http://dap.cooper.edu/ 2026-05-05T14:40:43-04:00 http://dap.cooper.edu/ http://dap.cooper.edu/lib/images/favicon.ico text/html 2013-05-16T14:20:01-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:ece_150_dld&rev=1368728401&do=diff DLD Midterm project: The Maze of Life! The word below is the Hebrew word for life Chai. In my DLD project, I decided to build a maze out of the word life. The circuit is consists of a 4 bit sate machine with 5 inputs, up, down, left, right, and an atstable obstacle timer; the board (the LED matrix) has 16 squares to walk on, which correspond to the 16 possible addresses produced by the state machine. Since eight bits constitute a large amount of logic to simplify, 4 bit multiplexers were constr… text/html 2013-04-28T21:40:08-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:eid101&rev=1367199608&do=diff d text/html 2013-05-16T14:19:24-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:eid101_and_cs102&rev=1368728364&do=diff EID101: Building Blocks The Hexagonal Building Block The block held 300 pounds, reaching its presecribed/predicted force limit. This is proportional to 240,000lb if the block would be made out of steel to its intended dimensions, a hexagon of 4 foot radius. text/html 2013-05-16T14:18:35-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:eid103&rev=1368728315&do=diff Welcome to the class history of EID 103. Here are the projects worked on in this class. Enjoy! Mycrophone: The King of all Projects ............................................................................................................................................................................... text/html 2013-07-10T10:29:29-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:hydroelectric_projects&rev=1373466569&do=diff This was a working Pelton hydroelectric generator for cell phones (2.5 V peak) by rotating an HP laserjet three phase stepper motor. Below is a new design of the hydroelectric pipe generator that I am presently working on. It will be a reaction (not an impulse) driven generator. text/html 2013-05-16T14:20:38-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:old_school_work&rev=1368728438&do=diff Oooooo, a partly finished M4 Sherman tank! This summer, I plan on adding the wheels and supension. This is what I call solid modeling. Oooooo, an alarm clock. For this project, I had to reverse engineer a quartz alarm clock, draw by hand every part into a notebook, and CAD each part to make the model below. text/html 2013-05-16T14:19:43-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:robot_arm_rumble&rev=1368728383&do=diff Robot Arm Rumble Below is a robot arm that I did build in my senior high school year for the Science Olympiad. It was so functional but yet so unorthodox that I was not permitted to compete. The arm used polar coordinates to reach a maximum radius of up to 4 feet. text/html 2013-05-16T14:20:17-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:super_scary_project&rev=1368728417&do=diff This is the craziest, the most dangerous, and also the least successful project I ever did. It was supposed to be a single disk dynamo. It is basically a super fast rotating copper disc that was supposed to generate and maintain its own magnetic field; but my motor was simply not powerful enough. It did generate 0.3-0.5 volts though. text/html 2013-05-16T14:21:00-04:00 http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:david_shekhtman:the_wrights_take_to_the_sky_balsa_wood_airplane&rev=1368728460&do=diff This is one of my best experineces in engineering. This an airplane that I built in my junior high school year. I designed it from scratch on CAD using smaller Balsa wood models and a model airplane book. Every piece was laser cut to obtain the most workable tolerance and precision, especially since there were many repeated parts, quality control was key. Only the nose of the plane was hand-carved and eyeballed into place. On June 6, the plane flew for over 300ft before the undercharged batteri…