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SENSORS / MOTION / IR BREAK BEAM SENSOR - 3MM LEDS
DESCRIPTION
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.
IR Break Beam Sensor
- 3mm LEDs
PRODUCT ID: 2167
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DESCRIPTION
TECHNICAL DETAILS
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 we 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 our 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
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