Driver to drive?

[John Larkin]

On Sat, 07 Jun 2014 18:34:31 +0200, Glenn <glenn2233@gmail.com> wrote:

On 07/06/14 00.08, John Larkin wrote:



...
mainframe
...
How did people build the pyramids? The thingies on Easter Island?
...

Hello John

Some have argued that some of the stones have been moulded:

Chapter 1 can be downloaded (pdf):
ftp://ftp2.geopolymer.org/geopolyme/pyramid_chapt1.pdf
Quote: "...The proof is there. The samples given to me by the
Egyptologist Jean-Philippe Lauer in 1982 are indeed fragments og
geopolymers (see chapter 8), confirming my own X-ray analysis in
1982-84...A geologist not informed of geopolymer chemistry will assert
with good faith that the stones are natural...",

Main page: The book: They Have Built The Pyramids ISBN 2-86553-157-0
(french), ISBN 0-88029-555-4 (english?):
https://web.archive.org/web/20070927135712/http://www.davidovits.info/29/the-book-they-have-built-the-pyramids
Quote: "...Joseph Davidovits has found hieroglyphic texts describing the
construction of these gigantic monuments! You will understand that all
problems and paradoxes connected to the construction of the Egyptian
pyramids are solved...We can dismiss from our minds the scenario of
numerous thousands of workers crowded onto the work site at Giza
shoulder to shoulder..."

-

The Easter Island thingies walked in place - mystery solved

See for yourself:

Easter Island moai 'walked':
http://www.youtube.com/watch?v=yvvES47OdmY

June 07, 2013, Easter Island's 'Walking' Stone Heads Stir Debate:
http://www.livescience.com/37277-easter-island-statues-walked-there.html
Quote: "...
The statue moved easily.
"It goes from something you can't imagine moving at all, to kind of
dancing down the road," Lipo told LiveScience.
..."

-

Maybe you can "mould" or "walk" the mainframe where it should be?

Go figure

Glenn

Maybe use rollers, like largish-diameter steel or PVC pipe. If Egyptians and
Romans could move heavy stuff, we engineers should be able, too. Or we can rent
that enormous forklift again.

https://dl.dropboxusercontent.com/u/53724080/Gear/PnP/Green_Forklift.JPG



--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation

 

[Spehro Pefhany]

On Sat, 07 Jun 2014 08:59:07 -0700, the renowned John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 07 Jun 2014 17:11:00 +1000, Sylvia Else <sylvia@not.at.this.address
wrote:

On 7/06/2014 8:08 AM, John Larkin wrote:

How did people build the pyramids?

They used whips.

Sylvia.

Cool. I'll try that.

http://tinyurl.com/m95apbx

or maybe

http://tinyurl.com/qfekagd

for the smaller employees.

There's an app for that.
https://itunes.apple.com/ca/app/pocket-whip/id319927587?mt=8


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Spehro Pefhany]

On Sat, 07 Jun 2014 09:45:58 -0700, the renowned John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

Maybe use rollers, like largish-diameter steel or PVC pipe. If Egyptians and
Romans could move heavy stuff, we engineers should be able, too. Or we can rent
that enormous forklift again.

https://dl.dropboxusercontent.com/u/53724080/Gear/PnP/Green_Forklift.JPG

The Egyptians apparently poured water (so say the experts, I'm not
sure how they know it was water- the shape of the vessel?) to
lubricate the sliding motion over sand.

http://en.wikipedia.org/wiki/Djehutihotep#mediaviewer/File:Colosse-dj%C3%A9houtih%C3%A9tep2.jpg

Apparently Egyptologists initially assumed the liquid was some kind of
purification ritual and not a way to reduce the required workforce by
50%.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Glenn]

On 07/06/14 18.34, Glenn wrote:
....

The Easter Island thingies walked in place - mystery solved
....

Glenn

Another Easter Island mystery surfaces - literally...


