Solid State Relays and EMI

Kibo informs me that "Michael A. Covington"
<look@ai.uga.edu.for.address> stated that:

This cowardly anonymous arsehole is forging my name to this sort of crap
all over Usenet - it was not written by me.

Just to clarify, I take it you are Lionel?

You take it correctly.

(You aren't Michael Covington; I
am

I'm pretty sure I'd be able to tell if I were someone else.

In any case, I would not have assumed that the original pesky message was
signed truthfully. Thanks for pointing out the forgery.

My pleasure.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

 

[Franc Zabkar]

On 5 Aug 2004 02:41:06 -0700, dave_bowlers@yahoo.co.uk (dave) put
finger to keyboard and composed:

Has anybody got any data on a triac manufactured by TAG, p/n T4012BK.

This is NTE's suggested replacement:
http://www.nteinc.com/specs/5600to5699/NTE5679.html


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

 

[Andrew Tweddle]

spacekase wrote:

i am trying to get an older Varian Saturn GC/MS system
[chemistry/chromatography] operational ( a second unit) and NEED an
IOTECH GP488B board. if you have one you would be willing to sell,
please contact Steve Kasa @ AAT Labs Inc, 1255 Buchanan SW, Grand
Rapids, MI 49507, 616-241-6070, or email kheemskerk@voyager.net.
Try checking out some of the taiwanese clone boards or go to a PC dealer

who specializes in GPIB. Often their is backward compatibility in these
products when you can't find that 20 year old card.

regards Andrew

 

[Rich Grise]

John_Lee wrote:
....

These fans will be placed in a way that they
blow air at the sails, thus propelling the boat. I would like to sail
this boat for 5 hours non-stop.

Visions of Wile E. Coyote are dancing in my head. ;-P

Good Luck!
Rich

 

[Dave Platt]

In article <c625758a.0408071543.58eb0b11@posting.google.com>,
John_Lee <wanghes@hotmail.com> wrote:

I've just completed building a fairly long sail boat, a
radio-controlled boat, which is to be powered by both batteries and
solar panels, along with the help of the wind. I'd like to use
separate flexible solar panels, they are extremely light in weight, to
power one small DC fan and one bigger DC fan. Here are the
specifications of those fans: small fan (Rated Voltage: 12VDC, Rated
Power Current: 0.15 Amp, Rate Power Consumption: 1.8 W); big fan
(Rated Voltage: 12VDC, Rated Power Current: 1.0 Amp, Rate Power
Consumption: 12.5 W).

These fans will be placed in a way that they
blow air at the sails, thus propelling the boat. I would like to sail
this boat for 5 hours non-stop.

#splorf#

Beg pardon, but if you mean to do what I think you mean to do... it
won't work. At best, you boat will just sit there, at worst it will
actually travel backwards.

My question: based on the specifications of the fans, what are the
sizes for the solar panels (in terms of Rate Power Consumption) for
the small fan and the big fan? Thank you.

Well, for what it's worth, most easily-available solar panels seem to
require somewhat in excess of 1 square foot of panel space to deliver
10 watts of power in direct bright sun. 2 square feet per 10 watts is
probably a good figure to shoot for.

However, unless you're planning to sail this boat in a circular path
around some sort of "racetrack", and can mount the panels and fans on
the "shore" to blow air forwards at an angle onto the boat as it sails
by... I suggest you re-think your idea.

The old trick of "person on boat holds fan, fan blows air on sails,
sails push boat forwards" only works in cartoons. In real life,
Newton's second law of motion prevents this from working.

--
Dave Platt <dplatt@radagast.org> AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

 

[Dave VanHorn]

Your sail should be a vertical cylinder, which you spin around it's vertical
axis.

 

[Gareth]

Mark (UK) wrote:

HAHAHA!! LOL!!!

Reminds me of a Popeye cartoon, where Bluto is chasing after Popeye and
Olive, who are on a ship - Popeye eats some spinach, then blows at the
sails and the boat zooms off!!

