Logic Gates

You have been asked to program traffic lights at an intersection.

• Program two traffic lights so that when one light turns green, the other will always be red, and vice versa.

A customer wants a smart system for their garage.

• License plate recognition installed at the entrance opens the garage door when they drive in.
• A button inside the garage opens the door from the inside when they leave.
• Program a solution that opens the garage door whenever either the button or the recognition is activated.

Your customer wants a simple alarm system for their home, with the ability to disable the alarm. The home has 6 windows with glass break detectors, and 1 door with a contact.

• If any of the glass break detectors is triggered, an alarm should sound.
• If the door contact is triggered, an alarm should also sound.
• The alarm should NOT sound if it is disarmed using a code or button.

A company issues two types of access cards: guest cards and employee cards.

• Employees always have access to the parking garage (24/7).
• Guests have access only on weekdays, during working hours.

The customer wants to increase energy savings and daily comfort with automated outdoor lighting and a garden gate that remains unlocked for deliveries.

• Outdoor lights should turn on automatically at dusk.
• Outdoor lights should turn off automatically after midnight.
• Outdoor lights should turn on if it’s dark and the garden gate is opened.
• Outdoor lights should NOT turn on if it’s daylight, even when the garden gate is opened.

Your customer has a large building with fire alarm (ABA), intrusion alarm (AIA), and KNX installations, all integrated into a Building Management System (BMS).

• In case of fire, all doors and grilles should open completely to allow evacuation and fire department access.
• In case of a break-in, the building should go into lockdown (all doors and grilles locked).
• The fire department should be notified in the event of a fire.
• G4S should be alerted in the event of a break-in.
• In case of a false alarm on either system, a technician should be called.

A hotel has a large hall with three lighting zones. They recently installed two new folding walls to divide the hall into three separate rooms.

• Automate the system to split the lighting controls so each switch controls its respective lighting zone when walls are closed.
• Allow for flexibility: If only one wall is closed (creating one large and one small room), the lighting controls should adjust to match this configuration.

A family wants to automate their lights, thermostat, and security cameras for energy efficiency and security.

• When no one is home: All lights off, thermostat off, cameras activated.
• When someone is home: Lights on, thermostat adjusts to presets, cameras turned off.
• If a break-in alarm triggers: All lights turn on, thermostat turns off, cameras activate (overriding the "someone is home" rules).

A laboratory needs an access control mechanism with three specific clearance levels.

• Regular employees have access only during working hours (07:00 to 16:00).
• Managers have access on weekdays at any time (but not on weekends or holidays).
• Technicians always have access (24/7/365).
• If a person without an access card attempts to enter, an alarm should be triggered.

An office building wants to optimize energy consumption by implementing intelligent lighting control.

• When no one is present, lights should automatically turn off.
• If motion is detected, lights should automatically turn on.
• If there is enough natural daylight, lights should turn off (regardless of motion detection).
• Lights should be scheduled to turn on before the workday begins and off after working hours.