Description

Obstacle Avoidance Sensor is a distance-adjustable, infrared proximity sensor designed for wheeled robots.
The sensor detection distance ranges from 2cm to 40cm, it can be adjusted by turning the potentiometer knob. The operating voltage is 3.3V-5V so it is suitable for a variety of microcontrollers like Arduino, ESP32, Teensy, ESP8266, Raspberry Pi, and others.
It has strong adaptability to ambient light and it is fairly accurate to sense changes in the surrounding environment.
The module has a pair of infrared LEDs, an emitter and a receiver. The emitting LED sends infrared light pulses at a certain frequency. When the light hits an obstacle is reflected back to the receiver LED.
It has 4 pins: GND, +, S (out), and EN. The jumper makes the module permanently enabled so its always detecting for obstacles. To control the state of the sensor remove the jumper and use the EN pin, a HIGH signal will enable the sensor and a LOW signal will disable it.
You can adjust the detection distance by turning the left knob, turn it to the middle for maximum distance. The right knob controls the frequency of the emitting IR pulse, turn it clockwise all the way to set the emitter to the right frequency required to work with the receiver.

For more info

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