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TCRT5000L Infrared (IR) Reflective Optical Emitter / Sensor w/ Transistor Output

5 Piece Package

The TCRT5000 / TCRT5000L is a reflective IR sensor. It has both a Photodiode and a Phototransistor coupled in its package. The photo diode has two pins (Anode and Cathode) which can be used to generate an IR signal. Similarly the Photo transistor also has two pins (Collector and Emitter) which can be used to read the IR signal that is reflected back. The TCRT5000L can be used to detect an object or any other reflective surface in front of it, and with some level of programming, it can also calculate the distance of the object in front of it, however, the distance can only be calculated for short range objects and is also subject to environmental disturbance. To measure the distance of an object in front of a sensor, the HC-SR04 Ultrasonic sensor is probably a better choice.

The package includes two integrated plastic mounting clips for snap-in assembly to a PCB or mounting panel. The TCRT5000L (sold here) is the long lead version.

Features:

Package type: Leaded
Detector type: Phototransistor
Dimensions (L x W x H in mm): 10.2 x 5.8 x 7
Distance for maximum collector current: 2.5 mm
Operating range within > 20 % relative collector current: 0.2 mm to 15 mm
Typical output current under test: IC = 1 mA
Daylight blocking filter
Emitter wavelength: 950 nm

Pin Configuration (See pinout drawing and sample schematic in image gallery):

1	Collector	The collector of the phototransistor is connected to +5V
2	Emitter	The emitter of the phototransistor is grounded through a resistor
3	Anode	The Anode of photodiode is connected to +5V
4	Cathode	The Cathode of photodiode is grounded through a resistor

Applications:

Proximity detection applications
Obstacle detection and avoidance
Detection of reflective material such as paper, IBM cards, magnetic tapes etc.
Line follower or maze solver robots
Limit switch for mechanical motion

How to use the TCRT5000:

The TCRT5000 photo diode should be powered through a current limiting resistor with a value of ~150 to ~220 Ohm, and the Transistor is also grounded through a 10K resistor as shown in the sample circuit schematic in the photogallery. The transistor does not have a base pin because the biasing of the transistor is controlled by the amount of IR light it receives. So basically the IR light from the photo diode hits an object/surface and returns back to the photo transistor to bias it.

Package Includes:

5x (5 Pieces) TCRT5000L Reflective Optical Sensor Infrared IR Detector Switch

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