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Transcript
Circuits Lab
ENGR 1181
Lab #3
Circuits in the Real World
Many engineering fields and products require the use of circuits. Some are more complicated than
others, but all follow the same basic principles. A handful of applications include electric cars,
biomedical devices, computers, traffic controls, sensors, electronic displays, and cell phones.
Today's Learning Objectives
 After today's class, students will be able to:
• Recognize and assemble series and parallel circuits.
• Construct electric circuits using a breadboard.
• Demonstrate how voltage, current and resistance are
measured.
• Identify and use Ohm’s Law, Power Law, Kirchhoff’s
Current Law and Kirchhoff’s Voltage Law.
• Calculate and measure the equivalent resistance of
electric circuits.
• Employ the proper circuit configuration for a given
scenario.
Digital Multimeter
Connect the red
and black probes to
their appropriate
Digital Multimeter
(DMM) connections
as shown in the
white box:
Turn the DMM
dial to the
DCV setting to
configure it as
a voltmeter
This is the
standard
configuration of
leads.
P. 4
Converting from Schematic to Physical
 Follow the Diagram
Schematic
+5 Volts
+5 Volts
Physical Layout
Current, I
15 Volts
BATTERY
Ground
+5 Volts
R = 5 Ohms
Circuit Schematic
Ground
Ground
Converting from Schematic to Physical
Different physical circuits can correspond to same logical circuit.
An example of the same circuit in a different physical layout:
R2
300
R2
100
Tips for Success
1.
2.
3.
4.
5.
6.
7.
8.
The power strip isn’t on
“Grounding” the circuit (missing or out of place)
LEDs are placed backwards (short lead to ground)
Halves of the boards aren’t being bridged
Wires are missing from the main 5V power source
Misaligning resistors and wires
Not using calculated values for resistances
Not adding a resistor within the LED Circuit
 Never measure CURRENT using the DMM. The current should
always be calculated from measured voltage and resistance values.
Important Takeaways
 Using the principles of Ohm’s and Kirchhoff's
circuit laws as well as the applied
measurement techniques, you should now be
able to calculate and measure resistance and
voltage of any electrical circuit.
Topic
Document Type
Marble Delivery System
None
Quality and Productivity
Executive Summary
Circuits
Executive Summary
Solar Meter
--
Solar Cell
Memo (Combined)
Beam Bending
Memo
Wind Turbine 1
--
Wind Turbine 2
Report (Combined)
Problem Solving Project 1
Problem Solving Project 2
Problem Solving Project 3
Project Notebook
(Combined)