### Project 19 Line Tracking Sensor

![](media/wps15.png)

**1.Introduction**
This Line Tracking Sensor can detect white lines in black and black lines in white. The single line-tracking signal provides a stable output signal TTL for a more accurate and more stable line. Multi-channel option can be easily achieved by installing required line-tracking robot sensors.

**2.Specification**

- Power supply: +5V
- Operating current: <10mA
- Operating temperature range: 0°C ~ + 50°C
- Output interface: 3-wire interface (1 - signal, 2 - power, 3 - power supply negative)
- Output Level: TTL level
- Size: 41.7*10.7mm
- Weight: 3g

**3.Connection Diagram**

![](media/wps16-1764384136388-3.jpg)

**4.Sample Code**

```c
void setup()
{
   Serial.begin(9600);
}

void loop()
{
   Serial.println(digitalRead(3)); // print the data from the sensor
   delay(500);
}
```