Lab 1 Breadboard and Measurement Techniques
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Transcript of Lab 1 Breadboard and Measurement Techniques
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Lab 1 Breadboard and Measurement Techniques
Tom Rebold
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Calculate the current in this circuit using Ohm’s Law
3
6VI
R
VI
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Ohm’s Law, Including Power
Reproduced by permission of Tony van Roon, 2002 http://www.uoguelph.ca/~antoon
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How Many Watts dissipated by Resistor?
2A
300
P=I2R
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Series Circuits One current path, therefore the
current is the same everywhere
Total resistance is the sum of the individual resistances
...21 RRRT
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VOLTAGE DIVIDER
I
21
212
22
21
1
RR
RVV
IRV
RR
VI
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Calculate RT and the current in this circuit, and v1
4 8
6Vv1
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Parallel Circuits More than one current path
Total current is the sum of the individual currents
...21 IIIT
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Parallel Circuits (2)
valuesametheifn
R
onlyifRR
RRRRR
RT
(
)2(
...111
1
21
21
321
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Calculate RT and the current in each branch of this circuit
6 3 6V
i1 i2
IT
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Calculate RT and the current in each branch of this circuit
3
6V 6 6
i1 i2
IT
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Lab--The Breadboard
Vin (6 V)
Vss (Ground)
Each row isConnected
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Lab--A Simple Circuit
Vin (6 V)
Vss (Ground)
Each row isConnected
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Wire the following parallel circuit on the breadboard
6 3 6V
i1 i2
IT
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The Parallel circuit from previous
Vin (6 V)
Vss (Ground)
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A Series Circuit
Vin (6 V)
Vss (Ground)
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Lab--Measure Volts in Parallel
Because the voltmeter is placed in parallel with the circuit element, you do not need to physically alter your circuit in order to measure voltage.
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Measure Voltage in Parallel
Vin (6 V)
Vss (Ground)
V
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Measure Current in Series
You must physically modify your circuit:1.Create a gap in the segment where you want to measure current. 2. Reconnect the gap using your ammeter as a jumper wire
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Measure Current in Series
Vin (6 V)
Vss (Ground)
A
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Caution!!!
If you measure Ampsin parallel, you candamage the meter
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Measure Resistance out of circuit
Select the ohms mode, remove the resistor to be measured from your circuit, and place the ohmmeter leads across the resistor leads. It is not OK to use your fingers to do this (your body resistance will change result!)
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Web References
Learn Electronics Tutorials and Information Pages
http://www.twysted-pair.com/ Electronics Tutorials
http://www.electronics-tutorials.com/ Tutorials for Learning about Electronics
http://www.iguanalabs.com/maintut.htm AC Electricity and Electronics
http://www.sweethaven.com/acee/default.htm
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Web References
Jones on Stepper Motors http://www.cs.uiowa.edu/~jones/step/
Holt Software http://www.holtsoft.com/ Turing, Computer Engineering textbooks
Tony’s Website http://www.uoguelph.ca/~antoon/ Many excellent tutorials, example
circuits