Digital Electronics Final Project

This haunted house will use these devices to scare people more and give them more of a thrill when they go to the haunted house.

Control system 1 will be a a door closing behind someone as they walk into a room. It will close when a light sensor senses darkness when the person covers it, and a pressure sensor will be located underneath the tile that the person will stand on. The logic gates that will be used are the 'not' gate and the 'and' gate. We will use the 'not' gate because the light sensor usually senses light, but we want to to sense darkness. The 'and' gate is needed because we want it to work only when both sensors sense something. The door will only close when both conditions are filled.

Control system 2 will be a ghost popping out from a hiding place when someone walks into the room. It will pop out because we will have a microphone and a heat sensor that can hear someone's footsteps as they walk in. For this, we will used the 'or' gate because if one of them fails, we will have a back up to make sure that it works. The ghost will pop out if the microphone picks up the sound of footsteps, or the heat sensor senses one's body heat, or both.

Control system 3 will be the lights going out when a person walks into the room. The person will walk off of a pressure sensor, and another heat sensor will sense their body heat. For this device, we will use the 'not' gate and the 'and' gate. The 'not' gate is necessary here because the pressure is being released as a condition. The pressure sensor usually works when pressure is applied, not released, so we need the 'not' gate. The 'and' gate is needed because we want it to work only when both sensors sense something.