Review on Comimark E18 D80NK Infrared Photoelectric Avoidance by Shafiq Wang

The spec says 5V, and it's no joke. no 3.3V under voltage. The open collector output means you can connect it to any GPIO on your MCU with a pull-up resistor. Active-low detection. I didn't like the weird color scheme of the wires, but the wires were clearly labeled so I can't really fault it. The adjustment screw was difficult to adjust properly, but was sufficient for my application. I haven't tested the 80cm maximum range claim, especially when it was in optimal conditions. Depending on your use case, you might be able to hack detection with reflective tape as a target; to increase range, provide odd-angle detection, and reduce false alarms. I give it a hard 4.