This infrared object detection sensor has a pair of infrared transmitting and receiving LEDs. Infrared is emitted at a certain frequency, when and when meet an obstacles (reflecting surface), reflected infrared is received. After the comparator circuit processing, green indicator will light up, at the same time a digital signal (a low level signal) is detected at the OUT pin.

Distance can be adjusted using the potentiometer knob. Effective distance range 2 ~ 30cm and working voltage is 3.3V to 5V. 

Features

• Effective Range:    2:30 cm (Adjustable by potentiometer)
• Voltage Supply:      3.3: 5Vcc
• Detection Angle:     35°
• The comparator uses the LM393
• LED indicator (red---> power on, Green---> detection)
• Digital output