Driver to drive?

[petrus bitbyter]

"Bill Sloman" <bill.sloman@gmail.com> schreef in bericht
news:68362a53-0b0e-4294-9fe5-654d9f427732@googlegroups.com...

On Wednesday, 22 January 2014 14:00:11 UTC+11, Maynard A. Philbrook Jr.
wrote:
In article <2421137f-4e31-4cbd-bd9d-ff683224dce8@googlegroups.com>,
bill.sloman@gmail.com says...

As for you coming up with something useable - dream on.

Like you and your OSC.,.. useless..

Nothing is useful until it finds an application.

--
Bill Sloman, Sydney

There are so many answers waiting for the question

Anyway, you can get these sinewaves to about any degree of accuracy by a
micro with DA and a relative simple analog filter.

petrus bitbyter

 

[Bill Sloman]

On Thursday, 23 January 2014 00:58:03 UTC+11, petrus bitbyter wrote:

"Bill Sloman" <bill.sloman@gmail.com> schreef in bericht
news:68362a53-0b0e-4294-9fe5-654d9f427732@googlegroups.com...
On Wednesday, 22 January 2014 14:00:11 UTC+11, Maynard A. Philbrook Jr.
wrote:
In article <2421137f-4e31-4cbd-bd9d-ff683224dce8@googlegroups.com>,
bill.sloman@gmail.com says...

As for you coming up with something useable - dream on.

Like you and your OSC.,.. useless.

Nothing is useful until it finds an application.

There are so many answers waiting for the question

My personal favourite is a scheme for minimising the lower frequency harmonic content in a PWM waverform - I thought it up in 1975, and didn't get to use it until 1993. It shows up in my 1996 paper

Meas. Sci. Technol. 7 (1996) 1653–1664.

in section 2.6, and figures 3 and 7.

Another is that my one-time boss - Graham Plows - invented voltage contrast electron microscopy around 1965. It was patented in 1970 (GB1187901) but there wasn't a market for voltage contrast electron microscopes (for looking at individual transistors on the - exposed - surface of an integrated circuit) until about 1979 and I was working on shipping some of the first commercial add-on gear at the end of 1982.

> Anyway, you can get these sinewaves to about any degree of accuracy by a micro with DA and a relative simple analog filter.

The limit there is the 20-bit D/A which you can up-date at 16MHz.

A 20-element shift register with an array of carefully trimmed resistors running into a summing junction working as a low-pass FIR filter can filter a square wave to do as well, with less effort.

Using it on a slightly better approximation to a sine wave - off for 30 degrees, high to 120 degrees, off for 60 degrees, low for 120 degrees and off for 30 degrees - would work even better, if "high" and "low" were equal and opposite to about one part in a million ...

--
Bill Sloman, Sydney

 

On Saturday, January 18, 2014 11:22:18 PM UTC-5, Bob E. wrote:

I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's

almost like it's dissipating the heat faster than I can apply it. With both a

temp-controlled iron (set as high as 700F) and a mondo 100W stick I finally

tried. The solder will barely melt when touched to the braid opposite the

iron.



I've applied some Kester rosin paste flux as well using my trusty Kester

60/40 lead-based rosin core solder. No joy. I'm not holding the braid against

the PCB now, I'm just trying to tin the braid and then deal with melting the

2 solders (on the PCB and the braid) together later.



My first attempt--before I realized that I was overheating it--I melted the

dielectric insulation.



The mesh is made from some silver-colored braid which I thought is tinned

copper but now I'm of the opinion that it's steel; it's certainly not

aluminum. There is also foil which is probably aluminum but I've trimmed that

back and it's not part of this frustrating process right now.



What's the trick to getting this braid to take solder? I've never seen this

before.



Thanks.

hmmm. After all this, I do not know what Bob has, what the metal is. Bob, if you really want to "solder" it, and assuming ts not lead solderable (ie some SS), then get a small butane torch, come in right off the inner tip of the flame, and use silver solder with fluoride or boraxo flux. You may have to dip the coax in water and have the braid just above it. This is ugly behavior, I admit, but you just have to show it who is boss sometimes.
If it IS lead solderable, that same torch can be used with the 60-40 and SnCl4 flux or HCl or even the rosin. Rinse well.

 

[Lasse Langwadt Christense]

Den torsdag den 23. januar 2014 20.02.09 UTC+1 skrev haitic...@gmail.com:

On Saturday, January 18, 2014 11:22:18 PM UTC-5, Bob E. wrote:

I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's



almost like it's dissipating the heat faster than I can apply it. With both a



temp-controlled iron (set as high as 700F) and a mondo 100W stick I finally



tried. The solder will barely melt when touched to the braid opposite the



iron.







