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Ken · 9th Apr 2020, 6:30 pm

It has an IR tx and rx. They are mounted along side each other. When it's powered if you move your hand above these it operates a small relay and operates the red LED mounted beside it on the same board. I've tried it with my hand about 2ft above and it seems quite sensitive. The sensitivity can be adjusted. I think it would work at a greater distance though don't know how reliable it would be. According to the markings on the relay it would switch 230V at 3A though I don't fancy trying that. The idea reminds me a bit of the break beam alarms you could make with an old black painted OCxx transistor with the paint removed. Not very useful but I bought it as one of Banggood's "flash deals" so it was very cheap. I was just looking for something to do when I built it so I don't really have a use for it. Thanks again for the help.

Regards,

Ken.

9th Apr 2020, 6:30 pm	#7
Ken Hexode Join Date: Oct 2003 Location: Near Glasgow, UK. Posts: 309	Re: Zener diode problem with Banggood kit. It has an IR tx and rx. They are mounted along side each other. When it's powered if you move your hand above these it operates a small relay and operates the red LED mounted beside it on the same board. I've tried it with my hand about 2ft above and it seems quite sensitive. The sensitivity can be adjusted. I think it would work at a greater distance though don't know how reliable it would be. According to the markings on the relay it would switch 230V at 3A though I don't fancy trying that. The idea reminds me a bit of the break beam alarms you could make with an old black painted OCxx transistor with the paint removed. Not very useful but I bought it as one of Banggood's "flash deals" so it was very cheap. I was just looking for something to do when I built it so I don't really have a use for it. Thanks again for the help. Regards, Ken.