SmartElex RLS-06 Analog & Digital Line Sensor Array

This SmartElex RLS-06 Analog & DigitalLine SensorArray has 6 IR LED/phototransistor pairs, making it a great detector for a line-following robot.Each sensor has its own digital and analog output.potentiometerto adjust the sensitivity of the individualsensors.

The TCRT5000 reflectance sensors array is intended as aline sensor, but it can be used as a general-purposeproximity or reflectance sensor. The module is a convenient carrier for eight IR emitter and receiver (phototransistor) pairs evenly spaced at intervals.

Eachphototransistoris connected to a pull-up resistor to form a voltage divider that produces an analog voltage output between 0V and VIN (which is typically 5V) as a function of the reflected IR. The lower output voltage is an indication of greater reflection.

The outputs are all independent, but the LEDs are arranged in pairs to halve current consumption. The LEDs are controlled by a MOSFET with a gate normally pulled high, allowing the LEDs to be turned off by setting the MOSFET gate to a low voltage. Turning the LEDs off might be advantageous for limiting power consumption when the sensors are not in use or for varying the effective brightness of the LEDs through PWM control.

The LED current-limiting resistors for 5V operation are arranged in two stages; this allows a simple bypass of one stage to enable operation at 3.3V. The LED current is approximately 20-25mA, making the total board consumption just under 100?mA.The schematic diagram of the module is shown above.

Features :

1. Potentiometer to adjust the sensitivity of the individual sensors.
2. The module is a convenient carrier for six IR emitter and receiver pairs evenly paced.
3. Uses 6 sensors for best resolution
4. Great useful in building fast line following and grid navigating robots
5. Comes with easy to use digital outputs that can be connected directly to microcontrollers
6. The array has mounting holes of 3mm diameter for easy mounting

Frequently Asked Questions

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