Easter Island Heads Have A Surprise !:
http://www.youtube.com/watch?v=zWj2keMob-c


May 30, 2012, Archaeologist digs deep to reveal Easter Island torsos:
http://newsroom.ucla.edu/stories/easter-island-statues-revealed-234519
Quote: "...
Van Tilburg was surprised to discover that a large segment of the
general public hadn’t realized that what they knew only as the Easter
Island "heads" actually had bodies.
....
From her studies of these two statues, the archaeologist is convinced
that the statues were partially buried naturally by eroded dirt, not by
the Rapa Nui. She found approximately the same amount of dirt that
partially buried the statues also filled the quarries located near where
they stood.
....
Van Tilburg’s excavations extended down to the base of the statues and
revealed etched petroglyphs on the backs of the figures. She was
especially intrigued by the repetition of crescent shapes that represent
Polynesian canoes, she said.
...."

Glenn

 

[whit3rd]

On Friday, June 6, 2014 3:08:05 PM UTC-7, John Larkin wrote:

The Universal pick-and-place is still crated up. ...weighs about 8000
pounds. It laughs at our old electric forklift. Two pallet jacks will
lift it a couple inches off the floor, but no amount of human strength
will get them to roll.

So, make a ground-effect machine. Two pallet jacks fit under, so maybe
50 square feet, you need compressed air at a little over 1 PSI to lift it.
Be sure to have a few folk with ropes (or come-alongs) when the friction
drops to zero!

Your floor IS level, I hope...

 

[Jon Elson]

John Larkin wrote:

We got a deal on a demo PnP and it turned out to be a 2-head machine. So
we'll use it a half hour a day, instead of an hour a day. The dual-head
might be why it's so heavy.

Two totally independent heads, or two heads on one XY gantry?
My Philips CSM84 has 3 heads, all within about an inch of each
other on one assembly. Two have centering chuck jaws, the 3rd has
the jaws removed and is used with a mechanical alignment unit.
It is totally an old-school machine, no vision except the
"beam sensor" for picking up fiducial marks.

Jon

 

[John Larkin]

On Sun, 08 Jun 2014 18:59:33 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 6:04 PM, John Larkin wrote:
On Sun, 08 Jun 2014 16:24:21 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 3:31 PM, John Larkin wrote:
On Sun, 08 Jun 2014 12:37:14 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 11:00 AM, John Larkin wrote:
On Sat, 07 Jun 2014 20:13:28 -0400, rickman <gnuarm@gmail.com> wrote:

The past, present and future of embedded processors is the low end where
the chips are disposable and literally billions are produced each year.
Intel and Xilinx have a small piece of that market.

Aren't there TV sets with FPGAs inside? Makes sense.

What? You often make no sense to anyone but yourself. Why would they
put an FPGA into a TV? There is certainly little reason to include a
Zync chip.

http://www.xilinx.com/applications/broadcast/digital-television.html

The very first words on the page are, "High-end digital televisions at
the forefront of the display industry". So they are talking about the
Lamborgini's of TVs, not the ones you see in Walmart and Costco... in
other words, irrelevant.


Much cheaper to add an ARM CPU and a memory chip along with
the tuner and video chips.


Your hostility is blocking your ability to think. That's bad engineering.

http://www.altera.com/literature/wp/wp-01120-vx1-display-port.pdf

Sorry if I am coming across as hostile. I just find your comments to be
very silly and worse are the ways you keep trying to prove the points.

Posting links to facts is silly?

Multicore ARMs may well eat the Intel server market, and tablets are killing
laptops and big-box PCs. Intel is still, basically, running the 8008 instruction
set, with AMDs extentions, and everything else that they tried has crashed hard;
Iapx32, their RISC thing, their dabbling in ARM, and the gigabuck Itanic fiasco.

Lol. Yes tablets are the up and coming thing, but laptops are hardly
dying. ARMs in servers are a long way out still. Intel is not as
stupid as other, smaller companies. They don't need to work in niche
markets.

Ditto:

Every one of these support my statement.

http://armservers.com/

"Canonical and Applied Micro demonstrated IceHouse Production OpenStack
deployment in preparation for Computex next week". They made it to a
trade show, clearly everything we see at a trade show is big time!


http://www.eetimes.com/document.asp?doc_id=1257961

"ARM server debuts", that is not mainstream, that is getting your toe in
the door.



http://www.pcworld.com/article/2092620/microsoft-joins-arm-server-effort.html

"Microsoft has joined a new project to accelerate the development of
ARM-based servers, suggesting ARM versions of products like Windows
Server and Hyper-V could be in the works." How many years before this
reaches the market?

