# Distance Sensor
## **Introduction**
The distance sensor detects the distance between objects and the sensor, with a detection range of 0~255 cm.
Using laser reflection principles, the sensor measures the round-trip time of laser signals to calculate the absolute distance between the sensor and the target. The sensor emits laser at a wavelength of 940 nm and completes distance measurements up to 2 meters in under 30 ms.
_**Note:**__ The VL6180X measures distance based on __**Time-of-Flight (ToF)**__ technology. Therefore, its measurement accuracy is affected by the target's surface reflectivity, material properties, and orientation._
1. _**Target Reflectivity:**__ Black or highly light-absorbing materials can significantly reduce the maximum measurable distance. _
2. _**Ambient Light:**__ Strong sunlight or infrared interference may affect measurement consistency. _
3. _**Angle of Incidence:**__ When the target surface is not perpendicular to the sensor (incidence angle > 10°), reduced reflected light intensity may introduce measurement errors. _
4. _**Temperature Drift:**__ Changes in the sensor's internal temperature may cause slight variations in the absolute distance measurement. _
5. _**Optical Cover and Window Material:**__ If an external lens or protective window is used, factory calibration and compensation are recommended to ensure optimal measurement accuracy._
## Structure
| No. | Name | Description |
| :---: | :---: | :---: |
| ① | Icon | Green imprint for module type identification |
| ② | Pinhole | Connects and secures building blocks via pinholes |
| ③ | RJ11 Port | Applicable to the crystal head connecting cable |
| ④ | Groove | Connects and secures building blocks via grooves |
## Specifications
| Item | Description |
| :---: | :---: |
| Name | B0100004 |
| Code | KIDZBricks Distance Sensor |
| Dimensions | 31.8x31.8x28 mm |
| Weight | 15 g |
| Material | ABS |
| Operating Voltage | 3.3 V |
| Operating Voltage | RJ11 Port |
| Communication | I2C |
| Detection Data | 0~255 |
## Usage Instructions
| Type | Description |
| :---: | --- |
| Application Modes | Logic control mode, programming control mode. |
| Connection Method | Establish a connection with the hub through the Crystal Head Connector. |
| Status Detection | Detects the distance between objects and the sensor to adjust the corresponding actuator or character accordingly. |