TCRT5000 Infrared Signal Reflective Track Sensor (3.3V-5V),IR Photoelectric Switch Barrier Line Indicator Module for Robot Arm Smart Car Robotic Kit (Pack of 10)

I made a touchless candy dispenser for the pandemic. I used 3 of these sensors. One would start the machine when a hand was waved under it and two were used to sense if the candy dropped out. All three worked perfectly. It is important to note that the range of these sensors isn't very far, but for me that was fine. The sensitivity adjustment potentiometer worked fine as well.I know some people have had issues with not all of them working, but I don't see any reason to lower the stars since everything worked as expected for me. If I have a problem with any of the remaining 7 sensors, I'll update this review.These sensors were used with an Arduino Nano.

Out of the 10, 2 of them were defective since none of the LEDs would glow and no data was being outputted to the digital or analog outputs. They should be tested before being implemented into a project. Despite this, the sensors worked well in my project, and having both an analog and digital output is a huge plus. The digital output can be easily adjusted with the potentiometer on the board.

The sensors were great and it came on time as well. I was able to finish my project.

Great price for a bunch of sensors. So far all the ones I've used worked

Functioned adequately, though due to quality assurance shortcomings some of leds needed to be resoldered or bent into a usable position. Nevertheless, all components functioned properly.