DT-SenseLine Tracking SFH 4 Sensor

DT-SENSE LINE-TRACKING SFH 4 SENSOR is a sensor module that can be used to detect light colored lines with a dark background or dark colored lines with light background. This module consists of 4 pieces of LED and 4 pieces of NPN-Silizium-Fototransistor (SFH 300). The output of this sensor module is analog voltage ranging from ~ 0 VDC for light path and ~ 4.9 VDC for dark path. An application example of DT-SENSE LINE-TRACKING SFH 4 SENSOR includes line tracking robot navigation, or other applications that uses the light reflections to distinguish contrast between 2 surfaces.

Specification1. Requires a 5 VDC power supply.2. Consists of 4 LEDs and 4 pieces of Silizium

Fototransistor SFH 300.3. Optimal Distance sensors to objects/paths around 4-

10 mm. 4. Each sensor's output voltage ranges from 0 VDC up to

4.9 VDC.5. Distance between sensors is about 12.5 mm.6. Equipped with a pin to turn the LED on or off.7. Equipped with a variable resistor to calibrate each

sensor.8. Output can be connected to Analog to Digital

Converter (ADC) or set of comparators.

Layout

SENSOR PORT (J4) connector serves as the interface connector with DT-SENSE LINE-TRACKING SFH 4 SENSOR.

Pin Name Function

1 PGND Ground reference point

2 VCC Power supply input (5 VDC)

3 NC Not connected

4 LE LED Enable (High logic to turn on the LED and Low logic to turn off the LED)

5 PT1 1st Sensor's Output

6 PT2 2nd Sensor's Output

7 PT3 3rd Sensor's Output

8 PT4 4th Sensor's Output

SENSOR PORT (J4) was not given a header or any other connectors to give freedom to users during the assembly process.

Tes ting Procedure 1. Connect the 5 VDC power supply and its ground to

pin 2 and pin 1 of J4 connector.2. Connect the 5 VDC voltage to pin 4 of J4 connector

to activate/turn on the LED.3. If there is no problem with the module, then all 4 LEDs

will light up.4. Place the sensor module on top of a white paper/line

and measure the output voltage of each sensor (on pin 5 - 8 of J4 connector).

5. Set the variable resistor calibration for the 1st sensor so that the sensor output has a value of 0.1 – 0.2 VDC.

6. Set the variable resistor calibration for the other sensors so that the sensor output for each sensor also has a value of 0.1 – 0.2 VDC.

7. Place the sensor module on top of a black paper/line and measure the output voltage of each sensor (on pin 5 - 8 of J4 connector).

8. The output value for each sensor should be higher (about 3.2 – 3.4 VDC).

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