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Digital Logic Design (CS302)
Assignment # 04

Total marks = 20

Deadline Date
3rd of February, 2016

Please carefully read the following instructions before attempting assignment.

RULES FOR MARKING
It should be clear that your assignment would not get any credit if:
 The assignment is submitted after the due date.
 The submitted assignment does not open or file is corrupt.
 Strict action will be taken if submitted solution is copied from any other student or from the internet.

You should concern the recommended books to clarify your concepts as handouts are not sufficient.

You are supposed to submit your assignment in .doc or docxformat.
Any other formats like scan images, PDF, zip, rar, ppt and bmp etc will not be accepted.

NOTE

No assignment will be accepted after due date via email in any case (whether it is the case of load shedding or internet malfunctioning etc.). Hence refrain from uploading assignment in the last hour of deadline. It is recommended to upload solution file at least two days before its closing date.

If students find any mistake or confusion in assignment (Question statement), please consult with your instructor before the deadline. After the deadline no queries will be entertained in this regard.

For any query, feel free to email at:
cs302@vu.edu.pk

Question Statement:
In this assignment, students are provided with the design Car Indicator Light Circuit using basic 555 timer IC. We have designed this circuitry using “Electronic Work Bench” (which can be download from VU-LMS download section).

Car Indicator light working mechanism:
When the indicator is triggered, the indicator light will blink for a pre-defined N seconds.

We have used 555 timers in two different states.
• Mono-Stable State
• A-Stable State

Using Mono-Stable 555 timer, after triggering the switch (using Space bar in Electronic Work Bench) will generate 20 seconds UP clock signal.

A-Stable 555 timer is set to generate a clock with duty cycle of 50% of 2 secs (1 sec Clock UP time and 1 sec Clock DOWN time) and will be controlled through Mono-Stable 555 timer output.

By cascading these two 555 timers (Mono-Stable and A-Stable) the output LEDwill blink for 20 seconds (1 sec ON and 1 Sec OFF).

You are required to go through the 555 Data Sheet and Assignment # 04 Electronics Work Bench File (using Electronic Work Bench) and calculate the values for resistors R1, R2 & R3 to generate the specified timing cycles.

555 Mono-Stable Timer
C1 50µF
R1

555 A-Stable Timer
C2 50µF
R2
R3

Note: R1, R2 and R3 are required where we are using capacitors C1 and C2 of 50µF in diagram given above.

Required supporting material:
Electronics Work Bench
555 Data Sheet
Assignment # 04 Electronics Work Bench File

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Replies to This Discussion

Last link not working

Assignment # 04 Electronics Work Bench File

They update link gain. Please Download assignment file again. this file include it assignment file

A.O.A 

Please help me the solved the assignment as me electronic link kasay down load ho ga 

Please share the complete assignment solution 

Assalam-o-Alaikum friends;

koi concept to dain iss assignment k according.
plzz......

let start discussion...

A.O.A 

Y assignment kasay solved ho gi meri tu assignment bi open nai ho rhi hai please help me solution hi send ker do 

dear all.

first of all open zip file.
then install electronics workbench
then read out the pdf files carefully 
and then open the given circuit in electronic work bench.
and find the values of resisters.

here i reconstruct the circuit that is given in the asignment.



Here is circuit file

Attachments:

but how to calculate

this diagram is already have with assignment

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