Hi circuiters,
I'm am a scout leader and am working on designing a handful of trip wire alarms for use on an upcoming camp.
The basic plan is to have teams of kids playing nerf stealth combat simulations around the very large bushland campsite. Teams score points for eliminating opposing team players (they are only eliminated for a short time before respawning) whilst sneaking around to find resources and equipment to help them for the weekend.
In an effort to make this more challenging, we want to place tripwire alarms around the bushland where we can expect teams to traverse through so if they trip the alarm, all the other teams will know where they are and theoretically come and attack them with their nerf blasters.
I already have several alarms, either purchased or built, but am wanting to make a final one using a 12v truck horn, flasher relay (to sound the horn intermittently) and a timer circuit to automatically shut the alarm off as the horn is 150db and an accidental trigger by wildlife overnight would be deafening for 20mins or so until I could get to the trap to turn it off.
I have a fair amount of electrical knowledge and am comforbuilding circuits but have no experience with creating timer circuits so am chasing some help in how to go about setting it up.
I would be super happy with a timer circuit that energises the flasher relay for 30 seconds then powers off.
Hope someone can help!
I'm am a scout leader and am working on designing a handful of trip wire alarms for use on an upcoming camp.
The basic plan is to have teams of kids playing nerf stealth combat simulations around the very large bushland campsite. Teams score points for eliminating opposing team players (they are only eliminated for a short time before respawning) whilst sneaking around to find resources and equipment to help them for the weekend.
In an effort to make this more challenging, we want to place tripwire alarms around the bushland where we can expect teams to traverse through so if they trip the alarm, all the other teams will know where they are and theoretically come and attack them with their nerf blasters.
I already have several alarms, either purchased or built, but am wanting to make a final one using a 12v truck horn, flasher relay (to sound the horn intermittently) and a timer circuit to automatically shut the alarm off as the horn is 150db and an accidental trigger by wildlife overnight would be deafening for 20mins or so until I could get to the trap to turn it off.
I have a fair amount of electrical knowledge and am comforbuilding circuits but have no experience with creating timer circuits so am chasing some help in how to go about setting it up.
I would be super happy with a timer circuit that energises the flasher relay for 30 seconds then powers off.
Hope someone can help!