Solid State Relays and EMI

De-engineering is done with a sledge hammer. Or are you talking reverse
engineering?

Are they sealed in epoxy? Do the ICs have regular numbers?

This sort of thing needs a real pro if it is to do you much good. We're not
cheap.


"Bob" <bobrieck_hj@hotmail.com> wrote in message
news:75f60077.0409201619.8b1ca3a@posting.google.com...
I need to de-engineer some electronic circuits.
I live in the U.S.A.. in the Illinois Wisconsin area.

Thanks in advance.
Bobrieck_hj@hotmail.com
Click to expand...
 
Totally agreed, this needs to be done professionally unless one has an
infinite amount of time to devote to doing it themselves with the high
probability of destruction to the original devices. Even when done
professionally the procedures may render the original useless as a result of
the procedures required to remove coatings, epoxies, etc from the items.
Cost incentives must be dealt with as well as legal containments regarding
the original suppliers or manufacturers. <
??Maybe just soaking in the "Chicago River" over night may seem benificial
to remove many of the coatings? LOL Seen that water flow way too many
times. (Just in jest) gov.
"Dan Fraser" <dmfraser@sbcglobal.net> wrote in message
Click to expand...
news:Q165d.19685$QJ3.10336@newssvr21.news.prodigy.com...
De-engineering is done with a sledge hammer. Or are you talking reverse
engineering?

Are they sealed in epoxy? Do the ICs have regular numbers?

This sort of thing needs a real pro if it is to do you much good. We're
not
cheap.


"Bob" <bobrieck_hj@hotmail.com> wrote in message
news:75f60077.0409201619.8b1ca3a@posting.google.com...
I need to de-engineer some electronic circuits.
I live in the U.S.A.. in the Illinois Wisconsin area.

Thanks in advance.
Bobrieck_hj@hotmail.com
Click to expand...
 
In article <pnval0hvblo7b23h0p3044pr581g5opm1j@4ax.com>,
Charlie+ <chasg> wrote:

I need an easily brewed very small quantity of electroplating solution
for silver on copper without going to cyanide based commercial stuff
(this is only for a couple of lumped tuned circuits and I dont have
plated wire) and wondered if anyone had a homebrew recipe!?
Click to expand...
Check out www.caswellplating.com - they have some small plating kits
which are cyanide-free and easy to use. You can buy one of their
little "Plug&Plate" kits, or just buy a bottle of the plating solution
and use your own power supply and an improvised plating wand (or a
homemade dunk tank).

I did the latter, to re-silverplate a damaged roller inductor in an
antenna tuner I bought a couple of years ago. It worked like a charm.

I don't know the details of their solution's chemistry, but I suspect
that you might be able to extend its lifetime significantly in a
tank-plating system by using a pure-silver electrode (silver wire from
a local jeweler?) to replenish the silver ion content as the silver is
plated out on the base metal.

--
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!
 
On Sat, 25 Sep 2004 17:21:22 -0000, dplatt@radagast.org (Dave Platt)
wrote as underneath my scribble :

Thanks Dave for the pointer - might be the way to go if nobody has a
home brew, not too expensive either!
Charlie+
Check out www.caswellplating.com - they have some small plating kits
which are cyanide-free and easy to use. You can buy one of their
little "Plug&Plate" kits, or just buy a bottle of the plating solution
and use your own power supply and an improvised plating wand (or a
homemade dunk tank).

I did the latter, to re-silverplate a damaged roller inductor in an
antenna tuner I bought a couple of years ago. It worked like a charm.

I don't know the details of their solution's chemistry, but I suspect
that you might be able to extend its lifetime significantly in a
tank-plating system by using a pure-silver electrode (silver wire from
a local jeweler?) to replenish the silver ion content as the silver is
plated out on the base metal.
Click to expand...
 
On Sun, 26 Sep 2004 08:58:36 -0700, the renowned "Watson A.Name -
\"Watt Sun, the Dark Remover\"" <NOSPAM@dslextreme.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6104400972&ssPageName
=MERC_VI_RSCC_Pr4_PcY_BIN_Stores

This guy sells components, but why he'd expect to get $2200 for a lame
piece of wood is beyond me. I guess I'll have to watch it and see what
happens.

