Infrared Obstacle Avoidance Proximity Sensors Module has built-in IR transmitter and IR receiver that sends out IR energy and looks for reflected IR energy to detect presence of any obstacle in front of the sensor module. The module has on board potentiometer that lets user adjust detection range. The sensor has very good and stable response even in ambient light or in complete darkness. The sensor module can be interfaced with Arduino, Raspberry Pi or any microcontroller having IO voltage level of 3.3V to 5V.

• Obstacle avoidance in robots
• Production counting on assembly lines
• Presence detection
• Security systems

• When the module detects an obstacle in front of the signal, the green indicator on the board would light on the level. And the OUT port sustains low signal output.
• The module detects the distance of 20~300mm and angle of 35 °.
• The detective distance can be adjusted by potentiometer. Clockwise adjusts potentiometer, distance increases; counterclockwise adjusts potentiometer, distance decreases.
• The reflectivity and shape of target is the key to detect the distance.
• The sensor module output port OUT can be directly connected to the microcontroller IO port, or directly drive a 5V relay. Connection mode: VCC-VCC; GND-GND; OUT-IO.
• Adopts LM393 comparator, has stable performance.
• Can be powered by 3-5V DC power. When power on, the red power indicator light turns on.
• Has 3mm screw hole, which is convenient for fixing and installation.
• The threshold comparison voltage has been adjusted through the potentiometer.
• Widely used in robot obstacle avoidance, black and white line tracking and so on.

• Model Number: FC-51
• Detection angle: 35 °
• Operating Voltage: 3.0V – 6.0V
• Detection range: 2cm – 30cm (Adjustable using potentiometer)
• pcb size : 3.1 cm (L) x 1.4 cm (W)
• Overall Dimension: 4.5cm (L) x 1.4 cm (W), 0.7cm (H)
• Active output level: Outputs Low logic level when obstacle is detected
• In-active output level: Outputs High logic level when obstacle is not detected

• at 3.3V : ~23 mA
• at 5.0V: ~43 mA

Pinouts

• VCC: 3.3V-5V power input pin
• GND: 0V power pin
• OUT: Digital Output Pin

• 1 x Infrared Obstacle Avoidance Proximity Sensors Module