We're closed from 13th June until 16th June for end of Ramazan & Eid holidays. Orders placed during this period on website will be processed from 18th June.
Also, Kondapur & Asifnagar Retail Stores will be closed during this period. Thanks.
8 Sensor lines following array
Product Images shown are for illustrative purposes only and may differ from the actual Product. Due to differences in PCB manufacturers, colours, pin mappings, markings & packaging of products/PCBs may also differ from those shown above.

This sensor module has 8 IR LED/phototransistor pairs mounted on a 0.375" pitch, making it a great detector for a line-following robot. Pairs of leds are arranged in series to halve current consumption, and a MOSFET allows the LEDs to be turned off for additional sensing or power-savings options. Each sensor provides a separate digital I/O-measurable output.

Note: The QTR-8RC reflectance sensor array requires digital I/O lines to take readings. 

Functional Description:

The QTR-8RC reflectance sensor 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 (phototransistor) pairs evenly spaced at intervals of 0.375" (9.525 mm). Each phototransistor uses a capacitor discharge circuit that allows a digital I/O line on a microcontroller to take an analog reading of reflected IR by measuring the discharge time of the capacitor. Shorter capacitor discharge time 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. The schematic diagram of the module is shown below  

Specifications:

  • Dimensions: 2.95" x 0.5" x 0.125" (without header pins installed)
  • Operating voltage: 3.3-5.0 V
  • Supply current: 100 mA
  • Output format: digital I/O compatible
  • Optimal sensing distance: 0.125" (3 mm)
  • Maximum recommended sensing distance: 0.375" (9.5 mm)
  • Weight without header pins: 0.11 oz (3.09 g)
  • QTR-1RC output (yellow) when 1/8" above a black line and microcontroller timing of that output (blue).

 

Write a review

Note: HTML is not translated!
    Bad           Good

8 Sensor lines following array

Free Shipping on Order Sub-Total over Rs. 1999.
If your required quantity is more than what's shown below, please ping us to know the lead time and to pre-order.
  • Views: 1539
  • Product Code: 8 Sensor lines following array
  • SKU: PL-0-908
  • Availability: 5
  • Rs. 550.00
  • 5 or more Rs. 545.00
  • 10 or more Rs. 540.00
  • 20 or more Rs. 530.00
  • 50 or more Rs. 510.00

For bulk (& discounted) corporate/academic orders, please contact us for Estimate.

Discuss about this product here