"Murmansk69" wrote in message
oups.com...
I'm looking for a device like a cordless doorbell but with an infrared
detector rather than a push-button.

It's to mount in a shop near the door so that when someone comes in it
alerts the person in the back room that someone has come in.

It needs it to be cordless rather than having to be wired in.

(This is for use when the door of the shop is left open in the summer -
there is CCTV but that wouldn't stop someone nipping and running off
with something if the owner wasn't looking at the monitor all the time)

Can anyone suggest any websites that sell such things?

Thanks


12v powersupply running a domestic alarm PIR driving a small 12v buzzer via
a relay to swap "mode" of output relay. The PIR relay will trigger for about
2 seconds on every detection. No more than £40

Oooops, just read cordless!

OK then why not do as above, but instead of the relay driving the buzzer,
wire the relay contacts up to the push button circuit on a wireless
doorbell?