cm | 400°/s |
 SpringRC Small Servo
|
$10.00 | Limited Rotation Servo | 180° | 2.4 kg·cm | 375°/s |
 SpringRC High Torque Continuous Rotation Servo
|
$18.00 | Continuous Rotation Servo | — | 12.2 kg·cm | 50 RPM |
