513
edits
No edit summary |
No edit summary |
||
(36 intermediate revisions by the same user not shown) | |||
Line 1: | Line 1: | ||
<br> | <br> | ||
== The Improbable Switch == | |||
<br> | |||
[[File:MazeModule.jpg]]<br> | [[File:MazeModule.jpg]]<br><br> | ||
''The Improbable Switch'', maze module | ''The Improbable Switch'', maze module | ||
Line 20: | Line 22: | ||
For a restart both balls need to be removed and the reset-button on the circuit board is to be pushed.<br> | For a restart both balls need to be removed and the reset-button on the circuit board is to be pushed.<br> | ||
<br> | |||
== Work in | WORK IN PROGRESS<br><br> | ||
[[File:GridSketch.jpg]]<br><br> | |||
Sketch for the frame of the maze (10 cm x 10 cm).<br> | |||
Each corridor should have a width of at least 1 cm. <br><br><br> | |||
[[File:GridSketch1.jpg]]<br><br> | |||
Final sketch for the two dimesnional structure of the maze.<br> | |||
Defining pins for connecting the „on“ / „off“ circuit.<br><br><br> | |||
[[File:underneath.jpg]]<br><br> | |||
Setting up the switch structure with wire and tape.<br> | |||
Adding a connection for the „hell“ - circuit (red).<br><br><br> | |||
[[File:paperwalls.jpg]]<br><br> | |||
Building the three dimensional wall structure of the maze.<br> | |||
The paper walls are jammed into the sliced Kappafix.<br><br><br> | |||
[[File:MazeSchematic.jpg]]<br><br> | |||
Schematic for the electronics with four 555 Timers:<br> | |||
- monostable mode (trigger) for „on“ and „off“<br> | |||
- astable mode for heart beat sound<br> | |||
- monostable mode (trigger) for „hell“ sound<br> | |||
- astable mode for „hell“ sound (using the same speaker)<br><br><br> | |||
[[File:MazeBoard.jpg]]<br><br> | |||
Circuit borad with reset switch.<br><br> | |||
<br> | |||
RESULT<br><br> | |||
[[File:MazeSetup.jpg]]<br><br><br> | |||
<br> | |||
== Variable Resistance == | |||
<br> | |||
[[File:SchwammCloseup.jpg]]<br><br> | |||
''Variable Resistance'', modified chalk board | |||
The biggest challenge of Variable Resistance was to find materials that are flexible in terms of the current flowing though them. <br> | |||
We tested things by including them into the circuit of a 555 timers astable mode.<br> | |||
After trying out things that I carried to the classroom I had the idea to connect something to the circuit that was already there.<br> | |||
The chalk board was a good example: by connecting a humid rag (to pin 6) and a piece of wet aluminium foil sticking to the board (to pin 7) I could draw sounds by wiping the surface.<br> | |||
Thereby I found out that it is very important to „calibrate“ the used material: a very high and still hearable tone should sound when the rag is put directly onto the aluminium connector.<br> | |||
By moving the rag further away, the tone will become deeper and deeper (as the resistance rises).<br> | |||
This tone range can be adjusted by turning a potentiometer (between pin 7 and 8) and by trying out different capacitors (between pin 1 and 2).<br> | |||
<br> | |||
WORK IN PROGRESS<br><br> | |||
[[File:BycicleTyre.jpg]]<br><br> | |||
Trying out a bicycle tire filled with water and wire as a variable resistor for a 555 Timer astable mode. | |||
<br>(failed)<br><br><br> | |||
[[File:OnTop.jpg]]<br><br> | |||
Circuit board with 555 Timer astable mode and speaker on top of the chalk board..<br><br><br> | |||
[[File:AluFoilFirst.jpg]]<br><br> | |||
Connecting one side of the resistor to the chalk board via aluminium foil. <br> | |||
The foil sticks automatically to the wet spots on the board. <br> | |||
A sponge was used to draw temporary traces that conduct electricity and therefore<br> can function as parts of the resistor.<br><br><br> | |||
[[File:AluModules.jpg]]<br><br> | |||
Squares and rectangles of aluminium foil with parallels to different electrical parts.<br> | |||
They can be included in the chalk board circuit.<br><br><br> | |||
[[File:TestingAlu.jpg]]<br><br> | |||
Testing aluminium parts in the circuit.<br><br> | |||
<br><br> | |||
RESULT<br><br> | |||
[[File:ChalkBoard.jpg]]<br><br> | |||
[https://www.dropbox.com/s/oxo8mfdqxbg4c8j/Tafel.mp4?dl=0 Video]<br><br><br> | |||
<br> | |||
== Final Work: The Reexperiventer == | |||
<br> | |||
[[File:ReexSketch.jpg]]<br> | |||
''Reexperiventer'', Sketch | |||
Manual:<br> | |||
1. Select an image you want to reexperivent (online, in a book, in a magazine, …) | |||
