Category: Safety and Security

Universal Lock

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---- PROTOTYPE --------- PURPOSE: To create a prototype of universal lock that allows children with disabilities to operate a school locker. In middle and high school, almost every student secures their locker with a dial combination lock. Individuals with cerebral palsy or spinal cord injury may be unable to use these types of locks due to a lack of motor or cognitive skills necessary to open a standard lock. A universal lock prototype was created and tested on children with special needs. The lock allows users to unlock a locker using a remote control. The lock is an electronic lock that is controlled by a remote control. The remote sends a binary code through an infrared signal to unlock the lock. The solenoid is controlled by a microcontroller circuit in the lock that interprets the infrared signal from the remote. A solenoid within the lock body controls the locking and unlocking. The lock will only unlock when the binary signal sent from the remote matches the binary code stored in the microcontroller. The remote is designed to be easily actuated by an individual with limited cognitive and physical skills. In addition, the remote has a 3.5 millimeter jack so that an external switch of the user’s choosing can be used to actuate the remote. This additional feature allows a wider range of individuals to use our lock because our design is compatible with a wide variety of existing switches. The cost for parts and materials was approximately $700. TITLE: Universal Lock: A Device that Allows Children with Disabilities to Operate a School Locker. JOURNAL: NSF 2010 Engineering Senior Design Projects to Aid Persons with Disabilities. REF: Chapter 8: pp. 86-87. PAGES: 3 with cover. 2010.


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Universal Lock