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Adafruit Reflective IR Sensor with 470K and 10K Resistors

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Price:
$3.00 (inc GST) $2.73 (exc GST)
SKU:
2349
Current Stock:
7


Product Description

Now available from Tronixlabs Australia is the new Adafruit Reflective IR Sensor. This is a simple plastic casing with two elements - an IR LED and an IR phototransistor.

You can control the IR LED and turn it on to bounce IR off objects to determine their reflectivity. White and light-coloured objects will bounce the light, so you can detect it.

Black and dark-coloured stuff will absorb the IR light so that it isn't detected. Likewise, if something isn't in the way of the sensor, it won't trigger either. 

adafruit-reflective-ir-sensor-with-470k-and-10k-resistors-from-tronixlabs-australia-0.gif

These sensors are handy when you want to detect if something has passed by the sensor, or a very simple hand-detector. Also sometimes these are used as rotary encoder, if the encoder wheel has black and white stripes, the photo sensor is fast enough to tell you the RPM.

Comes with a 470 ohm resistor (for biasing the IR LED) and a 10K resistor which you can use as a pull-up resistor for the phototransistor. The sensor is breadboard friendly and easy to solder to.

This works best when detecting a light-colored object approximately 5mm away - 2mm to 10mm worked fairly well but your results may vary with the LED brightness, object shininess, etc.

  • 15mm x 18mm x 5mm / 0.6" x 0.7" x 0.2"
  • Weight: 1g

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