AboutDave Nyce Expertise I have been an electronics engineer for 25 years. I can answer questions on analog and digital circuits and my specialty is sensors.
Experience I am the inventor on 23 US patents, and also some foreign ones. Developed sensors for over 25 years. Licensed private pilot (airplane and rotorcraft), have HAM radio license. I'm not an expert in computer networking.
Expert: Dave Nyce Date: 3/24/2003 Subject: sensor and switch circuits
Question I am a graduate student in Architecture and have the following question;
I have a room with two doors, both closed. one gets opened, after the person enters, the door closes and both doors lock until the person turns a switch in side the room to unlock both doors.
Could you draw a schematic diagram of how this would work? Would you use two computer controlled switches for the doors set on a motion detector?
thank you very much for any info you can give, Marcel
Answer I'm not sure I understand why you would need a motion detector or a computer. Unfortunately there is no way on this website to send a schematic, and I don't have the time to dedicate to this site to use other ways.
You can use two electrically operated door locks, a "door closed" sensor on each door, and a 10 second timer switch inside the room. You would wire them so that when both door switches are closed, they energize the door locks to lock. The timer switch inside the room would interrupt this circuit for 10 seconds when pressed, allowing time to exit the room before the system reverts to bieng controlled by the door switches again.
