Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 40 | RFID Door Lock |
Arely Irra David Sullivan Nich Rogers |
Nikhil Arora | design_document2.pdf design_document1.pdf final_paper1.pdf photo1.jpg photo2.jpg presentation1.pptx proposal2.pdf proposal1.pdf video |
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| Nich Rogers (Nroger5) Arely Irra (airra2) David Sullivan (davidrs3) # RFID DOOR LOCK [Link to Discussion](https://courses.engr.illinois.edu/ece445/pace/view-topic.asp?id=71842) [Simple High Level Diagram](https://docs.google.com/document/d/1wcPRO_gitld9lWCwFr9iQTqBeHypjF9-k5uXQeYU6p4/edit) # Problem The objective of the RFID Door Lock is to create a mechanism to unlock your door using an RFID tag. The reason for this is there are many factors that can cause someone to be unable to manage to get their key into a door lock including but not limited to low lighting, debris in the lock, inebriation, disability such as blindness, diseases like parkinsons and more. This is a safety hazard if you get locked out of your apartment due to any previously mentioned scenarios. # Solution Our RFID Door lock would be a non-intrusive mount for a door that would scan an RFID chip located on your person like a keychain. Previous market implementations have RFID tag solutions but many require costly infrastructure such as scanners mounted to walls or the door locks replaced with new smart locks, which for someone renting like a college student can incur costs from loss of safety deposit or may even lock a landlord out when doing apartment showings due to some removing the key hole entirely. # Solution Components # Front Door RFID Scanner The RFID scanner portion that exists outside the front door would have a housing unit containing the[ RFID scanner](https://www.digikey.com/en/products/detail/dlp-design-inc/DLP-RFID2/3770244), an LED to blink red or green for success/failure to unlock, a buzzer for playing audio for success/failure to unlock and finally a [wireless power receiver](https://www.digikey.com/en/products/detail/vishay-dale/IWAS4832AEEB120KF1/10223651?utm_adgroup=Inductors&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Supplier_Vishay&utm_term=&utm_content=Inductors&gclid=EAIaIQobChMIgLLB2v7v_AIVKcmUCR1wXQ7uEAQYASABEgIWafD_BwE). This unit will likely be a 5x5x2 inch housing unit mounted above the previous lock using longer screws to go through our unit and keep the old lock in place. # Remote battery pack with RFID tag We have multiple ideas for unit powering. The first is an ambient light [amorphous solar cell](https://www.digikey.com/en/products/detail/panasonic-bsg/AM-1801CA/869-1003-ND/2165188) which can recharge an internal battery removing the need to ever replace it. This works in low light as well so indoor and outdoor units can both be recharged passively. If the unit ever runs out of battery our second is the wireless power transmitter and receiver, the receiver lives in the door as previously stated and a [transmitter](https://www.digikey.com/en/products/detail/tdk-corporation/WRM483265-10F5-12V-G/10484695?utm_adgroup=Wireless%20Charging%20Coils&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Inductors%2C%20Coils%2C%20Chokes&utm_term=&utm_content=Wireless%20Charging%20Coils&gclid=EAIaIQobChMI6L6y5_7v_AIV8oJbCh120giXEAQYAiABEgJQlfD_BwE) would be within a portable pack that could fit on the back of a phone or within a wallet so you could tap a card, have the rfid reader read the tag and then have the transmitter send power to the unit which it would use to power the linear actuator. # Inside Door Control Unit The inside of the door would house the control unit containing our PCB to control the outside door buzzer,LEDs and receive info from the RFID scanner. This inside unit would also control the [linear actuator](https://www.amazon.com/USLICCX-Actuator-Electric-Massage-Recliner/dp/B07X3Z68GV/ref=sr_1_3?keywords=mini%2Blinear%2Bactuator&qid=1675109676&sr=8-3&th=1) used to rotate the door lock to unlock it upon successful RFID scan. This unit would exist/work with previous infrastructure on the door and not replace the door handle. It would again use longer screws in the same holes to mount our unit above the existing lock but still leaving access to it. The inside will also house buttons and LEDS as a user control and informational unit to how many key fobs are active on the door or to add more using the master fob. For security the system will also detect should the door be left unlocked based on position of the motor so having a sensor or a motor with location(extended retracted) info available, the system would also optionally lock the door automatically by detecting when the door shuts. The housing unit for the PCB, microprocessor and battery pack to power the whole system will likely fit within a 5x5x2 inch housing unit. We will likely use a [STM32F103C8T6 microprocessor](https://www.snapeda.com/parts/STM32F103C8T6/STMicroelectronics/view-part/) due to the instructions needed to implement clock functionality to relock the door after a time out. # Power and data transfer Our implementation will work in tandem with deadbolt locks which are bored through the door which leaves space for wires to pass through within the same hole the deadbolt lock is mounted in. # Criterion for success Our criterion for success aligns nearly identically with the solution components and the main idea of the solution. First is that our design can be mounted without the use of screws that may damage the door, and without replacing any current existing door handles or losing any functionality of the current door such as no blocking the key lock hole. Second is an RFID tag will be able to unlock the door via the internal motor when scanned as well as give audio and visual feedback via the speaker and LED housed outside the door in a weather resistant housing due to some apartments being in adverse conditions. Third, the internal unit must be able to give the master fob access to adding and removing new fobs either manually or via a set time-out via buttons and have an LED display panel to visualize how many active fobs there are on the door. Fourth is both power options with an amorphous solar cell to recharge the unit's internal battery as well as a portable casing to carry wireless power transmitter and RFID tag within it. Finally the internal unit will house the PCB,power and control unit that will be able to house and manage these functions. |
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