Lesson 7: Relay Based Multiplexer
Goal:
Students will learn how to assemble and test a relay based multiplexer.
Objectives:
By building and testing a relay based multiplexer, students will understand its operation
and function.
Prerequisite:
Lesson 6: Switches and Relays
Materials:
D1
InputA
InputB
LED1
LED2
Output
R1
R2
R3
R4
R5
R6
R7
R8
RL1
SW1
SW2
Handouts – printouts of PowerPoint slides
Equipment:



Computer with Microsoft PowerPoint
Overhead projector
Module E PowerPoint file
©2010 AKULA LLC, Jeremy R.Hertzberg, BS CMPE
Lesson Description:
Students will assemble and test a relay based multiplexer.
Lesson Procedure:
Introduction:
Now that we’ve learned about switches, relays and multiplexers, we’re going to
build a relay MUX.
Main Activity:
Using the board from Module C, students will assemble the relay MUX:
1.
2.
3.
4.
5.
6.
Jump LSB boards SW2->LSB+1 SW1
Jump Outputs of ones place to inputs of 2s place
Jump Outputs of twos place to inputs of fours place
Attach 3 Switches to indicate binary numbers
Attach power
Test system
Closure/Conclusion:
Follow up lessons/Activities:
None, end of unit.
Assessment/evaluation:
Does MUX work?
Activities 1 & 2 (PP slides 10 & 11)
©2010 AKULA LLC, Jeremy R.Hertzberg, BS CMPE