Post on 02-Jan-2016
College of Engineering
Circuits Lab Introduction
Engineering Education Innovation Center
ENGR 1181
Lab 3 – Alternative Powerpoint (authored by Bruce Trott)
Lab Safety
ENGR 1181
Lab Rules• Closed Toed Shoes• No food or drink• Instructor/TA checking
before testing• Turning off/on Breadboard• Checkout Sheet Signed
P. 3
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 connectingfrom +5V and GroundPosts. 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 :
P. 4
Turn the DMM dial to the DCV setting to configure it as a voltmeter
This is the standard configuration of Leads
Converting from Schematic to Physical
ENGR 1181
Follow the Diagram
+5 Volts+5 Volts
Ground
Physical Layout
Circuit Schematic
+5 Volts
Ground
+5 Volts
Ground
Schematic
P. 6
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.
Circuit Schematic
23
An Equivalent Circuit
P. 7
•Different physical circuits can correspond to same logical circuit•An example of the same circuit in a different physical layout
Do you now understand the concept of metal strips?
Common Problems
ENGR 1181
• Misaligning resistors and wires
• Not using calculated values for resistances
• Not adding a resistor within the LED Circuit
• Miscalculations
• 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.
More Common Problems
Two - Person Teams
ENGR 1181
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.
• ENG 1181
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
Project Notebook (Combined)Problem Solving Project 2
Problem Solving Project 3