Maybe just pont me in the right direction would also help i am completely lost on this.
Thanks.
Need help with homework
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11th April 2012 04:41 PM #105gpgt2
Need help with homework
I need help designing a gate function generator for a lab experiment and am having problems doing so is there somewhere i can look for an example or one that is already done?This is the problem i am trying to solve.
implement a chip function detector that is able to
detect if the tested chip has the function of NAND (7400), OR(7432), AND(7408) or
XOR (7486) gates.
I can either wire it on a breadboard with some ics or i can use the PLD quartus 2 that we have available.
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11th April 2012 05:22 PM Thread Starter #205gpgt2
0
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11th April 2012 05:47 PM #3ericgibbs
Super Moderatorhi,
Originally Posted by 05gpgt2
The first thing you should do is work out the Truth table for each of those gates.
They all have two inputs and one output.
Call the inputs A and B, the output X [ or C of you prefer]
The OR gate is easy.
A B X
0 0 0
1 0 1
0 1 1
1 1 1
You do the others yourself and post your tables, we will give more Hints.0Last edited by ericgibbs; 11th April 2012 at 05:47 PM.
Eric " Good enough is Perfect "
I will NOT answer PM's requesting technical help, please use the Forum
"Nigels Asm tutorials:" www.winpicprog.co.uk/
"Ian Rogers 'C' conversion of Nigels Asm tutorials:" http://www.electro-tech-online.com/c...torials-c.html
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11th April 2012 07:26 PM #4Grossel
Are you allowed to use µpc or other programmable devices, or are you strictly bounded to logic gates, counters, flipflops and so on?
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12th April 2012 01:22 AM #5audioguru
74xx series logic ICs are extremely old. I first learned about DTL logic when RTL logic ICs became obsolete.
I threw away my TTL cookbook about 32 years ago and have used Cmos logic ICs ever since.
Why don't teachers use newer Cmos?0Uncle $crooge
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12th April 2012 03:09 PM #6Grossel
Since I've being there as a student, I have the grand answer to that: Originally Posted by audioguru
Students that does kill cmos ic's by static electricity makes an expenditure over time. And to reduce the cost, the school decides to go for TTL ic's instead, since the chance is less that a student kill it compared to a cmos.
My teacher said so
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12th April 2012 04:49 PM #7audioguru
I have used thousands of Cmos logic ICs without a grounding wrist-strap and in winter in my part of Canada the static electricity is awful. Not one IC was damaged.
I think students "blow Up" electrolytic capacitors and ICs by connnecting the power supply polarity backwards ON PURPOSE!0Uncle $crooge
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12th April 2012 04:57 PM #8Grossel
Deleted Off Topic.
Moderation.0Last edited by The Moderation Team; 13th April 2012 at 07:28 AM.
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12th April 2012 06:14 PM #9audioguru
Deleted Off Topic.
Moderation.0Last edited by The Moderation Team; 13th April 2012 at 07:28 AM.
Uncle $crooge
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12th April 2012 09:41 PM #10jpanhalt
Deleted Off Topic.
Moderation.0Last edited by The Moderation Team; 13th April 2012 at 07:28 AM. Reason: spelling/word
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