Review on 10pcs/Pack DIYmall Arduino Smart Car Robot IR Infrared Obstacle Avoidance Sensor - IR Transmitting and Receiving Tube with Photoelectric Switch by Amicz Kakaruk

Can't say I had high hopes for the DIYmall Infrared Obstacle Avoidance Sensor 10pcs/pack. low price. After all, how are you going to have a PCB, a connector, an IC, an LED, a photo sensor, and some other SMT components and make money from it for about a dollar a unit? Well, I shouldn't have worried. It's cool that the packet represents its output as a digital level because you know the reflected value will be returned to the comparator as an analog value. The digital state makes programming extremely easy, but means you have to adjust the potentiometer for each setting. It doesn't matter, it just needs to be remembered. I've tried tricking the sensor in a number of ways. In a test case I used a different IR LED (in the remote control) and pointed it at the module. I was just curious if he would think that source was a reflection. I don't know if the LED's output is pulsed (or something), but it seems resistant to spoofing. Another test was to point the sensor at a piece of Vantablack-colored laminated foam. It didn't pick up the reflection until they were practically touching, and that was at the maximum pot setting. highlighted.