Hello all, I have a sort of safety type question to run past you…
I have displays set up at Christmas and Halloween that require triggering when someone enters my gates, but not when they are leaving. I’ve tried a couple of things including PIR’s, ultra-sonics, IR LEDS etc with none really working that well especially in high winds and a bit of drizzle etc. The simplest way I can think off would be to have two beams that get broken as some one walks past and by looking at which one breaks first work out if they are entering or leaving. I know this can false trigger if multiple people, but I can live with the few error s that’ll cause.
My gateway is around 5-meter width so round trip of 10 meters. It would be simple to use a cheap red laser and bounce it off a reflector but as it’s visible it would attract attention and possibly cause people to look into the beam (especially kids) . IR diodes aren’t powerful enough or maybe if I could collimate them but that doesn’t seem easy to do. So, is there an IR laser module that is 100% guaranteed eye safe? As it would be hidden and an invisible beam someone looking into the beam would be unlikely but still, I’d want to be sure. Is there such a thing? I have another project on the back burner of a wall writer with the wall being coated in IR excited paint, but this too would need 100% guaranteed eye safe laser…Thanks for reading
I have displays set up at Christmas and Halloween that require triggering when someone enters my gates, but not when they are leaving. I’ve tried a couple of things including PIR’s, ultra-sonics, IR LEDS etc with none really working that well especially in high winds and a bit of drizzle etc. The simplest way I can think off would be to have two beams that get broken as some one walks past and by looking at which one breaks first work out if they are entering or leaving. I know this can false trigger if multiple people, but I can live with the few error s that’ll cause.
My gateway is around 5-meter width so round trip of 10 meters. It would be simple to use a cheap red laser and bounce it off a reflector but as it’s visible it would attract attention and possibly cause people to look into the beam (especially kids) . IR diodes aren’t powerful enough or maybe if I could collimate them but that doesn’t seem easy to do. So, is there an IR laser module that is 100% guaranteed eye safe? As it would be hidden and an invisible beam someone looking into the beam would be unlikely but still, I’d want to be sure. Is there such a thing? I have another project on the back burner of a wall writer with the wall being coated in IR excited paint, but this too would need 100% guaranteed eye safe laser…Thanks for reading