Hi guys!
I don't have a lot of experience with electronics, just following and adapting schematics.
I adapted this retro-reflective sensor schematics
https://create.arduino.cc/projecthub/mova2/long-range-beam-break-sensor-with-reflector-panel-4dfc48 into something that works at 1.5 meters.
I played with the LED resistor to limit the power and work at 1.5 meters. But now, if an object passes too close to the emitter / sensor box it reflects back and does't break the IR barrier.
Also, I'm using reflective tape to reflect the beam on the wall.
I use a SFH4545 LED and a TSSP4038 receiver and it works 90% of the time, except when something smooth like a hand or something closer passes.
I was thinking of trying a TSSP4P38 for it, but I'm not sure, I see that it's used as more of a distance mesurer without a reflective surface. I really want to use the reflective tape because I'm afraid it will reflect from the wall or something.
Thank you for anything!
George