Driving a Solenoid
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Posts: 46,084
Looking for a method to drive a solenoid from a Stamp and not use a
mechanical relay to drive it. The solenoid draws about 1amp at 12v DC.
My initial research has taken me to the IRF511, but may not be a viable
option due to its static discharge challenges.
Does anyone else have a simple drive circuit for a 1amp DC load?
John
mechanical relay to drive it. The solenoid draws about 1amp at 12v DC.
My initial research has taken me to the IRF511, but may not be a viable
option due to its static discharge challenges.
Does anyone else have a simple drive circuit for a 1amp DC load?
John
Comments
that this chip's maximum current rating is 1Amp.
--- In basicstamps@y..., "John D. Kerr" <jdkerr@p...> wrote:
> Looking for a method to drive a solenoid from a Stamp and not use a
> mechanical relay to drive it. The solenoid draws about 1amp at 12v
DC.
>
> My initial research has taken me to the IRF511, but may not be a
viable
> option due to its static discharge challenges.
>
> Does anyone else have a simple drive circuit for a 1amp DC load?
>
> John
[noparse][[/noparse]Non-text portions of this message have been removed]
At 06:30 PM 8/25/2002 -0400, you wrote:
>Dont let static discharge be a concern. This problem is highly exaggerated
_________________________________
Mike Walsh
walsh@i...
[noparse][[/noparse]Non-text portions of this message have been removed]
Mosfets. How often does it actual happen, not often. In twenty years of
working with these devices I can not comfirm one failure from ESD.
[noparse][[/noparse]Non-text portions of this message have been removed]
> Not data, common sense, ESD is a problem with any PN
> junction not just
> Mosfets. How often does it actual happen, not often.
> In twenty years of
> working with these devices I can not comfirm one
> failure from ESD.
Just my 2 cents on this...When I worked for a fortune
500 company a few years ago, there were some problems
related to some Lasers in Fiber-Optic Amplifiers that
were failing in the field. These devices were
supposed to last 10 years or more, but some were
failing well below that. The company that made the
laser "pumps" did alot of research into this and found
that while these were being installed, adequate ESD
precautions were NOT being taken. As a result the
pumps were sustaining damage to their PN junctions
within the laser module. The modules were passing the
tests, but later these same modules would fail at
random times due to the breakdown within the device.
In a device with that kind of cost you can see where
the need to provide adequate ESD protection took top
priority.
=====
Chris Savage
Knight Designs
324 West Main Street
Montour Falls, NY 14865
(607) 535-6777
http://www.knightdesigns.com
__________________________________________________
Do You Yahoo!?
Yahoo! Finance - Get real-time stock quotes
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was responsible for creating ESD procedures for the lab. Did a lot of
research and had several companies audit the facility. Bottom line, never
found any solid evidence to support anything associated with ESD damage. I
have noticed that when solutions for circuit problems are limited-- ESD makes
a great escape goat. After reviewing the process came to the conclusion that
a lot of companies are making big bucks from ESD hysteria
[noparse][[/noparse]Non-text portions of this message have been removed]
dstyles669@a... writes:
> Recently worked on ISO 9001 Certification for an electronic lab in Detroit.
> I
> was responsible for creating ESD procedures for the lab. Did a lot of
> research and had several companies audit the facility. Bottom line, never
> found any solid evidence to support anything associated with ESD damage. I
> have noticed that when solutions for circuit problems are limited -- ESD
> makes
> a great escape goat. After reviewing the process came to the conclusion
> that
> a lot of companies are making big bucks from ESD hysteria
>
>
>
I COULDN'T AGREE MORE ABOUT THAT. I work with electronic components almost
on a daily basis in the field without any ESD protection in many cases due to
the situation, and I have yet to find a single case where ESD has ever caused
failure of a component when handled. I have seen ESD cause failure of
components in equipment that was used around large sheets of plastic and the
static charge was enormous, creating a spark of a quarter inch or more, even
with that there was not a huge amount of damage, just a couple of components
were damaged.
