Graduation Project Presentation. Combination Lock Opener . Prepared by: Lina Shaâ€™er & Hala Omar . Supervisor: Dr. Samer Mayaleh . Itâ€™s A kind of Locks that you have to select a set of digits â€“ combination - in order to open it.
It’s A kind of Locks that you have to select a set of digits –combination- in order to open it.
For the normal person to try the all possible combinations (40×40×40 = 64,000)
It would take
With the new algorithm developed in this project to Crack the lock resulted in reducing the number of the possible combinations to 100 possible combinations.
To try these 100 combination it takes
Finding the 3rd number by finding the Gates
12 gate will be found
Combinationof the Lock
5 of the gate will be whole number
7 of the gates will be half number
The last digit of one of whole number will be different from the restCracking the lock.
This number is the 3rd number of the combination
Take this remainder
Divided by 4
If it is 0 or 1 add 2 to it if it is 2 or 3 subtract 2 from it
Take the remainder
12 % 4 = 0
Then add 4 to this number until you reach the highest number (39)
This is the first possibility of the first number
To find the other add 4 to this number until you reach the highest number (39)
Now, We have 10X10 = 100 possible combinations
Stepper Motor Driver
In forward :
Half Number divisions
40 black and 40 white
Whole Number divisions
20 black and 20 white
The black mark is aligned with zero on the lock
They are 3 photo Sensors.
2 are attached to the top of the fly Wheel , and the 3rd at the Bottom of the fly Wheel.
photo sensitive BJT