2. Print it out (7 cm width max.) and put it underneath the tip of the pen so that it is located at the pictures center. | |||
3. Cover the image with a sheet of transparent paper. | |||
4. If you chose a totalitarian, evil, dangerous or seemingly untouchable image: put on rubber gloves. | |||
5. Check out the switches and their effects on the movement of the device. | |||
6. Rotate the device to the starting position. Move down the pen until it touches the paper. | |||
7. Take a deep breath and start drawing. Only draw with maximum awareness and get yourself into every single movement. | |||
8. Rotate the device to the very right or left once you finished reexperiventing. | |||
9. Enjoy the result and be anxious to extend your repertory of reexperiventions! | |||
<br> | |||
WORK IN PROGRESS<br><br> | |||
[[File:FirstPrinter.jpg]]<br><br> | |||
Salvaged printer parts:<br> | |||
A metal case, rails, transport systems for paper and printer head, two DC motors <br> | |||
and light gate for control of motor movement.<br><br><br> | |||
[[File:HbridgeSwitches.jpg]]<br><br> | |||
Experimenting with two switches (H-bridge) for the horizontal | |||
movement of the DC motor.<br><br><br> | |||
[[File:PrinterVid.jpg]]<br><br> | |||
The printer as a drawer.<br> Manual control of the movements with switches and H - bridge ([https://www.dropbox.com/s/nbz7t6lydwsvzqk/IMG_2015.MOV?dl=0 Video])<br><br><br> | |||
[[File:Reexsketch.jpg]]<br><br> | |||
Idea: A movable „arm“ that allows going back, forth, left and right (movement in x and y direction) <br>with a changeable „nose“.<br> Make the printers inner movements visible outside of the casing.<br><br><br> | |||
[[File:cutting1.jpg]]<br><br> | |||
Cutting the „arm“ pieces out of Kappafix (accessible, easy to work with, strong enaugh and flexible<br> at the same time).<br> Gluing them together (sandwiching) for a better stability. <br><br><br> | |||
[[File:cutting2.jpg]]<br><br> | |||
The upper arm needs a „Slider“ - Something that is glued to one part of the arm holding the other <br>(movable) part of it in place. <br> It is important that the „Slider“ is not too tight nor too lose. <br> It should not be too hard to push the flexible part in and it should not have too much space to the <br>left and right at the same time. <br><br><br> | |||
[[File:cutting3.jpg]]<br><br> | |||
The „Slider“ made of papercard glued to the longer side of the upper arm.<br><br><br> | |||
[[File:ReexWheel1.jpg]]<br><br> | |||
The lower (static) arm did not move back and forth - the pressure from the wheels of the printer <br>was too low.<br> Another single wheel had to be installed that allows the back wheels to apply more pressure on the arm.<br> The same thing has been done in the front later on.<br><br><br> | |||
[[File:3erWheel.jpg]]<br><br> | |||
How can the „joint“ of the two arms move to any x/y direction?<br> It needs wheels that are like rolling spheres.<br> This prblem has been solved with wheels from the hardware store:<br> they contain axle bearings that allow them to circle around their own case. <br>Three of these wheels are enough for a stable platform.<br><br><br> | |||
[[File:ReexAllParts.jpg]]<br><br> | |||
Bringing the parts together with a threaded rod and nuts. <br><br><br> | |||
[[File:ReexCallibration.jpg]]<br><br> | |||
Defining the reachable area by pushing the arms to their maximum position.<br><br><br> | |||
[[File:ReexPWM.jpg]]<br><br> | |||
The PWM Schematic for controlling the speed of the DC motors.<br><br><br> | |||
[[File:ReexPWMcase.jpg]]<br><br> | |||
The PWM module in its case with a knob to control the motor speed and a connector for a <br>9V DC power supply that works with 220V AC from a common power plug.<br><br><br> | |||
[[File:ReexHbridge.jpg]]<br><br> | |||
H-Bridges for spinning each<br> DC-motor back and forth.<br><br><br> | |||
[[File:ReexHbridgeCase.jpg]]<br><br> | |||
The „Game Pad“ in a Kappafix case. <br><br><br> | |||
[[File:ReexWired.jpg]]<br><br> | |||
Everything brought together and wired up. <br><br><br> | |||
[[File:Reexfirst.jpg]]<br><br> | |||
The first drawing..<br><br><br> | |||
[[File:ReexSelfie.jpg]]<br><br> | |||
„Self Portrait“ with and without additional stabilisation.<br><br><br> | |||
[[File:ReexSelfieMe.jpg]]<br><br> | |||
„Self Portrait“ # 2<br><br><br> | |||
<br> | |||
RESULT<br><br> | |||
[[File:ReexVideo.jpg]]<br><br> | |||
[https://vimeo.com/1490575676 Video] | |||
<br><br> | |||
<br> |
edits