One wonders what goes on inside a seller's peapickin' brain when
something like this pops up. Is he tetched, or just too much lead in
his diet..
Click to expand...
The listing fee is capped at around the cost of a beer, so let him
dream..


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
 
"Wayne" <nospam-mail@wlawson.com> wrote in message news:UZD5d.642$Ue2.549@newsfe6-gui.ntli.net...
Hi

I have searched the web and found many lists of dielectric constant lists.
However, non of them make ref. to where they acquired the information from.
1/ Can anyone tell me where I can find the dielectric constant tables for
different materials at dif. temps.
2/ What frequency do they use for measuring the dielectric constant value
for example if you look at the chemical datasheet for say IPA it says the
dielectric constant is equal to 18.3 @ 25 degC. However, they do not say
what the frequency is? What is the standard method for measuring dielectric
constants; as it value changes as frequency changes with some materials?


Cheers


Wayne


Why does it have to be at a certain frequency? If the measurement is taken by timing the charge or discharge of a capacitor made from the material, then there is no single frequency.

Doesn't the CRC handbook have all that stuff? Physical properties or materials, etc.
 
"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10ldprmjqf0cn53@corp.supernews.com...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6104400972&ssPageName
=MERC_VI_RSCC_Pr4_PcY_BIN_Stores

This guy sells components, but why he'd expect to get $2200 for a lame
piece of wood is beyond me. I guess I'll have to watch it and see what
happens.

One wonders what goes on inside a seller's peapickin' brain when
something like this pops up. Is he tetched, or just too much lead in
his diet..

--It was all of those hi power magnetic experments he did. Warped the gray
matter in his skull.
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
Click to expand...
 
In article <82914599.0409271240.37f565f@posting.google.com>,
Tim <tim@dehoucke.be> wrote:

I have an 89C52 microcontroller that uses an external i2c e˛prom. The
89C52 doesn't have i˛c support, so I have to implement them with
"bitbanging" them. The purpose of my setup is to store data in the
eeprom.

Where can I find working I2C routines for my 89C52?
Click to expand...
Try http://www.programmersheaven.com/zone5/cat27/, which came us as
one of the first choices on a Google search for "8051 I2C". They seem
to have several different sets of examples on tap.

--
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!
 
On 27 Sep 2004 13:40:45 -0700, the renowned tim@dehoucke.be (Tim)
wrote:

I have an 89C52 microcontroller that uses an external i2c e˛prom. The
89C52 doesn't have i˛c support, so I have to implement them with
"bitbanging" them. The purpose of my setup is to store data in the
eeprom.

Where can I find working I2C routines for my 89C52?
Click to expand...
Did you try google? http://www.ustr.net/files/download.shtml

Dunno if any of them work well, but it's pretty easy to write an I2C
master from scratch.


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
 
Tim schrieb:

Where can I find working I2C routines for my 89C52?
Click to expand...
http://www.atmel.com/dyn/resources/prod_documents/doc0507.pdf


Regards,
Dieter
 
"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10ldprmjqf0cn53@corp.supernews.com...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6104400972&ssPageName
=MERC_VI_RSCC_Pr4_PcY_BIN_Stores

This guy sells components, but why he'd expect to get $2200 for a lame
piece of wood is beyond me. I guess I'll have to watch it and see what
happens.
Click to expand...
If he thinks it's "totally unique" I can only say he needs to put down his
experiments once in a while and go for a walk in the woods...
 
"Warren Weber" <hiview@bresnan.net> wrote in message
news:wYednfDwm4gL5crcRVn-qA@bresnan.com...
"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com
wrote
in message news:10ldprmjqf0cn53@corp.supernews.com...


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6104400972&ssPageName
=MERC_VI_RSCC_Pr4_PcY_BIN_Stores

This guy sells components, but why he'd expect to get $2200 for a
lame
piece of wood is beyond me. I guess I'll have to watch it and see
what
happens.

One wonders what goes on inside a seller's peapickin' brain when
something like this pops up. Is he tetched, or just too much lead
in
his diet..

--It was all of those hi power magnetic experments he did. Warped
the gray
matter in his skull.
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
Click to expand...
[snip]
This guy refuses to put his followup on a separate line, making it look
like *I* posted the response. _I_did_not_!
 
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