TCRT5000 Reflective IR sensor


The TCRT5000 Reflective IR sensor photoelectric switch is perfect for line tracking robot car-like DIY projects. TCRT5000 is a reflective sensor that includes an infrared emitter and phototransistor in a leaded package that blocks visible light


  • Compact construction
  • Senses the presence of an object by using the reflective IR beam from the object


Pin NamePin Description
CollectorThe collector of the phototransistor is connected to +5V
EmitterThe emitter of the phototransistor is grounded through a resistor
AnodeThe Anode of the photodiode is connected to +5V
CathodeThe Cathode of the photodiode is grounded through a resistor


Color Black + blue
Detecting range0.591″ (15mm);
Detecting methodReflective
Collector-Emitter Voltage70V
Collector Current100mA
Forward Current60mA
Output typePhototransistor


  • Line following robots: The TCRT5000 reflective IR sensor is commonly used in line following robots. By emitting infrared light and measuring the intensity of the reflected light, the sensor can detect changes in surface color or reflectivity. This allows the robot to follow a specific path or track a line by continuously adjusting its movements based on the sensor readings.
  • Object detection: The TCRT5000 IR sensor can be utilized for object detection in various applications. It can detect the presence or absence of objects within its range by analyzing the reflected infrared light. This makes it useful in automated systems such as vending machines, conveyor belts, or security systems where the sensor can trigger actions or alerts based on the presence or absence of objects.
  • Proximity sensing: The TCRT5000 sensor can also be employed for proximity sensing applications. By measuring the intensity of reflected infrared light, the sensor can determine the distance between the sensor and an object. This makes it suitable for use in devices such as touchless switches, obstacle detection systems, or proximity sensors in robotics, enabling precise and reliable detection of nearby objects without physical contact.


Download the Datasheet of TCRT5000 Reflective IR sensor from the link given below.