SparkFun Electronics - Infrared Emitters and Detectors

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Infrared Emitters and Detectors

sku: SEN-00241

Description: Side-looking Infrared Emitters and IR Detectors. These simple devices operate at 940nm and work well for generic IR systems including remote control and touch-less object sensing. Using a simple ADC on any microcontroller will allow variable readings to be collected from the detector. The emitter is driven up to 50mA with a current limiting resistor as with any LED device. The detect is a NPN transistor that is biased by incoming IR light.

Datasheets:

IR Emitter (Clear)
IR Detector (Tinted pink)

Applications:

IR Schematic - Basic object detection schematic
Seattle Robotics - Infrared object detection
Robot Room - Excellent website with lots of goodies

Sold as a pair, with one Emitter and one Detector.

Pricing

	3286 in stock backorder allowed

$1.95	price
$1.76	10-99 (10% off)
$1.56	100+ (20% off)

	quantity

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Comments

8 comments

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	by lualua +1.9 \| Oct 2, 2008 at 12:11pm 0
what sort of range for detection do we stand to get with this package?

	by bearsinthesea +1.9 \| Nov 3, 2008 at 11:56am 0
Where are the plain photoresistors?

	by JerryA +2 \| Feb 6, 2009 at 3:53pm 0
I wrote about using these to test a camera shutter at the Arduino forum here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1233960430/ These couldn't have been easier to use.

	by EvilTwin +5.1 \| Nov 19, 2009 at 9:45pm 0
What are the odds I can point the detector at a peice of white letter size paper, then point a 940nm laser diode at the paper from a distance and trigger the detector?

	by derekmoore +1.9 \| Nov 27, 2009 at 1:55pm 0
I ordered this pair and received 2 emitters and no detector. Who do I contact about this?

	by ChiefRobot +2.4 \| Jan 31, 2010 at 7:54pm 0
JerrA's code is a good place to start, but has any used 2 sets of these to monitor a doorway. I went to know when someone enters or leaves a room.

	by ThinkerT +0.63 \| Feb 10, 2010 at 1:45pm 0
How far is the range on these? Could you sense something across the room?

superbrad

+9.7

| Apr 17, 2010 at 4:42pm

I'm able to see a noticeable difference in XMega ADC readings (12 bit) across dark/light color differences from a flat surface about one inch away. I think there's even some room for improvement with oversampling.

Though not as handy as the QRD/QRE sensors, the IR transmitter's max forward current is 50mA, twice that of the QRE1113. That extra power translates into extra range. You'll need to test for your own requirements if these will work though - standard YMMV disclaimer applies.