I've applied some Kester rosin paste flux as well using my trusty Kester



60/40 lead-based rosin core solder. No joy. I'm not holding the braid against



the PCB now, I'm just trying to tin the braid and then deal with melting the



2 solders (on the PCB and the braid) together later.







My first attempt--before I realized that I was overheating it--I melted the



dielectric insulation.







The mesh is made from some silver-colored braid which I thought is tinned



copper but now I'm of the opinion that it's steel; it's certainly not



aluminum. There is also foil which is probably aluminum but I've trimmed that



back and it's not part of this frustrating process right now.







What's the trick to getting this braid to take solder? I've never seen this



before.







Thanks.



hmmm. After all this, I do not know what Bob has, what the metal is. Bob, if you really want to "solder" it, and assuming ts not lead solderable (ie some SS), then get a small butane torch, come in right off the inner tip of the flame, and use silver solder with fluoride or boraxo flux. You may have to dip the coax in water and have the braid just above it. This is ugly behavior, I admit, but you just have to show it who is boss sometimes.

If it IS lead solderable, that same torch can be used with the 60-40 and SnCl4 flux or HCl or even the rosin. Rinse well.

I have a bottle of something meant to tin metal sheet, looks like it basically
tin and a flus

I tried using it as flus and with that stainless solders beautiful with normal
solder and a soldering iron

-Lasse

 

On Thursday, January 23, 2014 2:37:01 PM UTC-5, Lasse Langwadt Christensen wrote:

Den torsdag den 23. januar 2014 20.02.09 UTC+1 skrev haitic...@gmail.com:

On Saturday, January 18, 2014 11:22:18 PM UTC-5, Bob E. wrote:



I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's







almost like it's dissipating the heat faster than I can apply it. With both a







temp-controlled iron (set as high as 700F) and a mondo 100W stick I finally







tried. The solder will barely melt when touched to the braid opposite the







iron.















I've applied some Kester rosin paste flux as well using my trusty Kester







60/40 lead-based rosin core solder. No joy. I'm not holding the braid against







the PCB now, I'm just trying to tin the braid and then deal with melting the







2 solders (on the PCB and the braid) together later.















My first attempt--before I realized that I was overheating it--I melted the







dielectric insulation.















The mesh is made from some silver-colored braid which I thought is tinned







copper but now I'm of the opinion that it's steel; it's certainly not







aluminum. There is also foil which is probably aluminum but I've trimmed that







back and it's not part of this frustrating process right now.















What's the trick to getting this braid to take solder? I've never seen this







before.















Thanks.







hmmm. After all this, I do not know what Bob has, what the metal is. Bob, if you really want to "solder" it, and assuming ts not lead solderable (ie some SS), then get a small butane torch, come in right off the inner tip of the flame, and use silver solder with fluoride or boraxo flux. You may have to dip the coax in water and have the braid just above it. This is ugly behavior, I admit, but you just have to show it who is boss sometimes.



If it IS lead solderable, that same torch can be used with the 60-40 and SnCl4 flux or HCl or even the rosin. Rinse well.





I have a bottle of something meant to tin metal sheet, looks like it basically

tin and a flus



I tried using it as flus and with that stainless solders beautiful with normal

solder and a soldering iron



-Lasse

interesting. I never heard that. It might be SnCl4. I find scrubbing the metal surface with SS wool helps during the tinning. I'll try it sometime. (There are many SS's, so not sure which one you had - 303, 304, 326, etc.) Can you say more what you had?

 

On Monday, January 27, 2014 10:02:10 AM UTC-5, Robert Macy wrote:

This is a simple switched capacitor filter made by National. Would

somebody send me a copy, or at least provide a URL that HAS it!!! and not

datasheet or alldata crap! If AppNote available that too please.



I just went through the most frustrating 45 minutes trying to get a simple

!@#$#@!#$ data sheet! Google search shows 8,000+ pages of either alldata,

or datasheet, ok so tried going to both, all I got there were ads for

unrelated chips and ?? couldn't even tell, kept asking me to download a

pdf viewer!! what?!



So thought I'd go to the source [which I usually do first] went to

http://www.national.com> which of course took me to <http://www.ti.com

because TI bought out National and TI's website is usually pretty easy to

navigate so did a search for LMF90 only to come up with nothing found.



I'd like a URL ending in .pdf so I can click on it and select 'download

the contents of the link', instead of going off to some jave infected

website that either hangs, delays, my system or wants to give me videos,

and no where in sight is a place to get a copy of the datasheet. Even the

'view' data sheet resulted in nothing happening!! arrrggg! ...temporary

end of rant.



So, anybody have a copy, or know a 'good' URL?

