Distance Sensor

Introdution

The distance sensor features one infrared emitting diode and one infrared receiving diode. The infrared emitting diode sends out infrared rays, and when these rays hit an object in front, some of the infrared light is reflected back. The infrared receiving diode detects the amount of reflected infrared light to determine the distance to the object and the brightness of the object’s color. This sensor can be used to detect the distance to obstacles, and when combined with a black-and-white distinction setup, it can achieve line-following functionality. The detection range of the distance sensor is 0 to 120 mm (under indoor lighting conditions without direct sunlight).

Structure

No.	Name	Description
①	Phototransistor	Converts optical signals into electrical signals, enabling signal detection and amplification.
②	Infrared Emitter	Converts electrical signals into infrared light signals, transmitting them to the receiver.
③	Crystal Connector	The anti-back-off design is used to connect different components such as sensors, motors, and master actuators.

Note: The distance sensor should be used under indoor light sources, avoiding sunlight as it may affect the detection range.

Detection Range in Programming :

Sensor
Detection Range	Distance ≤ 20 mm	20 mm < Distance ≤ 40 mm	Distance > 40 mm

*Note: Slight errors (within 10 mm) between different distance sensors are normal and do not affect usage.

Specifications

Item	Description
Name	Distance Sensor
Code	B0130002
Dimensions	31×16×11 mm
Weight	9 g
Material	ABS
Communication	Serial Communication
Detection Mode	Contrast Detection (detection distance) / Color Detection (black and white color)
Detection Range	0 mm - 120 mm
Compatibility	LEGO

Usage Instructions

Mode	Description
Logic Control Mode	A single distance sensor can control motor rotation. Two distance sensors can be used for line-following mode.
Programming Control	Detects far/medium/close distances to control characters or motor movement. Detects black-and-white colors to control characters or motor movement.

For detailed instructions, please refer to the function description. Click on it to learn more.