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.

The future will be here pretty soon. Be ready.



--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation

 

[rickman]

On 6/8/2014 7:13 PM, John Larkin wrote:

On Sun, 08 Jun 2014 18:59:33 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 6:04 PM, John Larkin wrote:
On Sun, 08 Jun 2014 16:24:21 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 3:31 PM, John Larkin wrote:
On Sun, 08 Jun 2014 12:37:14 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 11:00 AM, John Larkin wrote:
On Sat, 07 Jun 2014 20:13:28 -0400, rickman <gnuarm@gmail.com> wrote:

The past, present and future of embedded processors is the low end where
the chips are disposable and literally billions are produced each year.
Intel and Xilinx have a small piece of that market.

Aren't there TV sets with FPGAs inside? Makes sense.

What? You often make no sense to anyone but yourself. Why would they
put an FPGA into a TV? There is certainly little reason to include a
Zync chip.

http://www.xilinx.com/applications/broadcast/digital-television.html

The very first words on the page are, "High-end digital televisions at
the forefront of the display industry". So they are talking about the
Lamborgini's of TVs, not the ones you see in Walmart and Costco... in
other words, irrelevant.


Much cheaper to add an ARM CPU and a memory chip along with
the tuner and video chips.


Your hostility is blocking your ability to think. That's bad engineering.

http://www.altera.com/literature/wp/wp-01120-vx1-display-port.pdf

Sorry if I am coming across as hostile. I just find your comments to be
very silly and worse are the ways you keep trying to prove the points.

Posting links to facts is silly?



Multicore ARMs may well eat the Intel server market, and tablets are killing
laptops and big-box PCs. Intel is still, basically, running the 8008 instruction
set, with AMDs extentions, and everything else that they tried has crashed hard;
Iapx32, their RISC thing, their dabbling in ARM, and the gigabuck Itanic fiasco.

Lol. Yes tablets are the up and coming thing, but laptops are hardly
dying. ARMs in servers are a long way out still. Intel is not as
stupid as other, smaller companies. They don't need to work in niche
markets.

Ditto:

Every one of these support my statement.

http://armservers.com/

"Canonical and Applied Micro demonstrated IceHouse Production OpenStack
deployment in preparation for Computex next week". They made it to a
trade show, clearly everything we see at a trade show is big time!


http://www.eetimes.com/document.asp?doc_id=1257961

"ARM server debuts", that is not mainstream, that is getting your toe in
the door.



http://www.pcworld.com/article/2092620/microsoft-joins-arm-server-effort.html

"Microsoft has joined a new project to accelerate the development of
ARM-based servers, suggesting ARM versions of products like Windows
Server and Hyper-V could be in the works." How many years before this
reaches the market?

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.

The future will be here pretty soon. Be ready.

I see you have given up trying to discuss the issue. Thanks for the
debate.

--

Rick

 

[John Larkin]

On Sun, 08 Jun 2014 19:59:19 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 7:13 PM, John Larkin wrote:
On Sun, 08 Jun 2014 18:59:33 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 6:04 PM, John Larkin wrote:
On Sun, 08 Jun 2014 16:24:21 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 3:31 PM, John Larkin wrote:
On Sun, 08 Jun 2014 12:37:14 -0400, rickman <gnuarm@gmail.com> wrote:

On 6/8/2014 11:00 AM, John Larkin wrote:
On Sat, 07 Jun 2014 20:13:28 -0400, rickman <gnuarm@gmail.com> wrote:

The past, present and future of embedded processors is the low end where
the chips are disposable and literally billions are produced each year.
Intel and Xilinx have a small piece of that market.

Aren't there TV sets with FPGAs inside? Makes sense.

What? You often make no sense to anyone but yourself. Why would they
put an FPGA into a TV? There is certainly little reason to include a
Zync chip.

http://www.xilinx.com/applications/broadcast/digital-television.html

The very first words on the page are, "High-end digital televisions at
the forefront of the display industry". So they are talking about the
Lamborgini's of TVs, not the ones you see in Walmart and Costco... in
other words, irrelevant.


