IR Line Sensor 5 ARRAY (DIGITAL) 248.98 (Inc. GST)
211.00 (+18% GST Extra)
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TCRT 5000 Module Line Sensor High Quality 95.58 (Inc. GST)
81.00 (+18% GST Extra)

SmartElex RLS-08 Analog & Digital Line Sensor Array – High Quality


  1. Operating voltage: 4.5V to 5.0 V
  2. Supply current: 150 mA
  3. Output format: 8 Analog and Digital voltages.
  4. Optimal sensing distance: 3 mm.
  5. Maximum recommended sensing distance: 6 mm
  6. Potentiometer to adjust the sensitivity of the individual sensors.
  7. Uses 8 sensors for best resolution
  8. Comes with easy to use digital outputs that can be connected directly to microcontrollers
SKU: RDNA-65.2

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446.04 (Inc. GST)
378.00 (+18% GST Extra)

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This SmartElex RLS-08 Analog & Digital Line Sensor Array has 8 IR LED/phototransistor pairs, making it a great detector for a line-following robot. Each sensor has its own digital and analog output also a potentiometer to adjust the sensitivity of the individual sensors.

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

Each phototransistor equips a pull-up resistor to form a voltage divider that produces an analog voltage output between 0 V and VIN (which is typically 5 V) 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 5 V operation are arranged in two stages; this allows a simple bypass of one stage to enable operation at 3.3 V. The LED current is approximately 20-25 mA, making the total board consumption just under 100 mA.

Datasheet available here.







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