6 002 Demo 01 Load set up Demo 01 set stored in scope i v characteristic of various components Agarwal Fall 00 Lecture 1 Purpose This demonstration shows the i v characteristics of several components showing both ideal behavior and real limitations It has been used in the context of an introduction to circuit theory with particular emphasis on the abstractions made to result in linear lumped circuits Simple i v characteristics of a variety of components that respond to electrical stimuli non electrical stimuli or that produce interesting non electrical behavior light smoke are shown The goal is to display to the student the abstractions made for simplicity of analysis what those abstractions ignore and when they can break down For fun a high voltage is also applied across a pickled cucumber it begins to glow and emit a distinctive stink to show that components can be modeled as lumped elements in so far as their i v characteristics are concerned All other behavior interesting or otherwise is not modeled Also for fun a high voltage is applied across a small resistor the resistor sputters and blows up with an audible crack This to show that in practical systems abstractions only go so far The simple R model for example does not model power dissipation limits Description Lumped abstraction relationship to physics KVL KCL CONNECT EXT1 BLE to INPUT OF THE BOX EXT2 RED to OUTPUT OF THE BOX Using 1 K Resistor For NEG RESISTANCE Set switch to Neg Resistor Bulb For BULB Set switch to Bulb and change the output resistor to 50 Ohm Change freq to 1 Hz on FG1 and go to File Load Setup click on 1A Note Also we have for the first class the Burning Cucumber and also the Burning Resistors Use resistors in parallel for more actions See schematic on the next page for more detail Note Current is on the Vertical X and Voltage is on the Horizontal X Oscilloscope Setup CH V DIV OFFSET MODE FUNC MATH VERTICAL off CH4 1k 2 off off CH1 CH4 3 off on F1 vs F2 1 off 4 off Horizontal 2 0 2 0 2m DC DC 2m 0 HORIZONTAL 2 0 off Acquisition AUTO AUTO 4 Trigger CH1 Cite as Anant Agarwal and Jeffrey Lang course materials for 6 002 Circuits and Electronics Spring 2007 MIT OpenCourseWare http ocw mit edu Massachusetts Institute of Technology Downloaded on DD Month YYYY Waveform Generator Setup UNIT Fg1 On WAVE SIN AMP 10 Power Supply Setup OFFSET 0 FREQ 6 25 100 25 OUTPUT off Trigger INT Cite as Anant Agarwal and Jeffrey Lang course materials for 6 002 Circuits and Electronics Spring 2007 MIT OpenCourseWare http ocw mit edu Massachusetts Institute of Technology Downloaded on DD Month YYYY
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