Yahboom SG90 9g Servo Platform Kit for Smart Car (Servo Kit), 180° Rotation, HC-SR04 Optional Mount
Yahboom SG90 9g Servo Platform Kit for Smart Car (Servo Kit), 180° Rotation, HC-SR04 Optional Mount
Yahboom
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Overview
Product type: Servo kit. This Yahboom SG90 servo with platform for smart car combines a 9g micro servo and a mounting platform for building pan/tilt-style ultrasonic scanning on a smart car. It is designed for distance measurement and ultrasonic obstacle avoidance experiments with 180° angle range rotation.
Key Features
- 180° angle range rotation
- PWM control reference (cycle: 20ms): 0.5ms = 0°, 1ms = 45°, 1.5ms = 90°, 2ms = 135°, 2.5ms = 180°
- 180° ultrasonic scanning avoiding: the ultrasonic sensor combined with a steering gear pan tilt that can rotate 180° can realize dynamic scanning and ranging in a large area ahead, judge the open position of the relative obstacle, and realize intelligent obstacle avoidance.
For product selection and technical support, contact https://rcdrone.top/ or email support@rcdrone.top.
Specifications
Servo platform parameters
| Fixing plate size | 32*32mm |
| Fixed hole spacing of copper column | 10mm |
| Height (excluding ultrasonic module and copper column) | 35mm |
| Weight (excluding ultrasonic module and copper column) | 21g |
| Copper stud thread | M3 |
| Copper column model | M3*40mm double-pass |
| Screw model | M3*8mm steering gear package screw |
Size of 9G servo
Dimensions shown (units not specified in the drawing): 12.00, 32.50, 27.80, 8.56, 23.0, 16.30, 23.20, 27.30; hole diameter: Φ2.20.
Parameters of 9G servo
| Working voltage | 4.8-6.0V DC |
| No-load current | 90mA (4.8V) |
| No-load speed | 0.13sec/60° (4.8V) |
| Locked rotor torque | 1.3kgf.cm (4.8V) |
| Locked rotor current | 750mA (4.8V) |
| Pulse width range | 500-2500us corresponding 0~180° |
| Angle accuracy | 180°±3° |
| Dead band width | 8us |
| Rocker arm type | 20T/Φ4.9mm |
| Line length | 250mm+5mm |
| Gear material | Plastic tooth |
| Output shaft material | Plastic shaft |
| Shell material | ABS |
| Control mode | PWM pulse width control |
| Working life | 200,000 Cycles (Min) |
| Weight | 9±0.5g |
Ultrasonic parameters (HC-SR04)
Module size shown (dimensions units not specified in the diagram): 45, 19, 20, 1.5.
| Model | HC-SR04 |
| Working voltage | 5V |
| Operating current | 15mA |
| Working frequency | 40KHz |
| Static operating current | <2mA |
| Sensing angle | ≤15° |
| Range | 2CM-4CM (Peak value) |
| Detection range | 2-400cm |
| High-precision | Up to 0.3cm |
| Blind area | 2cm |
| Pin sequence | VCC, Trig (control terminal), Echo (receiving terminal), GND |
| Input trigger signal | 10us TTL pulse |
| Input echo signal | Output TTL level signal, proportional to range |
| Level output | TTL level |
Interface Description
- Servo control port: insert servo line
- Servo input port: Servo VCC, Servo GND
- Controller connections (labels shown): GND, Ultrasonic Echo, Ultrasonic Trlg, VCC
- Ultrasonic interface: GND, Echo, Trlg, VCC
- Note shown: The red line is the connection between ultrasonic wave and servo platform. The blue line is the connection between the servo platform and the development board/controller.
What's Included
- Servo platform bracket *2
- M3*40mm double pass copper column *2
- 9G servo
- Screw
- Rudder arm + fixed wing
- Ultrasonic module (optional)
Applications
- Smart car distance measurement experiments
- Ultrasonic scanning obstacle avoidance (180° rotation)
Manuals
Tutorial link: http://www.yahboom.net/study/SG90-Servo
Details
Combine a 9g micro servo with an ultrasonic sensor mount to build a compact 180° scanning head for smart cars.
The pan/tilt bracket lets the sensor sweep left to right for wider distance measurement coverage.
PWM timing reference makes it easy to command repeatable angles across the full 0–180° range.
Dynamic ultrasonic scanning helps a robot car identify open paths and steer around obstacles.
Clear pin labeling simplifies connecting servo power/control and the HC‑SR04 Trig/Echo lines to a controller.
Mounting dimensions and M3 hardware details help confirm fit with your chassis and standoffs before assembly.
Compact 9g servo dimensions are provided for tight robot builds and pan/tilt mechanisms.
HC‑SR04 module dimensions and pin order are included for clean integration into the scanning bracket.
Check the parts list to confirm you have the bracket plates, standoffs, screws, and servo horn set needed to assemble the mount.
Common use case: mounting on a smart car to give the ultrasonic sensor a sweeping field of view.
A simple build sequence walks from servo mounting to installing the ultrasonic module and fixing the assembly onto a car.
Reference materials are provided to help you get started with servo control and ultrasonic ranging.
Included code resources support building ultrasonic distance measurement routines on compatible controllers.
The assembled mount is available as a servo platform, with an optional HC‑SR04 ultrasonic module for scanning builds.
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