Regards,
Randy Abernathy
4626 Old Stilesboro Road
Acworth, GA 30101
Phone / Fax: 770-974-5295
E-mail: cnc002@a...
We service, install and repair industrial woodworking machinery
Specializing in SCM / SCMI CNC Panel Saws and Routers
[noparse][[/noparse]Non-text portions of this message have been removed]
And I agree too! I work with components practically everyday as well.
And I have yet to see any of the problems, that the folks who make CMOS
logic complain about. Of course, I've got all my CMOS logic chips
stuffed in to protective foam, and all my TTL chips that I use on a
regular basis similarly stored. That diode is necessary for protecting
the driving circuits from the backflow from a coil, such as worn by a
solenoid, or a relay. I never figured out why, but it is supposed to be
there.
Gregg C Levine hansolofalcon@w...
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke."· Obi-Wan Kenobi
(This company dedicates this E-Mail to General Obi-Wan Kenobi )
(This company dedicates this E-Mail to Master Yoda )
>
Original Message
> From: cnc002@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=lkieEkUswl8k8eO-BLKYpBq1yJSZrcLfSPPPEG5J9k9UWtfmlndXpoY5QYetuYIH-BQ_nvKnPd4]cnc002@a...[/url
> Sent: Tuesday, August 27, 2002 1:40 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Driving a Solenoid
>
> In a message dated 8/27/02 1:08:29 PM Eastern Daylight Time,
> dstyles669@a... writes:
>
>
> > Recently worked on ISO 9001 Certification for an electronic lab in
Detroit.
> > I
> > was responsible for creating ESD procedures for the lab. Did a lot
of
> > research and had several companies audit the facility. Bottom line,
never
> > found any solid evidence to support anything associated with ESD
damage. I
> > have noticed that when solutions for circuit problems are limited --
ESD
> > makes
> > a great escape goat. After reviewing the process came to the
conclusion
> > that
> > a lot of companies are making big bucks from ESD hysteria
> >
> >
> >
>
> I COULDN'T AGREE MORE ABOUT THAT. I work with electronic components
> almost
> on a daily basis in the field without any ESD protection in many cases
due to
> the situation, and I have yet to find a single case where ESD has ever
caused
> failure of a component when handled. I have seen ESD cause failure of
> components in equipment that was used around large sheets of plastic
and the
> static charge was enormous, creating a spark of a quarter inch or
more, even
> with that there was not a huge amount of damage, just a couple of
components
> were damaged.
>
> Regards,
>
> Randy Abernathy
> 4626 Old Stilesboro Road
> Acworth, GA 30101
> Phone / Fax: 770-974-5295
> E-mail: cnc002@a...
> We service, install and repair industrial woodworking machinery
> Specializing in SCM / SCMI CNC Panel Saws and Routers
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
and Body of
> the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
hansolofalcon@w... writes:
> Hello from Gregg C. Levine
> And I agree too! I work with components practically everyday as well.
> And I have yet to see any of the problems, that the folks who make CMOS
> logic complain about. Of course, I've got all my CMOS logic chips
> stuffed in to protective foam, and all my TTL chips that I use on a
> regular basis similarly stored. That diode is necessary for protecting
> the driving circuits from the backflow from a coil, such as worn by a
> solenoid, or a relay. I never figured out why, but it is supposed to be
> there.
>
> Gregg C Levine hansolofalcon@w...
>
I might be able to shed a little light on that little diode. When using a
digital controller or computer to operate solenoids, etc., the "spike" that
sometimes occurs when a coil's field collapses can, on occasion, cause a
problem with the controller if low voltage is being used, such as 5V TTL
levels. The diode "shorts" the coil and drains off the current before the
spike can develop. On AC coils we use a resistor/capacitor suppressor or a
varistor for more or less the same purpose. That is, of course, why we
normally use 24Vdc or 110Vac levels for such things as relay coils and limit
switches on machines.
Regards,
Randy Abernathy
4626 Old Stilesboro Road
Acworth, GA 30101
Phone / Fax: 770-974-5295
E-mail: cnc002@a...
