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Coder Bunnies

Team Name: Coder Bunnies
Team Members: Tim Chernenko, Nathan Callis, Wesley Wardle


Day 1 (First Brainstorm)
  • Pothole screen

  • Makeshift mug holder

  • Plastic bag holder

  • Some kind of long pole to reach farther to get a hold of something

  • Irrigation Pressure

  • Irrigation Filter (For ice?)

  • Hose Filter

  • Kuna Current Problems

Day 2 (Irrigation Filter)
  • "Staircase Filter"
  • Straight Filter
  • Sensors?
  • Coffee Filter Link
Day 3 (Overall Design)
  • Rough Planned Design
  • Coffee Filter Research
  • Entrance Tube Link
  • Cube Connectors Link
  • Steps Tube Link
Day 4 (Refining)
  • Adjusted Measurements of all first prototype pieces
  • Team review over how all the pieces will connect.
Day 5 (First Prototype)
  • Testing the disk filters inside entrance tube
  • The coffee filter tube completely fell apart
  • Measurements are right. Fit perfectly (Just don't stick your finger inside the tube. Fits very snugly.)
  • Can't test as we don't have the cube connectors
  • Team review over how all the pieces come together in the real world.
Day 6 (Testing)
  • Cubes could not hold tubes after print. Sandpaper was required to make the tubes a bit smaller to fit.
  • Note: 3D printer is not exact in measurement from computer
  • Overall first prototype is looking nice.
    • All tubes are in one piece.
    • We discoverd on Day 5 that our first entrance tube was a bit too thin on the bottom. We the applyied a thin strip along the bottom for 3D printing to make it thicker. Though, afterwards, we had pulled it off which ripped the bottom. Creating an even thinner tube!
    • The Cubes fit the tubes very snugly
    • The disk filters for the entrance tube slide in with hardly any sanding.
    • Only problem is that they can't come out
    • Tubes are allowed slide out to take out the trash and other objects that get trapped by the first filter.
    • The Coffee Filter tube is having problems fitting in with the coffee filter also.
    • Blade adjustments like cutting the edge are required in order for it to fit.
  • Test Results
    • Test 1 resulted in fairly clean water. Small particles of dirt could be seen.
    • Test 2: After adding a coffee filter over the entrance tube, much more dirty water could be filtered through and still perform better than Test 1!
    • During both tests some of the water leaked out.
    • Also, not too much water could flow through without over flowing the top entrance.
    • Overall, great progress for the first prototype.
Day 7 (More Testing)
  • Applying electrical tape
  • Testing
    • More dirt came out then the past two tests
    • Though we put in much more dirty water this experiment.
    • This is most likely because of how much dirt had got clogged up in the coffee filter tube.
    • Our solution for this is to have two coffee filter tubes to let the filter hold much more dirt and not clog.
    • Water only leaked in one spot this time... the spot we forgot to tape up.
    • For some unknown reason the water didn't go through nearly as fast at the entrance tube. Though, after poking a hole in this top coffee filter entrance the water could flow at first testing normal speed.
  • Note: Electrical tape makes the coffee filter tubes much harder to get out.
  • To allow the change of adding another tube we created a straight cube connector.
  • Straight Cube Connector Link
Day 8 (Even More Testing)
  • Leakage has decreased a lot despite that only the Entrance tube is covered with tape.
  • Addition of straight connector to decrease the length of the filter.
  • The water strangely is turning yellow after filtration.
    • This is most likely because of the different location we got the dirt from.
Day 9 (Regroup)
  • Research of why the water is turning yellow after filtration.
    • The main reason is because of the decaying plant matter where we got our dirt from on Day 8.
  • During testing much more water leaked. (Box of tears is suggested to be used during testing.)
  • The leak was because of the coffee filters getting so wet on the outside they dripped.
Day 10 (Research and Prototype Edits)
  • Sand is most commonly used at Oil Filtration.
    • These filters have many tubes existing out for certain outputs. One is used to carry out the backwash (or cleaning of the sand), one is to carry out the water after recent cleaning, then the actual tube that carries out the wanted, filtered water/oil.
    • These tubes are used in only certain cycle
    • One special cycle is the agitation cycle which moves the sand around to bring out all the "junk" that got stuck.
    • The backwash cycle than carries the water up to the backwash tube.
    • Next, the re-circulation cycle brings the filter back to speed.
    • Finally, the water goes through like normal and is carried out through the exit tube.
  • Applying hot glue to specific parts of the irrigation filter to prevent leakage.
    • These spots are only on parts that don't need to be taken apart to be cleaned.
    • Also finally fixed the thin bottom of the entrance tube by applying hot glue to prevent leakage.

  • Test Leakage:
    • Leakage!!!
    • Most of the water that was leaking was coming out of the entrance tube after taking of the tape. There was enough room for the water to flow upwards and come out through the open sides.
    • Reapplying tape to entrance tube.
  • Test Leakage 2:
    • Guess what? More leakage!
    • This time the taped entrance tube was not covered on the edges with hot glue. Allowing the water to come out.
    • We discovered that putting a filter next to the steps tube slows down the water greatly.
    • No gravity = No speed
Day 11 (Redesign)
  • Team decision to not use sand after our test. We had put the sand inside the Straight Cube Connector. Though, the sand had created more problems than solved.
  • Reprint of whole prototype for Final.
  • The edits that were made are we raised the hole just one millimeter in the entrance tube, and that we raised the bottom hole in the Cube Connector by one millimeter.
Day 12 (School Presentation Competition)
  • Tested semifinal build before presentation. Works well.
  • Went over briefly how we would present to the teacher.
  • Day after results: We won in our school!
Day 13 (Slideshow Work)
  • Started work on the slideshow
  • Went over as a team what we would want to present
  •  Tim made some edits for our final print
    • The entrance now has a wider funnel for demonstration purposes
    • The steps tube
  • Color choices for each part of the filter
Day 14 (More Slideshow Work)
  • Finished off the presentation as a team.
  • Made some finishing adjustments to our website.
Day 15 (Website and Final Display)
  • Added videos to the website
  • Created the final display for our filter to go inside

Project Choice: Irrigation Filter

Initial (Individual) Prototype Designs/Sketches

First Attempted Tube

Coffee Filter Research
The most common used coffee filter is made out of paper. That specific paper is called crêpe paper. This kind of paper normally has special "holes" so small that only objects 10 to 15 micrometers can 

"Sand" Filter Research
  • Mostly used at Oil Plants
  • Special video explanation included in Journal

Initial (Team) Prototype Design Sketches

Entrance Tube

Cube Connectors

Steps Tube

Coffee Filter Tube

Initial Prototype 3D Print

Our First Design and Test

Testing (Potential User Feedback)

Test with Sand

Leakage Test 1

Leakage Test 2

Prototype Design Edits
  • Applied electrical tape to prevent leakage from Entrance tube
  • Applied hot glue to prevent leakage around tubes
  • Created more opportunities for gravity to speed up the filtration
  • Decreased the thickness of the cube connectors
  • Increased the bottom thickness of the entrance tube (Don't add a rectangle to the bottom it just rips the bottom apart)
  • Speed of the filtration is much faster

Final Prototype Print