Much cheaper to add an ARM CPU and a memory chip along with
the tuner and video chips.


Your hostility is blocking your ability to think. That's bad engineering.

http://www.altera.com/literature/wp/wp-01120-vx1-display-port.pdf

Sorry if I am coming across as hostile. I just find your comments to be
very silly and worse are the ways you keep trying to prove the points.

Posting links to facts is silly?



Multicore ARMs may well eat the Intel server market, and tablets are killing
laptops and big-box PCs. Intel is still, basically, running the 8008 instruction
set, with AMDs extentions, and everything else that they tried has crashed hard;
Iapx32, their RISC thing, their dabbling in ARM, and the gigabuck Itanic fiasco.

Lol. Yes tablets are the up and coming thing, but laptops are hardly
dying. ARMs in servers are a long way out still. Intel is not as
stupid as other, smaller companies. They don't need to work in niche
markets.

Ditto:

Every one of these support my statement.

http://armservers.com/

"Canonical and Applied Micro demonstrated IceHouse Production OpenStack
deployment in preparation for Computex next week". They made it to a
trade show, clearly everything we see at a trade show is big time!


http://www.eetimes.com/document.asp?doc_id=1257961

"ARM server debuts", that is not mainstream, that is getting your toe in
the door.



http://www.pcworld.com/article/2092620/microsoft-joins-arm-server-effort.html

"Microsoft has joined a new project to accelerate the development of
ARM-based servers, suggesting ARM versions of products like Windows
Server and Hyper-V could be in the works." How many years before this
reaches the market?

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.

The future will be here pretty soon. Be ready.

I see you have given up trying to discuss the issue. Thanks for the
debate.

Google arm server and see what's actually happening.


--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation

 

On Mon, 09 Jun 2014 13:15:00 +0200, David Brown
<david.brown@hesbynett.no> wrote:

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.


ARM servers already outweigh Itanium servers by a factor of thousands.

Who are using Itaniums these days ?

This is an honest question.

I know that some VMS (OpenVMS) customers are running Itaniums for
their Itanium virtual machines, but what else ?

Are they using VAXclusters or perhaps some Tandem systems on Itaniums?

Redundant CPUs, redundant disks and redundant interconnects are
nothing new, DEC had some good redundant systems available in the
1980's and no doubt, IBM mainframes had similar features prior to
that.

 

[josephkk]

On Tue, 10 Jun 2014 00:14:46 +0300, upsidedown@downunder.com wrote:

On Mon, 09 Jun 2014 13:15:00 +0200, David Brown
david.brown@hesbynett.no> wrote:

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.


ARM servers already outweigh Itanium servers by a factor of thousands.

Who are using Itaniums these days ?

People that got locked in with specialty software that they are too cheap
to replace.

This is an honest question.

I know that some VMS (OpenVMS) customers are running Itaniums for
their Itanium virtual machines, but what else ?

Are they using VAXclusters or perhaps some Tandem systems on Itaniums?

Redundant CPUs, redundant disks and redundant interconnects are
nothing new, DEC had some good redundant systems available in the
1980's and no doubt, IBM mainframes had similar features prior to
that.

 

[josephkk]

On Tue, 10 Jun 2014 00:14:46 +0300, upsidedown@downunder.com wrote:

On Mon, 09 Jun 2014 13:15:00 +0200, David Brown
david.brown@hesbynett.no> wrote:

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.


ARM servers already outweigh Itanium servers by a factor of thousands.

Who are using Itaniums these days ?

This is an honest question.

I know that some VMS (OpenVMS) customers are running Itaniums for
their Itanium virtual machines, but what else ?

Are they using VAXclusters or perhaps some Tandem systems on Itaniums?

Redundant CPUs, redundant disks and redundant interconnects are
nothing new, DEC had some good redundant systems available in the
1980's and no doubt, IBM mainframes had similar features prior to
that.

 

[rickman]

On 6/9/2014 10:02 AM, John Larkin wrote:

On Sun, 08 Jun 2014 19:59:19 -0400, rickman <gnuarm@gmail.com> wrote:

I see you have given up trying to discuss the issue. Thanks for the
debate.


