Changeset 253 in t29-www for en/miscellaneous.shtm
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- May 22, 2012, 2:13:00 AM (12 years ago)
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en/miscellaneous.shtm
r195 r253 43 43 alt="Picture of the Pianola" width="700" height="618" class="nomargin-bottom" /> 44 44 </div> 45 45 <h3 id="Q1"> technikum29 supports school projects:</h3> 46 47 <p>Microcontrollers revolutionize 48 and influence next to everything. How can schools participate on these 49 developments and perform successful and interesting projects?<br> 50 Six pupils of Q1 (12th year in school) of the Albert-Einstein secondary 51 school were looking for a suitable idea for their so called "project 52 week". This project should be connected to mathematics, physics and/or 53 computer science. This is where the technikum29 got involved. The idea 54 the pupils came up with was to connect technology from the 1950s with 55 modern equipment of 2012. Communication spanning time and technology.<br> 56 <div class="box left"> 57 <img src="/shared/photos/kommunikationstechnik/arduino1.jpg" width="606" height="335" /> 58 </div> 59 <p>Traditionally such projects required knowledge only accessible to 60 computer scientists, engineers and the like. Often they had to spend 61 weeks of reading data sheets, writing cryptic assembly code etc. How 62 things have changed! Since 2009 a cheap and versatile module named 63 "Arduino" is available - a controller based on the well known ATmega 64 328 chip featuring 32 kB of memory. Arduino boards are designed not 65 for the expert but for the layman and are the perfect base for 66 creative people, artists, designers etc. 67 <br> 68 This project focuses on connecting computers to the "real world". The 69 small Arduino board can be programmed to be used as an interface for 70 nearly everything. The pupils decided to connect an early fax machine 71 (a Siemens KF108 made in 1958) to a modern PC. <br> 72 This fax machine is based on a rotating drum which holds the sheet of 73 paper to be transmitted to the receiving station. The picture is 74 scanned in a spiral movement by a photodetector that slowly moves in 75 parallel to the axis of the drum. Of course, this is incompatible with 76 more recent fax machines. 77 78 The Arduino was planned to act as the interface between this historic 79 device and a modern PC. Thus the pupils first had to learn how to 80 program such a micro controller which turned out to be quite difficult 81 for non-programmers. Nevertheless the software approach has its 82 advantages: It is more easily debugged compared with a traditional 83 hardware based interface. Thus it only took a single week to program 84 and interface the Arduino board to the Siemens fax. 85 86 <div class="box left"> 87 <img src="/shared/photos/kommunikationstechnik/arduino2.jpg" width="606" height="354" /> 88 </div> 89 90 <p>The fax machine generates an auido signal with a frequency of 1.5 kHz 91 denoting black pixels to be transmitted. To convert this into a binary 92 signal with a 5V level an amplifier circuit is needed that is followed 93 by an RC-combination. In addition to that a synchronization signal is 94 necessary to signal the start of a new line being scanned. This is 95 generated utilizing a reed-contact that is triggered by a so called 96 "super magnet" that has been glued onto the axis of the scanner drum. 97 The reed-contact thus generates a signal for every revolution of the 98 drum which corresponds to a single line being scanned.<br> 99 100 The control program for the Arduino was developed by the pupils (the 101 source code can be found <a href="/de/lernprojekte/arduino-projekt-programme/"> >>HERE</a>). It allows the picture being scanned, a historic Mickey-Mouse drawing, to be transferred to the PC 102 where it is displayed slowly line by line with good resolution. 103 104 The experiment was a full success and will inspire future projects. 105 106 <p class="small">*) Arduino: The name of this board derives from King "Arduino of 107 Ivrea" who lived in medieval times in northern Italy where the 108 controller was developed.</small> <br> 109 110 111 <h3 id="leander">Art in the Museum</h3> 112 113 <p>The technikum29 motivates activities that get awards and prices. The latest 114 example is that of the young artist Leander A. Schwarzer who transforms 115 everyday things into pieces of art. He has developed pictures made from zippers 116 that can be opened thus giving the viewer the opportunity to modify the picture 117 itself.<br> 118 His latest visit to the technikum29 has inspired him to make art from 119 and with punch cards which were the basis of industrialization in the 20th 120 century. First the "Terzett" (Trio) was created which consists of three punched 121 cards with these irreversible sentences:</p> 122 123 <div class="box left"> 124 <img src="/shared/photos/start/lk.jpg" width="250" height="350" class="nomargin-bottom" /> 125 <p class="Bildtext small">Picture 1: 3 punch cards with text</p></div> 126 127 ANOTHER WORLD IS POSSIBLE<br> 128 IMPOSSIBLE IS NOTHING<br> 129 IMAGINE ALL THE PEOPLE<br> 130 <div class="box right"> 131 <img src="/shared/photos/start/leander.jpg" alt="Leander Schwarzer" width="313" height="239" class="nomargin-bottom" /> 132 <p class="Bildtext small">Picture 2: Leander A. Schwarzer punching cards on an IBM key punch</p> 133 134 </div> 135 136 <p>These cards were hanged on a wall at a distance of 1-2 cm. During the day sun 137 rays create shadows of the punched and coded text on the wall behind the cards. 138 This work of art was awarded a price at the 32th grafics competition in Austria 139 (Innsbruck, 2011). This in turn motivated Mr. Schwarzer to continue his work 140 with punched cards. He spent several days at the technikum29 punching excerpts 141 from Marx' "Capital" thereby creating a pile of several hundred cards. These 142 were shown in the exhibition "A Symbol of Freedom" in Piacenza (Italy). Punched 143 cards transform contemporary slogans into visual paradoxes when they create 144 their unique shadows.</p> 145 <div class="box left"> 146 <img src="/shared/photos/start/lk-musik.jpg" alt="Musik aus Lochkarten" width="336" height="188" class="nomargin-bottom" /> 147 <p class="Bildtext small">Picture 3: Punched cards running through a "musical clock"</p> 148 </div> 149 150 <p>Another work, "Fetish Character of commodities", concatenates the cards 151 containing Marx' text fragments. This string of cards is then pulled through a 152 mechanism like a musical clock that generates sounds controlled by the holes in 153 the cards. So, finally, the "Capital" is transformed into atmospheric sounds.</p><br> 154 155 156 157 46 158 <h3>Movie projector "Dresden 1"</h3> 47 159
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