HiLetgo 10pcs IR Infrared Obstacle Avoidance Sensor Module for Arduino Smart Car Robot 3-Wire Reflective Photoelectric for Arduino Smart Car Robot

Funcionan muy bien, no obstante la indicación de que detectan a más de 5 cm es según la luz ambiente y el material que refleje.

Funziona bene, comunque difficilmente oltre i 10 cm a meno di non avvicinare uno specchio o un metallo riflettente. Per il resto ottimo rapporto qualità prezzo.

Features: 1, When the module detects an obstacle in front of the signal, the green indicator lights up at the board level and the OUT port keeps the signal output low, the module detects a distance of 2-30 cm, detection angle 35 °, adjusted clockwise adjustment potentiometer, distance can detect potential, detect increasing distance. Adjusted counterclockwise potentiometer, shortened detection distance. 2, active infrared reflection detection of sensor, reflectance of target, therefore shape is critical detection distance. Minimum detection distance is black, white, maximum. Small objects away from small areas, large areas from ground. 3, sensor module output port OUT port can be connected directly to the microcontroller. IO can also drive a 5V relay directly. Connection: VCC-VCC; GND-GND; OUT-IO 4, Comparator LM393, Stable; 5, Module can be 3-5V DC power supply. When powered on, red power indicator will be on; 6 , Easy to fix if screw hole is 3mm; 7, Board size: 3.2CM * 1.4CM 8, Each module is shipped potentiometer adjusted threshold comparator voltage. PIN description : 1 VCC 3.3V-5V External Voltage (5v and 3.3v MCU Can be directly connected to MCU) 2 GND GND External 3 OUT Small Board Digital Output Interface (0 and 1)

3 units out of 10 are not functional and not getting any output even the power LED is on, fortunately I only need 6 and extra was spare parts.

Was quite impressed with the units. Each unit was packaged and sealed in a static bag and all were over packed in one bag. Before using the units I tested each one and everyone of the sensors worked. I am using them at 4.5Vdc and they are maxing out sensing objects at 10-13 cm. The units have an adjustment pot so you can vary the distance and two LED's, one to indicate power and the other when an object is sensed will light. I found this helpful in fine tuning the sensor. I visually inspected the modules and they all looked to be well manufactured especially for the price.