Topic: Shed alarm

[adam04]

just looking at an alarm for my shed.

http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=101422&ts=63168&id=92633

Wondered if anyone with any knowledge thought it would be possible to connect to a mains supply (guessing its batteries) and if i would also be able to connect a normal PIR aswell as the door contacts to it?

[Curryandchips]

The device IS battery operated, this is detailed in the instruction manual. You could always use a rechargeable PP3 battery if you are concerned about battery consumption. The equipment will not be suitable for connection to the mains without a rectified transformer output of the correct power. You would also need a suitable fuse in the circuit, so that you dont burn the shed down in the case of a fault. Bear in mind that it may cost you a disproportionate amount to alter the equipment. Connecting a PIR does not seem practical with the existing arrangement, although it is possible in principle.

My opinion? Don't bother.

[keef]

Bit of an overkill, but my company sells SMS text based alarm units. We've never sold one to monitor a shed though. Connect up to 4 PIR's, door switches to the unit - stick a SIM card in it. It'll send you a text message direct to your mobile if an alarm occurs - so you can get down there sharpish with a baseball bat.

You can also connect a temperature sensor to it, so you could use it for frost detection aswell....