Hello all,
I am trying to come up with a solution to an increasingly problematic issue where i am. Vandals always steal transformer feeder cables (abt 50mm pure copper) and render whole neighbors without electricity.
So far i am using a satellite modem to relay a text message to nearby recipients and power holdings officials in the event of such an occurence. The problem is the message delivery time is very erratic (sometimes within 2mins other times as long as 15mins).
To tackle this i am considering incoorporating an alarm circuit into the existing solution such that once the tampering occurs, a siren goes off.
The solution as it is right now is such that a monitoring cable runs along the feeder cables and is continous all through to the satellite modem such that in order to steal the feeder cables, one would have to break the continuity of the monitioring cable, this action is what triggers the satellite modem to send an sms.
I would like to add a circuit such that the action of breaking the continuity would trigger the siren going off.
P.S
The satellite modem contacts can not accept current i.e. they are dry contacts hence the use of only continuity.
I am trying to come up with a solution to an increasingly problematic issue where i am. Vandals always steal transformer feeder cables (abt 50mm pure copper) and render whole neighbors without electricity.
So far i am using a satellite modem to relay a text message to nearby recipients and power holdings officials in the event of such an occurence. The problem is the message delivery time is very erratic (sometimes within 2mins other times as long as 15mins).
To tackle this i am considering incoorporating an alarm circuit into the existing solution such that once the tampering occurs, a siren goes off.
The solution as it is right now is such that a monitoring cable runs along the feeder cables and is continous all through to the satellite modem such that in order to steal the feeder cables, one would have to break the continuity of the monitioring cable, this action is what triggers the satellite modem to send an sms.
I would like to add a circuit such that the action of breaking the continuity would trigger the siren going off.
P.S
The satellite modem contacts can not accept current i.e. they are dry contacts hence the use of only continuity.