Old schematic

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DavidCP2010

Joined Mar 18, 2015
2
I found this jewel while searching through some old paperwork that had been sitting in my closet for quite a long time. The date listed the back of the paper stated it was from March 13th 2011.
Which is surprising because that is before I graduated high school. Talk about a flashback.

I'm not really sure what I was trying to do back then nor do I have any idea what it does. It's neat to look at though. I haven't even looked at a schematic since high school so it's rather vague to me.

Anybody have a guess as to what it was supposed to do?
 

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Hypatia's Protege

Joined Mar 1, 2015
3,228
I found this jewel while searching through some old paperwork that had been sitting in my closet for quite a long time. The date listed the back of the paper stated it was from March 13th 2011.
Which is surprising because that is before I graduated high school. Talk about a flashback.

I'm not really sure what I was trying to do back then nor do I have any idea what it does. It's neat to look at though. I haven't even looked at a schematic since high school so it's rather vague to me.

Anybody have a guess as to what it was supposed to do?
You, sir, must be very young! 2011 = old times?!?!?! :D

As regards the schematic --- Well, upon cursory consideration, it looks as if you've got a clock generator 'feeding' a chain of counters (in the upper left) --- Stage outputs to sequentially enable (apparent) analog multiplexers...? While it is suggestive of an electronic 'cross-bar' network, recurrent strobed selection wouldn't seem to apply...

Best regards
HP
 
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absf

Joined Dec 29, 2010
1,968
The top left is probably a 555 timer pulse generator followed by 5 stages of flip flops. Below them are 14 identical logic networks.

If the picture is clear enough to see how the lines are connected. May be it is possible to see what they are trying to do...

Allen
 

atferrari

Joined Jan 6, 2004
5,011
Three NANDs (ANDS) to a NAND (AND?). In between there is an (analog) switch? Scanning is very bad.

Based on my experience, if you do not ecognize this, forget it. Maybe you discarded it and did something better, or more complete.
 
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Thread Starter

DavidCP2010

Joined Mar 18, 2015
2
Three NANDs (ANDS) to a NAND (AND?). In between there is an (analohg) switch? Scanning is very bad.

Based on my experience, if you do not ecognize this, fo0rget it. Maybe you discarded it and did something better, or more complete.
Yeah I doubted it was good practice or even safe for that matter. Otherwise I would have written some notes a while back.
 

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