Skip to main content

Cracking Combination Lock by Mechatronic Exploit

The CRD 3-40 is the mechatronic system that enables to crack a combination lock by exploiting. It was built by Ross Aiken as the class group project for ECE453 - Embedded Microprocessor System Design at the University of Wisconsin - Madison.

The shackle on the padlock is pulled by a solenoid. The position of the dial is accurately determined by an encoder and the stepper motor turns the dial on the lock. The graphical user interface allows to enter known digits, then the system tries to open the lock prioritizing them. The implemented algorithm to figure out the combination is discussed here. The CRD 3-40 is sensitive enough to find all of the 'sticky spots', using them to decrease the number of possible combinations from 64,000 to 80. It consists of a ZedBoard, a custom-designed PCB, a solenoid, a stepper motor, an encoder, and, of course, a lock.

The authors suggest the following further optimizations that could be done in this mechatronics project:

1) Back-dialing the second digit - After dialing in the first digit once, all possible second and third digits can be run if you spin the middle dial backwards at the right times.
2) Decreasing the solenoid hold time - With an improved mounting setup, the hold time on the solenoid could be reduced.
3) Increasing the spin speed - Once again with an improved mounting setup, the spin speed could be improved (as it stands right now, the pressure fit on the dial causes excessive friction between the dial and the case, and spinning too much faster could cause permanent damage to the lock).

Comments

You might also like

    Popular posts

    What is Mechatronics?

    Mechatronics definition Mechatronics is a synergistic combination of precision engineering, electronic control and mechanic systems. It is the science, that exists at the interface among the other five disciplines: mechanics, electronics, informatics, automation, robotics. It is one of the most dynamically developing fields of technology and science. The word 'mechatronics' appeared for the first time in Japan in 1969. mechatronics = mecha nics + elec tronics + computing

    Intro to Mechatronics [e-book pdf]

    Intro to Mechatronics - lecture by Professor Vikram Kapila, New York University Mechatronics Defined Mechatronics: Working Definition for us Product Realization Paradigm Disciplinary Foundations of Mechatronics Multi-/Cross-/Inter-Disciplinary Sequential/Concurrent Product Realization Mechatronics-based Product Realization Mechatronic Design Process

    Ascento - The Two-Wheeled Jumping Robot

    All-terrain capabilities are required to extend beyond flat surfaces the application range of wheeled robots. First think is four or six-legged robots which have been well known for years. Nowadays, thanks to more and more perfect gait algorithms, the two-legged (bipedal) robots appears more and more often. ETH Zürich students combine the advantages of wheeled robot and two-legged robot.

    DIY Low Cost 6-Axis Desktop Robot

    Learning how to build a robot is a long way. It is the way by mechanics, electronics and programming. Such a mechatronics project is associated with problems such as stiffness (mechanics), overvoltage (electronics) or bug (software). Of course, if something is wrong, we always say 'it's not a bug, it's a feature', but finally a robot has to start working properly.

    How 6-Axis Industrial Robots Work

    6-axis industrial robots are commonly used in the manufacturing industry due to their flexibility, powerful programming software, payload capacities ranging from 5kg up to 1000kg and accuracy to 0.1mm or better. Here is a basic breakdown of how a standard 6-axis robot works. The way it rotates, how it is programmed, and the different types of tooling and grippers.

    Mechatronic Systems Applications [e-book pdf]

    Mechatronics is the synergistic blend of mechanics, electronics, and computer science. This book is concerned with applications of mechatronic systems in various fields, like robotics, medical and assistive technology, human-machine interaction, unmanned vehicles, manufacturing, and education.

    How Automated Parking System Works

    An automated car parking system is a mechatronic system designed to transport and park cars automatically. The first semi-automated parking system was used in Paris, France in 1905 at the Garage Rue de Ponthieu (the car was transported to selected level using an internal elevator and the vehicle was parked by attendants). An automated storage and retrieval system for cars is a solution to cities' parking problems, such as the space wasting in a multi-story parking.

    Smart Home Makes Your Life Easier

    Smart homes are also called intelligent, automated or autonomous houses. Nowadays, you can also automate the flats. Dynamic development of automation technology gives you opportunities that were only seen in sci-fi movies in the past. Soon, probably only your imagination will be the limit. What gives us the smart home system?

    Automatic Sorting of Skittles or M&Ms by Colour

    Do you sort M&Ms or Skittles by colour before eating them?  For example, eat all the yellow ones first, then the red ones, then the blue and so on. Brian Egenriether, an electrical engineer, decided to make a small machine that looked like an appliance, which could perform these tasks automatically. This mechatronics project took him about 5 weekends to make. The use of the machine is very simple: pour Skittles or M&Ms into it, push a button and have candies sorted. Let us look at the construction.