Google arm server and see what's actually happening.

That proves my point. The ARM server market is in its infancy with most
of the articles being about "firsts" and "sampling" and other marketing
hype... but wait, here is another opinion from the Motley Fool...

There's nothing magical about ARM servers
Marketing headlines that ARM server players typically try to push are
usually of one or more of the following flavors:

ARM is disrupting x86 servers
ARM servers will offer choice
ARM is lower power

Unfortunately, while these marketing points may be catchy, they're
almost patently false.

This is what you wanted me to read, right? Read the rest of the article
instead of drinking the marketing Koolaid.

http://www.fool.com/investing/general/2014/01/29/dont-buy-amds-arm-server-hype.aspx

Turns out the current crop of ARMs from AMD and Intel just can't stack
up against the x86 favorites.

The good news is that we will all reap the benefits in lower power
devices across the board, laptops, desktops, tablets, etc., while still
running the bulky, inefficient OS that we all know and... well know.

--

Rick

 

[David Brown]

On 10/06/14 04:00, rickman wrote:

On 6/9/2014 10:02 AM, John Larkin wrote:
On Sun, 08 Jun 2014 19:59:19 -0400, rickman <gnuarm@gmail.com> wrote:

I see you have given up trying to discuss the issue. Thanks for the
debate.


Google arm server and see what's actually happening.

That proves my point. The ARM server market is in its infancy with most
of the articles being about "firsts" and "sampling" and other marketing
hype... but wait, here is another opinion from the Motley Fool...

There's nothing magical about ARM servers
Marketing headlines that ARM server players typically try to push are
usually of one or more of the following flavors:

ARM is disrupting x86 servers
ARM servers will offer choice
ARM is lower power

Unfortunately, while these marketing points may be catchy, they're
almost patently false.

This is what you wanted me to read, right? Read the rest of the article
instead of drinking the marketing Koolaid.

http://www.fool.com/investing/general/2014/01/29/dont-buy-amds-arm-server-hype.aspx


Turns out the current crop of ARMs from AMD and Intel just can't stack
up against the x86 favorites.

The good news is that we will all reap the benefits in lower power
devices across the board, laptops, desktops, tablets, etc., while still
running the bulky, inefficient OS that we all know and... well know.

One of the great things about benchmarks is that they are almost
entirely useless - except to make whatever positive or negative point
that interests you at the time.

In particular, benchmarks like SPEC are of almost no relevance for
servers. In most server applications, the emphasis is on pushing data
around - not on calculations. And there will be multiple parallel
threads, not one single thread like in SPEC. Will ARM be better at this
than x86 in performance per watt? I don't know - but I /do/ know that
SPEC benchmarks tell us absolutely nothing.

Another issue is that what matters is total power - not the power of the
cpu chip. In x86 systems, there is traditionally quite significant
power in the peripheral chips - in ARM systems, peripheral interfaces
are usually part of the main SOC. Which system will be lower power in
/total/ ? Again, I don't know - and again, a power rating for the cpu
chip tells us very little.

Then there is the issue of standby or idle power compared to full power.
Many servers spend a lot of time idling, and so low-power modes can be
more relevant than performance per watt. Many server applications don't
/need/ high performance - it doesn't take much cpu power to saturate
GBit Ethernet on a file server or static web server. A cpu with lower
performance per watt might easily have lower total power consumption.


I don't see ARM taking over the high-end server space in the foreseeable
future - but I think there is plenty of variety in the server market
where they could quickly be a good solution.

 

[David Brown]

On 09/06/14 23:14, upsidedown@downunder.com wrote:

On Mon, 09 Jun 2014 13:15:00 +0200, David Brown
david.brown@hesbynett.no> wrote:

Clearly ARMs in servers are a way off. Yeah, there might be a few out
there, but I bet there are still more Itaniums, lol.


ARM servers already outweigh Itanium servers by a factor of thousands.

Who are using Itaniums these days ?

This is an honest question.

I know that some VMS (OpenVMS) customers are running Itaniums for
their Itanium virtual machines, but what else ?

