Hello,
I want to make loud door bell. I already have a push button outside the house and wires leading inside the house.
I was wondering if I could use a sound bomb an an old 12v mains unit?
Would the sound bomb make its loud noise when the circuit was completed by somebody pressing the door bell outside and stop making a noise when the person removed their finger from the door bell outside the house? Or do these sound bombs have some complicated electronics inside them that means they have to receive some kind of signal to switch the noise off?
By sound bomb I mean something like:
http://www.ebay.co.uk/itm/Twin-Piez...8518?pt=UK_Burglar_Alarms&hash=item2324f087b6
Many thanks for reading.
I want to make loud door bell. I already have a push button outside the house and wires leading inside the house.
I was wondering if I could use a sound bomb an an old 12v mains unit?
Would the sound bomb make its loud noise when the circuit was completed by somebody pressing the door bell outside and stop making a noise when the person removed their finger from the door bell outside the house? Or do these sound bombs have some complicated electronics inside them that means they have to receive some kind of signal to switch the noise off?
By sound bomb I mean something like:
http://www.ebay.co.uk/itm/Twin-Piez...8518?pt=UK_Burglar_Alarms&hash=item2324f087b6
Many thanks for reading.
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