Seriously though, that Newton dude said that for every action, there is
an equal and opposite reaction, so if the fan blows the sail, the boat
will try to move forward, but the fan will also move backwards by the
same amount, therefore making the boat go nowhere

That is true if the fan was blowing forwards directly onto a sail angled
perpendicular to the direction of motion, but suppose you put the sail
at 45 degrees to the desired direction of travel and positioned the fan
at the side of the boat blowing perpendicular to the direction of
travel. I think that would result in some forward force. It would be
less efficient than just having the fan blow backwards with no sails,
but would look more realistic as the sail would have wind in it. I
assume that is what the OP wants.

Gareth.

--
-----------------------------------------------------------------------
To reply to me directly:

Replace privacy.net with: totalise DOT co DOT uk and replace me with
gareth.harris

 

[Charles Jean]

On 8 Aug 2004 01:40:07 -0700, wanghes@hotmail.com (John_Lee) wrote:

I've just completed building a fairly long sail boat, a
radio-controlled boat, which is to be powered by both batteries and
solar panels, along with the help of the wind. I'd like to use
separate flexible solar panels, they are extremely light in weight, to
power one small DC fan and one bigger DC fan. Here are the
specifications of those fans: small fan (Rated Voltage: 12VDC, Rated
Power Current: 0.15 Amp, Rate Power Consumption: 1.8 W); big fan
(Rated Voltage: 12VDC, Rated Power Current: 1.0 Amp, Rate Power
Consumption: 12.5 W). These fans will be placed in a way that they
blow air at the sails, thus propelling the boat. I would like to sail
this boat for 5 hours non-stop.

My question: based on the specifications of the fans, what are the
sizes for the solar panels (in terms of Rate Power Consumption) for
the small fan and the big fan? Thank you.

John.
___

If you are trying to do what I think you are trying to do, you'd
better reread Newton's third law. Will the fans be attached to the
boat?
___



GRAVITY:

It's not just a good idea-IT'S THE LAW!

 

[Rheilly Phoull]

"John_Lee" <wanghes@hotmail.com> wrote in message
news:c625758a.0408071543.58eb0b11@posting.google.com...

I've just completed building a fairly long sail boat, a
radio-controlled boat, which is to be powered by both batteries and
solar panels, along with the help of the wind. I'd like to use
separate flexible solar panels, they are extremely light in weight, to
power one small DC fan and one bigger DC fan. Here are the
specifications of those fans: small fan (Rated Voltage: 12VDC, Rated
Power Current: 0.15 Amp, Rate Power Consumption: 1.8 W); big fan
(Rated Voltage: 12VDC, Rated Power Current: 1.0 Amp, Rate Power
Consumption: 12.5 W). These fans will be placed in a way that they
blow air at the sails, thus propelling the boat. I would like to sail
this boat for 5 hours non-stop.

My question: based on the specifications of the fans, what are the
sizes for the solar panels (in terms of Rate Power Consumption) for
the small fan and the big fan? Thank you.

John.

Take the power and apply it to an underwater fan.

--
Regards ........... Rheilly Phoull

 

wanghes@hotmail.com (John_Lee) wrote:

specifications of those fans: small fan Rate Power Consumption: 1.8 W
big fan Rate Power Consumption: 12.5 W

These fans will be placed in a way that they
blow air at the sails, thus propelling the boat.

I don't think that means what you think it means.

I would like to sail
this boat for 5 hours non-stop.

Will the sun be shining, or do you want battery power to take up the
slack?

My question: based on the specifications of the fans, what are the
sizes for the solar panels (in terms of Rate Power Consumption) for
the small fan and the big fan? Thank you.

Uh, 1.8 watts and 12.5 watts...

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

[Watson A.Name - \"Watt Su]

"Reza" <malekmoh@yahoo.com> wrote in message
news:6c2ca2db.0408080549.7b98ab6@posting.google.com...

Hi

I am designing a High Sampling Rate Digital receiver with following
building blocks:
1-ADC is AD6645 105MSPS 14-bit
2-DDC is GC4016, 100 MSPS 4-ch
3-...

To design a good pcb layout for acheiving the claimed specifications
of the ADC i decided to use PSD to simulate this Mixed-Mode board.
Unfortunately, i am not familiar with this software, and i think it
take too much to be familiar with it.
My question is: Is it possible to use lower level softwares such as
P*otel to do this job?

Professinal answers are welcomed.