There are some who believed the promises and expectations from Intel and
HP, and invested heavily in Itanium machines and software (note - I am
not implying this was a con - Intel and HP believed in what they were
doing). Changing architectures later is expensive, so some users kept
their Itaniums.

Are they using VAXclusters or perhaps some Tandem systems on Itaniums?

Redundant CPUs, redundant disks and redundant interconnects are
nothing new, DEC had some good redundant systems available in the
1980's and no doubt, IBM mainframes had similar features prior to
that.

IBM have mainframes that have run for decades without a second of
downtime, and which have no original parts except for the frame itself -
/everything/ is redundant and hot-replaceable.

Several high-end cpu architectures, such as Power (and Itanium) support
redundant and hot-pluggable cpus. I believe Power is the most popular
cpu for people looking for that sort of reliability - but Itanium does
have a few adherents. Of course, if you want top-tier hardware and you
need to use Windows (an oxymoron, I know), then Itanium is your only
choice - Power and other cpus are Unix and Linux only.

 

On Saturday, June 7, 2014 8:43:14 PM UTC-4, whit3rd wrote:

On Friday, June 6, 2014 3:08:05 PM UTC-7, John Larkin wrote:

The Universal pick-and-place is still crated up. ...weighs about 8000
pounds. It laughs at our old electric forklift. Two pallet jacks will
lift it a couple inches off the floor, but no amount of human strength
will get them to roll.

So, make a ground-effect machine. Two pallet jacks fit under, so maybe
50 square feet, you need compressed air at a little over 1 PSI to lift it.
Be sure to have a few folk with ropes (or come-alongs) when the friction
drops to zero!

Your floor IS level, I hope...

Clever. And not all that hard.

Discussion:
http://www.sawmillcreek.org/showthread.php?50900-Air-Cushion-Machinery-Movers-How-to-build

Old web page:
https://web.archive.org/web/20070206131250/http://www.ultimategarage.com/hoverpad.htm

Cheers,
James Arthur

 

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[Rheilly Phoull]

On 11/06/14 16:27, pmgenerator2014@gmail.com wrote:

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Gurgaon, Haryana-122017
India
+91-9811980116

Since the specs simply show dimensions, it leads one to think on the
expertise of the engineering.

 

[Jim Thompson]

On Sun, 08 Jun 2014 14:22:20 -0600, m II <C@in.the.hat> wrote:

I need to simplify a 'duty cycle to voltage' circuit. The range it has
to cover are a varying 5 volt square wave pulse with a frequency range
of 40 Hertz to 400 Hertz. Once the frequency is set it stays there while
the duty cycle of the square wave is varied within the set time period.

The idea is to use a voltmeter as a percent duty cycle indicator. ie:
10.0 volts = 100 percent duty cycle. If the frequency was always
constant I think I could get away with a resistor and capacitor and just
measure the average voltage. Things become more difficult with the
variable frequency thrown in.

Any help would be welcome.

mike

Somewhat outside the box thinking...

<http://www.analog-innovations.com/SED/DutyCycle%28SEB%29.pdf>

Generate a master ramp synchronized to the input frequency, but
amplitude "AGC'd" to be 1V peak by a controlled current source.

Replication of this same current into same value capacitor, but
switched by the duty cycle, presents a peak voltage proportional to
duty cycle... 1V = 100%, irrespective of frequency.

AGC method shown is a crude "quicky"... in actual practice corrections
are by "dollop" ;-)

First used this scheme in the summer of 1968 when I was at
Philco-Ford, Santa Clara, for an automotive inductive storage ignition
system timing:

Turn on charging of inductor. When it reaches 5.5A go into regulation
mode, holding 5.5A until firing.

System senses at firing time, was inductor into regulation already...
delay timing by a dollop before beginning next charging cycle.

If inductor current was not yet at 5.5A, make timing a dollop earlier.

(Scheme minimizes/optimizes switch power dissipation.)

I used to scare my bosses (Bob Rutherford/John Welty) by driving (1968
Ford Thunderbird 429CID) up and down 101 with my legs crossed
Yoga-style and drive only using the cruise control buttons up to 100
MPH, to see if I could out-run such a timing scheme... I couldn't ;-)

...Jim Thompson
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