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Sensors > Infrared

IR Break Beam Sensor - 3mm LEDs

SKU: ADA2167

$4.50 AUD, inc GST
$4.09 AUD, exc GST

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IR Break Beam Sensor - 3mm LEDs
4.5 AUD

SKU: ADA2167

$4.50 AUD, inc GST
$4.09 AUD, exc GST
1 reviews 0 5 5
In stock, with a short lead time. 126 units dispatch in 4 to 7 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Tue, 29th of Aug with Express Post within Australia.

Infrared (IR) break-beam sensors are a simple way to detect motion. They work by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way which is sensitive to that same light. When something passes between the two, and its not transparent to IR, then the 'beam is broken' and the receiver will let you know.

Compared to PIR sensors, breakbeams are faster and allow better control of where you want to detect the motion. Compared to Sonar modules, they're less expensive. However, you do need both emitter and receiver on opposite sides of the area you want to monitor.

This is the 3mm IR version.  It works up to 25cm / 10". You can power it from 3.3V or 5V, but 5V will get you better range and is what Adafruit suggest. The receiver is open collector transistor output which means that you do need a pull up resistor if you want to read a digital signal off the signal wire. Most microcontrollers have the ability to turn on a built in pull up resistor. If you do not, connect a 10K resistor between the white wire of the receiver and the red wire. If you want to control a relay or LED or whatever, it can sink up to 100mA to ground

Check out Adafruit's IR breakbeam tutorial for how to get started quickly

We also carry a 5mm version that works for slightly longer distances.

Technical Details

  • Datasheet
  • Sensing Distance: Approx 25cm / 10"
  • Power Voltage: 3.3 - 5.5VDC
  • Emitter Current Draw: 10mA @ 3.3V, 20mA @ 5V
  • Output Current Capability of receiver: 100mA sink
  • Transmitter/Receiver LED Angle: 10°
  • Response Time: <2 ms
  • Dimensions: 20mm x 10mm x 8mm / 0.8" x 0.4" x 0.3"
  • Cable Length: 234mm / 9.2"
  • Weight (of each half): ~3g

This product is listed in:

Documentation and Resources:
  • IoT Plant Monitor
  • So, my wife wanted to have some small plants in the house. I didn’t, so we compromised, and got some plants. The only thing is that neither of us remembers to water them, so I wanted to build a sensor array to monitor the moisture content of the soil, and notify us when they needed watering. We’ve got 3 plants, all fairly close to each other, and I wanted to create an IoT project so that it could send an email notifi...

Product Comments


Customer Reviews

  1. Review by Tony verified purchaser
    Rating
    100

    Super simple to use. Remember it is an open collector on the receiver unit. (Posted on 29/02/2016)

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
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Unit 18, 132 Garden Grove Parade
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NSW, 2289
Australia

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