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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
logic gate applications
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Pehr



Joined: Aug 14, 2005
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PostPosted: Sun Jun 14, 2009 2:28 am    Post subject: logic gate applications Reply with quote  Mark this post and the followings unread

I've found some interesting logic circuits that can easily be patched up with logic gates. Very Happy

Does anyone know if there are any more of these interesting circuits?

NOR-gate latch:
Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.

NAND-gate latch:
Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.

Full adder:
Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.

Half adder:
Posted Image, might have been reduced in size. Click Image to view fullscreen.
Code:
A    B    C    S
0    0    0    0
0    1    0    1
1    0    0    1
1    1    1    0


Positive-edge-triggered D flip-flop:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Sources:
http://en.wikipedia.org/wiki/Adder_(electronics)
http://en.wikipedia.org/wiki/Flip-flop_(electronics)
http://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/nandlatch.html
http://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/norlatch.html#c1

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DGTom



Joined: Dec 08, 2008
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PostPosted: Tue Jun 16, 2009 2:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

Some of these look cool!

I built a 4011 based A/B Input switcher yesterday, great for those 2 not basslines Laughing

super great when all the inputs are 'related' I'm gonna have a look at the flip-flop, I think a dual or quad flip-flop would be a cool addition to my machine.
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synthmonger



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PostPosted: Thu Jun 18, 2009 3:17 am    Post subject: Reply with quote  Mark this post and the followings unread

Don Lancasters TTL, RTL, and CMOS cookbooks has pages of info for that stuff. His cookbooks are fantastic!
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Stream Operator


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PostPosted: Thu Jun 18, 2009 3:23 am    Post subject: Reply with quote  Mark this post and the followings unread

I don't recall if i kept my Don Lancaster books the last time i purged my stuff, but they were worn from years of use. I learned about these circuits in college but forgot it all. Fairly straightforward to re-figure out though.
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droffset



Joined: Feb 02, 2009
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PostPosted: Fri Jun 19, 2009 2:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

You might enjoy this link!

A Java window will pop up at you:
http://falstad.com/circuit
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