User:Gharris/ENES100/KnockKnock

Write problem/project Goal
The goal of this project is to open a door with a certain number of of knocks will unlock the door with the stock door handle

My First Task
My task for the first week is to reverse engineer the door knob to figure out how it works and and how to modify it

Summary of actual work over first weekend
''Over this first week I worked on dismantling and and reverse engineering the the stock door knob. At first my plan was to get the voltage and amperage, running to the door lock, by taking the middle hinge off the door and taking the wires that run through them and reading them with a volt meter. I planned to put sewing pins through the wires to read the voltage going to the door. I did this so I did not have to strip the wires. So when I first unscrewed the 4 screws holding the middle hinge to the door I discovered a bundle of wires but only two of the wires where connected. I probed these wires and found the voltage the door was receiving when it was unlocked was 24.7 volts. But then not wanting to cut the wires to find the current, I decided to take apart the whole lock to see if there was an easier place to probe so i started with the face plate which was held in by 2 small screws. once I removed that i found two more larger screws holding in the underlying structure of the lock to the door. after removing those i found the lock still stuck in place. I decided to take off the door handles now to see if that will release the locking mechanism so i found the interior handle had a small hole with as Alan screw in it. Once I unscrewed it the interior handle pulled of the reveal a rectangular piece of brass under it with a black piece of metal with a loop on top. I then unscrewed the black piece of metal out of the brass rectangle. With this the other door knob should come off. This did not release the locking mechanism either. The next thing i removed was the dead bolt I was stumped for a while on how to go about removing it. So i looked on online to try to find the solution but that didn't yield any results so i decided to play around with it to see if i could undo it. So I eventual found a very long screw on the interior of the locking mechanism i unscrewed this and then the dead blot was able to unscrew like a screw one of my group members helped to unscrew it by placing a screwdriver into the lock and spinning it. With this the locking mechanism would still not yield to i decided to take the small decorative brackets that were around where the handles went and on the interior side there was two screw under it. Once i unscrewed these two screws the locking mechanism slid out of the door and it was connected by a male female plastic connector and once i removed it the mechanism had the required voltage and amperage written on the side at 25 volts and .33amps but i decided to test what voltages and currents it really needed so i brought it over to a desktop power supply and found it first activates at 17.2volts at .178 Amps and holds the lock until 4.6volts at .043 Amps   ''

Week1 Narrative
''Over this first week I worked on dismantling and and reverse engineering the the stock door knob. At first my plan was to get the voltage and amperage, running to the door lock, by taking the middle hinge off the door and taking the wires that run through them and reading them with a volt meter. I planned to put sewing pins through the wires to read the voltage going to the door. I did this so I did not have to strip the wires. So when I first unscrewed the 4 screws holding the middle hinge to the door I discovered a bundle of wires but only two of the wires where connected. I probed these wires and found the voltage the door was receiving when it was unlocked was 24.7 volts. But then not wanting to cut the wires to find the current, I decided to take apart the whole lock to see if there was an easier place to probe so i started with the face plate which was held in by 2 small screws. once I removed that i found two more larger screws holding in the underlying structure of the lock to the door. after removing those i found the lock still stuck in place. I decided to take off the door handles now to see if that will release the locking mechanism so i found the interior handle had a small hole with as Alan screw in it. Once I unscrewed it the interior handle pulled of the reveal a rectangular piece of brass under it with a black piece of metal with a loop on top. I then unscrewed the black piece of metal out of the brass rectangle. With this the other door knob should come off. This did not release the locking mechanism either. The next thing i removed was the dead bolt I was stumped for a while on how to go about removing it. So i looked on online to try to find the solution but that didn't yield any results so i decided to play around with it to see if i could undo it. So I eventual found a very long screw on the interior of the locking mechanism i unscrewed this and then the dead blot was able to unscrew like a screw one of my group members helped to unscrew it by placing a screwdriver into the lock and spinning it. With this the locking mechanism would still not yield to i decided to take the small decorative brackets that were around where the handles went and on the interior side there was two screw under it. Once i unscrewed these two screws the locking mechanism slid out of the door and it was connected by a male female plastic connector and once i removed it the mechanism had the required voltage and amperage written on the side at 25 volts and .33amps but i decided to test what voltages and currents it really needed so i brought it over to a desktop power supply and found it first activates at 17.2volts at .178 Amps and holds the lock until 4.6volts at .043 Amps''

My Second Task
My task is to Design build and test a Boost converter Circuit so the Aduino can open and close the lock

Summary of actual work over second weekend
''This week I was supposed t work on a circuit that could power a relay to open the door. But we found out we could not modify the door''

Week2 Narrative
''I started out by designing a circuit that would amplify the initial pulse from the arduino to actually move the cylinder in the lock its self. But after later recommendation by an electronics expert I decided to use a relay to connect an external power supply to open the lock cylinder. So then I hunted through the back room for a relay and after I found one. I took it to the desk top power supply and found the voltage needed to trigger the relay, the voltage needed was 7.8 volts but held to 3.4 volts. I realized that i then needed a way to increase the power of the initial pulse form the arduino so it could trigger the relay and allow the standard 5 volt power from it to hold it closed.I designed a circuit that uses a low level capacitor to give the initial opening pulse. As I began to test the circuit with little success I was told that we could not alter the handle in any way and this solution to opening the door was no longer viable. ''

My Third task
Record what you are planning on doing for the team during the third weekend.

Summary of actual work over third weekend
I was tasked to build a device to open the door handle using the mechanical advantage of gears and told not to use string.

Week3 Narrative
''I started by doodling in my note book and I had five possible design. All of them Included complex gearing systems that I would either need to create myself with a file or print it off the printer Bot, unfortunately it is not currently working so I needed to find gears. So I walked into the work shop, And some one showed me a gear system for a laser printer. After playing with it for a while I discovered That it had quite the amount of mechanical advantage from the large gears. and after putting wights on the door I discovered that It took around 19.6 newtons to turn the handle of the door. We then decided to attach it the the door using Command strips. ''

My Fourth task
''Find away to successfully attach the gear system to the handle. ''

Summary of actual work over fourth weekend
How is what you did different than what you planned?

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).