Question 40
Imagine you are the manager of a bank or a top-secret research facility. Security is very important — you do not want anyone breaking in to steal your money or your secrets! You want an alarm to alert you in some way if an intruder tries to open any windows or doors.
Your task is to design a system using an electrical circuit that lets you know if anyone tries to enter your building. It can be as simple or as complex as you like. The topics covered in this chapter should help you.
Work in groups. Discuss what your system needs to do. Use the following questions to help you. You can use the Internet or other sources to help you with your research.
- How will you detect whether a door or window has been opened?
- Do all doors and windows need to be installed with alarms?
- Can you do this with a single circuit?
- What will happen if a door or window is opened? Will an alarm sound? Will a security light switch on? Perhaps there is a way of directly linking the alarm to the police station.
Your task is to design a system using an electrical circuit that lets you know if anyone tries to enter your building. It can be as simple or as complex as you like. The topics covered in this chapter should help you.
Work in groups. Discuss what your system needs to do. Use the following questions to help you. You can use the Internet or other sources to help you with your research.
- How will you detect whether a door or window has been opened?
- Do all doors and windows need to be installed with alarms?
- Can you do this with a single circuit?
- What will happen if a door or window is opened? Will an alarm sound? Will a security light switch on? Perhaps there is a way of directly linking the alarm to the police station.
