QTR-8RC Line Sensor (RC Time Digital)

Product Code: JS15184
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9.95 USD
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  • 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.
     
    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). To use a sensor, you must first charge the output node by applying a voltage to its OUT pin. You can then read the reflectance by withdrawing the externally supplied voltage and timing how long it takes the output voltage to decay due to the integrated phototransistor. Shorter decay time is an indication of greater reflection. 
     
    This measurement approach has several advantages, especially when coupled with the ability of the QTR-8RC module to turn off LED power: No analog-to-digital converter (ADC) is required Improved sensitivity over voltage-divider analog output Parallel reading of multiple sensors is possible with most microcontrollers Parallel reading allows optimized use of LED power enable option 
     
    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. 
     
    This sensor was designed to be used with the board parallel to the surface being sensed.
     
    We use them with Arduino Uno at PID line follower robot kit.

  • All products shipped with sealed in box. All products packaged carefully. Before shipment, we test all electronics and control the mechanics of all products. So you will never be disappointed when you open our JSumo shipment box.

    We have 2 Shipment Options:

    • Registered Air Mail ( Fixed Price 9,95 USD, Free On Orders Over 199 USD)
      DHL Worldwide Express Shipment (Based on weight)

    TIME TABLE FOR INTERNATIONAL REGISTERED AIR MAIL

    Below, these countries are the only examples. If your country is not in the list, don't be afraid. We are shipping to all over the world including your country too:)

    *Colombia, Paraguay, Peru shipments are sent over Brazil Postal Service. ( Turkey >> Brasil >> Colombia, Paraguay or Peru) Because of that delays can happen. We are sending shipment code.

    What is your return policy?

    You may return a product for refund or exchange (if due to our error) within 30 days of the order shipment date. (The order shipment date and order notification are provided to you by email). All returns must be accompanied with a Return Merchandise Authorisation number (order number #).

    If we shipped you the wrong product, or it arrived defective or damaged

    No problem. Just contact us within 30 days of the item's original shipping date to arrange for the return of your purchase. Send us photo of wrong product. And we will send a replacement or refund you for your purchase, provided the returned item(s) are received back in their original packaging, along with all accessories, warranty cards, manuals, software, etc., where applicable.

  • All products shipped with sealed in box and packaged carefully. Before shipment, we test all electronics and control the mechanics of all products. So you will never be disappointed when you open our JSumo shipment box.

    We have 2 Shipment Options:

    • Registered Air Mail ( Fixed Price 9,95 USD, Free On Orders Over 199 USD)
      DHL Worldwide Express Shipment (Based on weight)

    TIME TABLE FOR INTERNATIONAL REGISTERED AIR MAIL

    Below, these countries are the only examples. If your country is not in the list, don't be afraid. We are shipping to all over the world including your country too:)

    *Colombia, Paraguay, Peru shipments are sent over Brazil Postal Service. ( Turkey >> Brasil >> Colombia, Paraguay or Peru) Because of that delays can happen. We are sending shipment code.

    What is your return policy?

    You may return a product for refund or exchange (if due to our error) within 30 days of the order shipment date. (The order shipment date and order notification are provided to you by email). All returns must be accompanied with a Return Merchandise Authorisation number (order number #).

    If we shipped you the wrong product, or it arrived defective or damaged

    No problem. Just contact us within 30 days of the item's original shipping date to arrange for the return of your purchase. Send us photo of wrong product. And we will send a replacement or refund you for your purchase, provided the returned item(s) are received back in their original packaging, along with all accessories, warranty cards, manuals, software, etc., where applicable.

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