User:Zblaha2768/enes100/ComboLockPick

NZ< Link to team page.

Give instructor top 3 project choice list
1. Combo Lockpick

2. Tape Purge

3. Robot arm

Write problem statement
Unlocking a combination lock requires one of two things, either the combination or an ability to pick locks. This ability is not easy to learn, however, so a device that will be able unlock a combination lock could be substituted. The objective of this project is to make a device that can pick a combination lock.

Assign Task1
Research potential designs/ existing combolockpicks.

Compare actual work done to Task1
Spent more time looking over the lock/ taking it apart rather than research.

Week1 Narrative
I took apart the lock to see how it might function. Unfortunately, taking apart actually broke it, so little discovery was made. Tuesday was spent taking the lock apart, and Thursday was spent planning our next move.

Specifics on the parts:

The dial (pried off with a screwdriver)

A pin (kept system together, internals fell apart after it was removed)

3 colored discs (likely how the mechanism recognizes the combination)

A spring (probably meant for some form of mechanism, lock unlocked after this was removed)

There was a metal shield that prevented any real observation or tinkering with the internals. There was a small hole in this shield where the pin was, and so the hole was pried wider with a screwdriver. Not much wider, there were many other components that would not fit out of this hole.

Week1 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and a signature ~ by entering four tildes in a row to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task2
Research and develop a mechanical system to open a combination lock.

Compare actual work done to Task2
Spent more time on research than development.

Week2 Narrative
Found an infographic (here[]) that shows how to solve a master lock easier than normal (100 possibilities rather than 64,000). Tested this process and it seem to work:

1. Pull up on latch, and twist dial. Lock dial should lock up on 12 numbers, record these.

2. Of those 12 numbers, 7 should lock up between numbers (for instance, 7.5 to 8.5) disregard these numbers.

3. Of the remaining 5, 4 should have the same number in the ones place (for instance, 2, 12, 22, and 32) disregard these.

4. The remaining number should be the final number in the combination, match this in the matrices in the infographic (click the link if the picture is not present), where the third row of each matrix is the third number in the series.

5. Try combinations using the first two rows in a matrix.

The matrices:

0-4-8-12-16-20-24-28-32-36

0-6-10-14-18-22-26-30-34-38

0-4-8-12-16-20-24-28-32-36

1-5-9-13-17-21-25-29-33-37

1-7-11-15-19-23-27-31-35-39

1-5-9-13-17-21-25-29-33-37

2-6-10-14-18-22-26-30-24-38

0-2-8-12-16-20-24-28-32-36

2-6-10-14-18-22-26-30-24-38

3-7-11-15-19-23-27-31-35-39

1-3-9-13-17-21-25-29-33-37

3-7-11-15-19-23-27-31-35-39

Week2 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and a signature ~ by entering four tildes in a row to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task3
Work on the design of the mechanical portion of the lockpick.

Compare actual work done to Task3
Spent time putting together the motor components, did not do anything with mounting a solenoid.

Week3 Narrative
Tested a few motors, selected the one that was most like the youtube video's motor. Drilled a hole in the connector piece to fit on the motor's shaft, and put together the entire system:

12 volt power source

2 arduinos, stacked

Stepper motor

Connector piece

Lock

Lock was successfully spun by the stepper motor, at various speeds and step frequency (time between steps) which was controlled by the arduinos, which was programmed to use the default stepper example. Also tested out a solenoid briefly, though it did not seem to have the pulling power to open the lock latch (when unlocked).

 File:MechanicalComboLockPick.jpg|The system 

Week3 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and a signature ~ by entering four tildes in a row to create a time and date stamp. Create a new category if another team mate has already commented here.

Assign Task4
Start work on the solenoid, maybe work on a lock clamp (to keep it in place) if time permits.

Compare actual work done to Task4
Did not work on solenoid, instead worked on mounting system and last minute testing.

Week4 Narrative
Spent most of my time working on a mounting system for the motor/ locking mechanism. A picture of this (and the rest of the system) can be found above. The stepper motor is mounted on a piece of wood by way of a pull tie. This wood has a small, 3mm notch so that the pull tie would not slip. Some testing of this system was done, and it worked just as well as previous tests, spinning the dial left and right at various speeds and frequency of steps.

Week4 Peer Review
Go to each team mates weekly summary wiki page. Read their activities and narrative. Then go the associated discussion page. Say something positive on this page. Try some constructive criticism. Add your name and a signature ~ by entering four tildes in a row to create a time and date stamp. Create a new category if another team mate has already commented here.

Complete Project Page
Follow the "project done" format.