thegreenone63
- 4
- 0
Hey,
I am interested in building a simple silent alarm for a door. All I want to do is set up a system so that a light will blink when the door is opened. I am trying to set this up in a school building for when another teacher enters the room unexpectedly. I'm a TA and it makes it very difficult not to get the teacher in trouble when she keeps coming in and no one notices. Thanks!
I am interested in building a simple silent alarm for a door. All I want to do is set up a system so that a light will blink when the door is opened. I am trying to set this up in a school building for when another teacher enters the room unexpectedly. I'm a TA and it makes it very difficult not to get the teacher in trouble when she keeps coming in and no one notices. Thanks!