This one was one of the first in a google search:
http://www.ic-on-line.cn/view_download.php?id=1590752&file=0296%5Clmf90_1398788.pdf

Even has listing for brokers still selling it.

Google search terms "LMF90 switched capacitor datasheet" and it went straight to it.

 

[miso]

The clock-tunable thing was pretty convenient for some jobs, especially
back when tight-tolerance capacitors were expensive.

Cheers

Phil Hobbs

The thing with switched capacitor designs is everyone bitched when they
could see the output of the filter, i.e. the charge injection glitch. As
products were designed at higher levels of integration, i.e. modems, the
charge injection was less of an issue because the performance of the system
as a whole was better than the discrete solutions, mostly because nobody
could throw the kind of iron (complex circuitry) at the system as we could
do on silicon.

Until the oversampled converters came along, many systems were implemented
in custom switched capacitor chips.

 

[Greegor]

Yuck!

 

[Greegor]

It looks like a setup for "mission creep" gone insane?

Won't the Substances of Very High Concern list
grow endlessly?

 

On Tuesday, January 28, 2014 4:05:50 PM UTC-5, Robert Baer wrote:
> Greegor wrote: > It looks like a setup for "mission creep" gone insane? > > Won't the Substances of Very High Concern list > grow endlessly? > > Absolutely! That is the function of governments. They should "top off" the list by adding water, since it dissolves everything and the more pure it is, the more corrosive it is. With water on the list, nothing physical could be sold or transported. Solves a lot of problems...

Not exactly. Salt water is more corrosive than pure dihydrogen monoxide. then technically in a vehicle that uses pure glycol as coolant, most petroleum distillates could still be transported. Polypropylene glycol I think has higher thermal conductivity than ethylene glycol so it is more suitable as engine coolan without the addition of dihydrogen monoxide.

The MSDS on dihydrogen monoxide is available on the internet and s quite lengthy concerning its dangers, and is not exhaustive, obviously.

 

[Lasse Langwadt Christense]

Den tirsdag den 28. januar 2014 22.05.50 UTC+1 skrev Robert Baer:

Greegor wrote:

It looks like a setup for "mission creep" gone insane?



Won't the Substances of Very High Concern list

grow endlessly?





Absolutely! That is the function of governments.

They should "top off" the list by adding water, since it dissolves

everything and the more pure it is, the more corrosive it is.

With water on the list, nothing physical could be sold or transported.

Solves a lot of problems...

I don't see anything about selling or transporting, only registering.
Doesn't sound so crazy that if you play around with a 100 ton of dangerous
chemical you need to register it, it case there is a mishap or you
"accidently" lose it down the drain

-Lasse

 

[Robert Baer]

Greegor wrote:

It looks like a setup for "mission creep" gone insane?

Won't the Substances of Very High Concern list
grow endlessly?

Absolutely! That is the function of governments.
They should "top off" the list by adding water, since it dissolves
everything and the more pure it is, the more corrosive it is.
With water on the list, nothing physical could be sold or transported.
Solves a lot of problems...

 

On Tue, 28 Jan 2014 13:05:50 -0800, Robert Baer
<robertbaer@localnet.com> wrote:

Greegor wrote:
It looks like a setup for "mission creep" gone insane?

Won't the Substances of Very High Concern list
grow endlessly?


Absolutely! That is the function of governments.
They should "top off" the list by adding water, since it dissolves
everything and the more pure it is, the more corrosive it is.
With water on the list, nothing physical could be sold or transported.
Solves a lot of problems...

Nah, it just has to be taxed heavily to pay for the impact on the
environment.

 

[John Larkin]

On Tue, 28 Jan 2014 16:50:17 -0500, krw@attt.bizz wrote:

On Tue, 28 Jan 2014 13:05:50 -0800, Robert Baer
robertbaer@localnet.com> wrote:

Greegor wrote:
It looks like a setup for "mission creep" gone insane?

Won't the Substances of Very High Concern list
grow endlessly?


Absolutely! That is the function of governments.
They should "top off" the list by adding water, since it dissolves
everything and the more pure it is, the more corrosive it is.
With water on the list, nothing physical could be sold or transported.
Solves a lot of problems...

Nah, it just has to be taxed heavily to pay for the impact on the
environment.

Water vapor is by far the most active greenhouse gas. And liquid water
absorbs enormous amounts of solar radiation, converting most of it to
heat!

Something needs to be done.

I suggest, deploying into the lakes and oceans, trillions of rubber
duckies, which would reflect sunlight back up into space and save the
planet.



