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_hm
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Re: A family heirloom
_hm   7/8/2013 7:06:29 PM
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@Max: No. It is all pneumatic PID controller. Air is supplied at 15 to 30 psi. You can set P, I, D value for tunning the loop. I worked for Taylor Instruments Inc, Rochester and they manufactured them. As I understand, some organization currently do make them. They are very good for class I hazardous environment. Some pics for them:

http://www.google.ca/search?q=pneumatic+pid+controller&tbm=isch&tbo=u&source=univ&sa=X&ei=ZEXbUdmJCo6gyQH_34HoBw&sqi=2&ved=0CDgQsAQ&biw=1307&bih=647

 

SylvieBarak
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AVR action heroes, touch sensors and dragon boards
SylvieBarak   7/8/2013 3:55:58 PM
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Working at Atmel is a bit like being a kid in a candy store in terms of the weird and wonderful stuff I can steal, er, borrow to decorate my desk with. I started small... with a handful of colorful touch sensor boards nabbed from the 4th floor. I then pilfered an AVR man action hero from the creative lab (it is AMAZINGLY awesome and very hunky). Soon after I added a rather exotic looking AVR Dragon board to my collection, a couple of Arduino starter kits, some printouts of the infographics I've designed (on canvas they look super cool), some hexbugs... a half eaten bar of chocolate.

Still doesn't beat the electronic PCB shoe I used to have on my desk at EE Times... but oh well!

Leo Sieben
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ASR-33 Teletype Complete
Leo Sieben   7/8/2013 2:59:11 PM
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Let's make a deal...

Max The Magnificent
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Re: A family heirloom
Max The Magnificent   7/8/2013 10:50:18 AM
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@_hm: I love pneumatic PID controllers

I don't know if I'v ever seen a pneumatic PID controller per se, but I guess that depends on what we're actually talking about -- do you mean an electronoc PIC controller that controls a pneumatic system -- or do you mean the entire controller implemented using pneumatic techniques?


_hm
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Re: A family heirloom
_hm   7/6/2013 7:57:19 PM
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I have my first big digit digital clock of 1981 still clocking at main entrance. I have all my Elektors and those projects stored in various boxes. I love pneumatic PID controllers and analog sample and hold.

Max The Magnificent
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Re: A family heirloom
Max The Magnificent   7/6/2013 12:36:56 PM
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@David: If you'd seen my desk just a couple of weeks ago I'd have taken the "cluttered desk" prize for sure ... bust since I got my office tidid up, I'm desperatly trying to keep it that way ...

David Ashton
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Re: A family heirloom
David Ashton   7/5/2013 8:36:37 PM
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I NEED ONE OF THOSE!!!

Max The Magnificent
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Re: Rememberance of Things Past
Max The Magnificent   7/5/2013 6:49:01 PM
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@Michael: I can't even remember whom I knew with the KSR-33...

Growing old is a real pain, isn't it? :-)

Michael Dunn
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Re: Rememberance of Things Past
Michael Dunn   7/5/2013 6:34:02 PM
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You're bringing back memories of a tape punching experience. I can't even remember whom I knew with the KSR-33, but I needed to punch tapes to get some bipolar ROMs burned! Hard to believe that that was the only method they accepted!!

Anyway, IIRC, I threw together a current loop interface to my Poly 88, and away we went. Pretty sure I still have the tapes, as well as tapes for some early microcomputer programs, like Microchess ferinstance :-)

Max The Magnificent
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Re: Rememberance of Things Past
Max The Magnificent   7/5/2013 6:27:36 PM
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@Michael: Couldn't afford a paper tape reader, eh...?

The sad thing is that I'm sure there were occasions when I could have picked up an old paper tape reader ... but I didn;t because I fuguresd "they's be around for ever" :-)

 

My dream is to pick up an old teletype terminal with fan-fold computer paper and both a punched card reader/eriter and a papertape reader/writer.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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