ECET230_ilab procedure

Laboratory Report Cover Sheet DeVry University College of Engineering and Information Sciences

Course Number: ECET-230

Professor:

Laboratory Number: 2

Laboratory Title: Decoders and Multiplexers

Submittal Date: Click here to enter a date.

Objectives:

Results:

Conclusions:

Team:
	Name		Program		Signature
	Name		Program		Signature
	Name		Program		Signature

Observations/Measurements:

IV. A.4. Output with Data Select LOW:

Display =

IV. A.5. Output with Data Select LOW:

Display =

Questions:

1. Why are the 330 Ω resistors required for the discrete logic circuit, but not for the MultiSim simulated circuit or the eSOC III circuit?

2. Create a partial truth table showing the requirements for a seven-segment decoder to output a hexadecimal digit. This requires four input bits and six output states, A – F. For each output state, show the segments a-g. The output states for the inputs 0 – 9 are the same as for the 74LS47 (see focus.ti.com). Use capital letters A, C, E, F and lower case for b and d.

3. Why is the seven-segment display driven with an active-LOW signal using discrete logic and an active-HIGH with the eSOC board?

Grade:

Deliverable	Points Available	Points Achieved
Laboratory Cover Sheet	8
Working Circuit(s)/Program(s)	8
Observations/Measurements	6
Questions	8
Total Points	30
Comments:

Course Number: ECET-230 Laboratory Number: 2 Page 3 of 3