Hey, Has anyone played bought these cheap wirless infrared sensor,they look too good to be true at $15 + shipping via ebay
Do they work as claimed seller says 50m straight distance and they set off a led or bell,maybe only reciver distance? Question: using a relay off the led or bell how could I easily set these to make a continuous alarm,powering either a stobelight or siren.(I gather these just send a signal when the intruder passes the beam) Or how could I use resistance in the circut to set a continuos alarm through a pre-existing alarm panel? these are cheap compared to the dse models at $100 had to ask before doing home work! TIA