Why aren't you asking this on the appropriate newsgroup?
Sci.electronics.cad

 

andy <news4@earthsong.free-online.co.uk> wrote:
[I wrote]

Uh, 1.8 watts and 12.5 watts...

actually not - the standard rating for solar panels is based on an
illumination of 1kW/m^2, but actual sunlight will be less

Ah, right you are, I was confusing the output he needs with the solar
panel ratings. Now that I think about it, mounting "angle" and
shading are going to be nightmares.

How about "as much as you can fit on the boat"? I suspect Rheilly
Phoull's answer of an underwater fan is going to be your best bet...

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

[Mark (UK)]

ROFLMAO

Lewin A.R.W. Edwards wrote:

Consumption: 12.5 W). These fans will be placed in a way that they
blow air at the sails, thus propelling the boat. I would like to sail
this boat for 5 hours non-stop.


I'm reminded of the Good Ship Venus:

The first mate's name was Carter
He really was a farter
When the wind wouldn't blow and the ship wouldn't go
They got Carter the farter to start 'er.

 

[Roger Gt]

<William P.N. Smith> wrote in message
news:bfech09iibju90pdl8lh7ft49jlq60knn4@4ax.com...
: andy <news4@earthsong.free-online.co.uk> wrote:
: [I wrote]
: >> Uh, 1.8 watts and 12.5 watts...
:
: >actually not - the standard rating for solar panels is based on
an
: >illumination of 1kW/m^2, but actual sunlight will be less
:
: Ah, right you are, I was confusing the output he needs with the
solar
: panel ratings. Now that I think about it, mounting "angle" and
: shading are going to be nightmares.
:
: How about "as much as you can fit on the boat"? I suspect
Rheilly
: Phoull's answer of an underwater fan is going to be your best
bet...
:

FYI -- Just so you know:

An "Under water fan" is normally referred to as a "Wheel" on a
boat.

 

"Roger Gt" <not@here.net> wrote:

An "Under water fan" is normally referred to as a "Wheel" on a
boat.

Nope, wheels aren't going to help. He's going to need to put a
propeller on it.

"Does anal-retentive have a hyphen?" 8*)

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

"Roger The Git" <not@here.net> wrote:

Trying to be funny works only if you ARE funny!

Ah, now I understand Roger. (Should I bother with the smileys? Naw,
Roger Git doesn't git them...)

--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com

 

[Roger Gt]

< B. S.> wrote
: "Roger Gt" wrote
: >Trying to be funny works only if you ARE funny!
:
: Ah, now I understand Roger. (Should I bother with the smileys?
Naw,
: Roger Git doesn't git them...)

No, you Don't get it!
Besides, your smiley sucked!

 

[Michael A. Covington]

Has anyone got a source for the ADXL105, cheap? All I seem to be able
to find are suppliers that want $200 minimum orders

How many? I think you can purchase "samples" in small quantities from
Analog Devices.

 

[Spehro Pefhany]

On Mon, 9 Aug 2004 23:18:00 -0400, the renowned "Michael A. Covington"
<look@ai.uga.edu.for.address> wrote:

Has anyone got a source for the ADXL105, cheap? All I seem to be able
to find are suppliers that want $200 minimum orders

How many? I think you can purchase "samples" in small quantities from
Analog Devices.

Or just slap down your plastic and order them from Digikey, and
they'll be in your hands in a matter of hours.

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

 

[Martin Thompson]

"Tim Perry" <timperryspammenot@adelphia.net> writes:

"Martin Thompson" <martin.j.thompson@trw.com> wrote in message
news:u7jsy28p3.fsf@trw.com...

Jerry and Tim,

You both suggest contacting Yamaha directly - would either
of you have any idea where to start? My emails to their support
addresses have been ignored so far :-(

Thanks!

Martin


yamaha wind instrument support

* Phone: (714) 522-9011, 8:30AM to 5:00PM PST/PDT, Monday through Friday
* FAX: (714) 522-9475

Just back off hols, hence the silence on my part!

Anyway, in the UK, spares can be found from 0870 444 5575. Very
helpful they are too: faxed me a picture of the exploded view and then
we identified the right part.

In case it helps anyone in future, the part number is VE135700. They
cost a mere 67p +VAT each!

Thanks to all for the pointers.

Cheers,
Martin