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Electronic Instrumentation Experiment 1 * Part A: Circuit Basics, Equipment, Sound Waves * Part B: Resistors, Circuit Analysis, Voltage Dividers * Part C: Capture/PSpice
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Part A w Circuit Basics w Equipment w Sound Waves
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Automobile Electronics w Previously all mechanical systems have become increasingly electronic w Over the past few years, for example, the automobile has begun to use more computers (microcontrollers) w How many microcontrollers are typically found in a modern automobile?
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Automobile Electronics
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Physical Model for a DC circuit
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Physical Model for Resistance
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Physics vs. Electronics
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Ohm’s Law
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Alternating Current Generators http://micro.magnet.fsu.edu/electromag/java/generator/ac.html
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AC Circuits
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Review of Sinusoids
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General form of the Sinusoid
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DC Source E3631A TOGGLE OUTPUT ON/OFF ADJUST VOLTAGE LEVEL 0 to 6 VOLTSGROUND 0 to 25 VOLTS -25 to 0 VOLTS Do Not Use
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Function Generator 33120A
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Digital Multimeter 34401A
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Oscilloscope 54600B
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Impedance w Definition: a general measure of how a circuit affects the current through it. w Impedance = resistance + reactance w Impedance is used to refer to the behavior of circuits with resistors, capacitors and other components. w In a resistive circuit, impedance=resistance.
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Equipment Impedances w Each measuring device changes the circuit when you use it. w The impedance of the device helps you understand how much. w Device Impedances Function Generator: 50 ohms ‘Scope: 1Meg ohms DMM (DC voltage): 10Meg ohms DMM (AC voltage): 1Meg ohms DMM (DC current): 5 ohms (negligible)
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Effect of Impedance on Circuit
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What to do
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How Ears Work http://members.aol.com/tonyjeffs/text/dia.htm
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Part B w Resistors w Circuit Analysis w Voltage Dividers
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Combining Resistors in Series
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Combining Resistors in Parallel
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Reading Resistors http://www.dannyg.com/javascript/res/resload.htm
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Measuring Voltage
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Voltage Dividers
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More on Voltage Dividers
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Kirchoff’s Laws
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Circuit Analysis (Kirchoff Method)
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Circuit Analysis (Combination Method)
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Protoboards
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Part C w Capture/PSpice Circuit Analysis Software
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Capture
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Simulations
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PSpice
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Cursors
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Adding Traces
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