ENGR 1181
Circuits Lab Introduction
Lab 3 – Alternative Powerpoint (authored by Bruce Trott)
Engineering Education Innovation Center
College of Engineering
ENGR 1181
Lab Safety
Lab Rules
• Closed Toed Shoes
• No food or drink
• Instructor/TA checking
before testing
• Turning off/on Breadboard
• Checkout Sheet Signed
Task 1: Basic Setup (Step 1)
• Connect 5V power supply to the toggle switch box by plugging in the
black wire
• Next connect the red and black wires originating from the bread board
sockets to their appropriate positions as shown:
5 V power
supply
Notice Red and Black
wires connecting
from +5V and Ground
Posts. Make sure metal
part of wires are
touching metal posts.
Task 1: Basic Setup (Step 2)
• Connect the red and black probes to their appropriate Digital Multimeter (DMM)
connections as shown in the figure below :
Turn the DMM
dial to the DCV
setting to
configure it as a
voltmeter
This is the
standard
configuration of
Leads
P. 4
ENGR 1181
Converting from Schematic to Physical
Follow the Diagram
Schematic
Physical Layout
+5 Volts
+5 Volts
+5
Volts
+5 Volts
Ground
Ground
Circuit Schematic
Ground
Task 3: Series Circuit, (Step 1)
• Toggle off power to board.
• Place the nominally valued 200 and 300 Ohm resistors on the
Breadboard, as shown in the schematic (left) and in the picture (right).
NOTE: Vertical location of resistors is critical.
3
2
Circuit Schematic
An Equivalent Circuit
Do you now
•Different physical circuits can correspond to same logical
understand the
concept of metal
circuit
•An example of the same circuit in a different physicalstrips?
layout
P. 7
ENGR 1181
Common Problems
• Misaligning resistors and
wires
• Not using calculated
values for resistances
• Not adding a resistor
within the LED Circuit
• Miscalculations
More Common Problems
• The power strip isn’t on
• Ground the circuit
• 3) LED are placed backwards (Short lead to ground)
• 4) Halves of the boards aren’t being bridged
• 5) Wires are missing from the main 5V power source
*Never measure CURRENT using the DMM. The current
should always be calculated from measured voltage and
resistance values.
ENGR 1181
Two - Person Teams
Perform this lab in teams of 2 people.
If there are only 3 people, all can work
together.
Record results in provided calculation sheet
and perform calculations.
•
Topic
Document Type
Marble Delivery System
None
Quality and Productivity
Executive Summary
CIRCUITS
EXECUITIVE SUMMARY
Solar Meter
--
Solar Cell
Memo (Combined)
Quality & Productivity
Memo
Wind Turbine 1
--
Wind Turbine 2
Report (Combined)
Problem Solving Project 1
Problem Solving Project 2
Problem Solving Project 3
Project Notebook
(Combined)
ENG 1181