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devilmp4
Joined: 26 Aug 2008
Posts: 15
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 13 Oct 2008 3:42 door contact |
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| hi all , i am doing a sms access door system project and i nid something like a door sensor to sense if the door is closed properly or something.anybody have any information that u could provide?thanks.
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banjo
Joined: 24 Dec 2005
Posts: 473
Helped: 89
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| 13 Oct 2008 13:25 door contact |
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Typically sensing door closure is done with a magnetic switch. The system consists of a reed relay and a magnet. The magnet is mounted on the door and the reed relay is mounted to the door frame. See link below for an example.
http://www.starkelectronic.com/admsw2.htm
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pranam77
Joined: 22 Apr 2008
Posts: 115
Helped: 8
Location: The heaven
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| 13 Oct 2008 15:10 Re: door contact |
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Hai friend. Found these kits on www.united77.com which may be helpfull for you:
Secured Access control system with Tamper protection. Access control system described here is based on 89C52 is based on digital passwords up to 10 digits for having access to a secured area. The door status is constantly monitored and displayed on a 16x2 LCD module and is highly secured even in an event of power failure. Wrong password protection for 3 attempts and a master code for resetting the system is provided in the system. An intermittent warning buzzer for password tampering and a loud siren is provided to door tampering detection. A on board relay is provided with a 3 Pin PBT connector for any external loads to be connected.
RFID based Keyless lock with Atmel 89C52. Just imagine you at your door of your house and it unlocks as you are nearby or when you wave your wallet waved at its reader. The access to the door is only granted to those persons having a valid RFID card. In case you loose your card, still you can open the door by just entering the 10 digit master code provided with the kit. The door status is constantly monitored and displayed on a 16x2 LCD module and is highly secured even in an event of power failure. Wrong password protection for 3 attempts with intermittent warning buzzer for password tampering and a loud siren is provided to door tampering detection. A on board relay is provided with a 3 Pin connector for any external loads to be connected. In case of invalid card is swiped, the system is deactivated for 60 seconds. The kit will be provided with a RFID reader module, Master kit module, and two valid RFID cards.
Good luck
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