--

John Larkin Highland Technology, Inc

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[John Larkin]

On Tue, 28 Jan 2014 13:54:43 -0800 (PST), jurb6006@gmail.com wrote:

On Tuesday, January 28, 2014 4:05:50 PM UTC-5, Robert Baer wrote:
Greegor wrote: > It looks like a setup for "mission creep" gone insane? > > Won't the Substances of Very High Concern list > grow endlessly? > > Absolutely! That is the function of governments. They should "top off" the list by adding water, since it dissolves everything and the more pure it is, the more corrosive it is. With water on the list, nothing physical could be sold or transported. Solves a lot of problems...

Not exactly. Salt water is more corrosive than pure dihydrogen monoxide. then technically in a vehicle that uses pure glycol as coolant, most petroleum distillates could still be transported. Polypropylene glycol I think has higher thermal conductivity than ethylene glycol so it is more suitable as engine coolan without the addition of dihydrogen monoxide.

The MSDS on dihydrogen monoxide is available on the internet and s quite lengthy concerning its dangers, and is not exhaustive, obviously.

Longterm consumption of H2O is often fatal.


--

John Larkin Highland Technology, Inc

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[Greegor]

Who was talking about 100 tons of any chemical?
Did you read the other thread about tracking
tantalum capacitors etc.?

 

On Tue, 28 Jan 2014 14:00:07 -0800, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Tue, 28 Jan 2014 16:50:17 -0500, krw@attt.bizz wrote:

On Tue, 28 Jan 2014 13:05:50 -0800, Robert Baer
robertbaer@localnet.com> wrote:

Greegor wrote:
It looks like a setup for "mission creep" gone insane?

Won't the Substances of Very High Concern list
grow endlessly?


Absolutely! That is the function of governments.
They should "top off" the list by adding water, since it dissolves
everything and the more pure it is, the more corrosive it is.
With water on the list, nothing physical could be sold or transported.
Solves a lot of problems...

Nah, it just has to be taxed heavily to pay for the impact on the
environment.

Water vapor is by far the most active greenhouse gas. And liquid water
absorbs enormous amounts of solar radiation, converting most of it to
heat!

Something needs to be done.

I suggest, deploying into the lakes and oceans, trillions of rubber
duckies, which would reflect sunlight back up into space and save the
planet.

Perhaps rubber duckie credits?

 

On Tue, 28 Jan 2014 14:01:17 -0800, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Tue, 28 Jan 2014 13:54:43 -0800 (PST), jurb6006@gmail.com wrote:

On Tuesday, January 28, 2014 4:05:50 PM UTC-5, Robert Baer wrote:
Greegor wrote: > It looks like a setup for "mission creep" gone insane? > > Won't the Substances of Very High Concern list > grow endlessly? > > Absolutely! That is the function of governments. They should "top off" the list by adding water, since it dissolves everything and the more pure it is, the more corrosive it is. With water on the list, nothing physical could be sold or transported. Solves a lot of problems...

Not exactly. Salt water is more corrosive than pure dihydrogen monoxide. then technically in a vehicle that uses pure glycol as coolant, most petroleum distillates could still be transported. Polypropylene glycol I think has higher thermal conductivity than ethylene glycol so it is more suitable as engine coolan without the addition of dihydrogen monoxide.

The MSDS on dihydrogen monoxide is available on the internet and s quite lengthy concerning its dangers, and is not exhaustive, obviously.

Longterm consumption of H2O is often fatal.

Amazingly, whether it's consumed in large quantities or in ppb
quantities, it's lethal. Nasty stuff indeed!

 

[John Larkin]

On Tue, 28 Jan 2014 19:00:46 -0500, krw@attt.bizz wrote:

On Tue, 28 Jan 2014 14:00:07 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Tue, 28 Jan 2014 16:50:17 -0500, krw@attt.bizz wrote:

On Tue, 28 Jan 2014 13:05:50 -0800, Robert Baer
robertbaer@localnet.com> wrote:

Greegor wrote:
It looks like a setup for "mission creep" gone insane?

Won't the Substances of Very High Concern list
grow endlessly?


Absolutely! That is the function of governments.
They should "top off" the list by adding water, since it dissolves
everything and the more pure it is, the more corrosive it is.
With water on the list, nothing physical could be sold or transported.
Solves a lot of problems...

Nah, it just has to be taxed heavily to pay for the impact on the
environment.

Water vapor is by far the most active greenhouse gas. And liquid water
absorbs enormous amounts of solar radiation, converting most of it to
heat!

Something needs to be done.

I suggest, deploying into the lakes and oceans, trillions of rubber
duckies, which would reflect sunlight back up into space and save the
planet.

Perhaps rubber duckie credits?

Quack and trade.


--

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

Precision electronic instrumentation

 

[Robert Baer]

Greegor wrote:

Yuck!
YeaBut...new regs, sure to grow.