We service, install and repair industrial woodworking machinery
Specializing in SCM / SCMI CNC Panel Saws and Routers
[noparse][[/noparse]Non-text portions of this message have been removed]
car.
A reverse voltage spike is generated as the field collaspes. What the diode
does is to shunt that reverse voltage spike away from the transistor.
The problem is the transistors don't do well at all when you reverse the
voltage across them. The diode helps to prevent that from occuring.
Original Message
From: Gregg C Levine [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=KhQHLvAHw8HDsYCGYwFK7ugA49oNKIeHGhvyz3pC9IQl5W2EfiWmIo8ufiW-IRKMcgP46NFcB1DI6P41lyFKnp9wM8nDOUA]hansolofalcon@w...[/url
Sent: Tuesday, August 27, 2002 12:48 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Driving a Solenoid
Hello from Gregg C Levine
And I agree too! I work with components practically everyday as well.
And I have yet to see any of the problems, that the folks who make CMOS
logic complain about. Of course, I've got all my CMOS logic chips
stuffed in to protective foam, and all my TTL chips that I use on a
regular basis similarly stored. That diode is necessary for protecting
the driving circuits from the backflow from a coil, such as worn by a
solenoid, or a relay. I never figured out why, but it is supposed to be
there.
Gregg C Levine hansolofalcon@w...
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke."· Obi-Wan Kenobi
(This company dedicates this E-Mail to General Obi-Wan Kenobi )
(This company dedicates this E-Mail to Master Yoda )
>
Original Message
> From: cnc002@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Q8_xfUWF6VrmrfRwSVuuvW8xSCUYhlG8fGf5iKLoJF6woPJzAvKJX4YI2_wK0zAfTMP05yN1]cnc002@a...[/url
> Sent: Tuesday, August 27, 2002 1:40 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Driving a Solenoid
>
> In a message dated 8/27/02 1:08:29 PM Eastern Daylight Time,
> dstyles669@a... writes:
>
>
> > Recently worked on ISO 9001 Certification for an electronic lab in
Detroit.
> > I
> > was responsible for creating ESD procedures for the lab. Did a lot
of
> > research and had several companies audit the facility. Bottom line,
never
> > found any solid evidence to support anything associated with ESD
damage. I
> > have noticed that when solutions for circuit problems are limited --
ESD
> > makes
> > a great escape goat. After reviewing the process came to the
conclusion
> > that
> > a lot of companies are making big bucks from ESD hysteria
> >
> >
> >
>
> I COULDN'T AGREE MORE ABOUT THAT. I work with electronic components
> almost
> on a daily basis in the field without any ESD protection in many cases
due to
> the situation, and I have yet to find a single case where ESD has ever
caused
> failure of a component when handled. I have seen ESD cause failure of
> components in equipment that was used around large sheets of plastic
and the
> static charge was enormous, creating a spark of a quarter inch or
more, even
> with that there was not a huge amount of damage, just a couple of
components
> were damaged.
>
> Regards,
>
> Randy Abernathy
> 4626 Old Stilesboro Road
> Acworth, GA 30101
> Phone / Fax: 770-974-5295
> E-mail: cnc002@a...
> We service, install and repair industrial woodworking machinery
> Specializing in SCM / SCMI CNC Panel Saws and Routers
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
and Body of
> the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
I too had a very similar situation whereas after about 3-to-6 months
of running 24/7 we were experiencing component failures at random on
some matrix switching cards in a large video router. After replacing
about 4 to 5 cards in 3 months, we knew something was wrong. I had
thought some kind of ESD damage at some point had occured. The
component failures were CMOS devices but the devices were not the
same devices in all cases and were random. Finally after threatining
the manufacture of the router with legal action we received some
relief. The president of the company was comming down to visit us and
check the unit out. This guy was also the engineer who designed all
of the circuitry. What we thought was ESD damage to the CMOS devices
somewhere along the line was not. What actually happened is that the
manufacture had changed their board subcontractor to a lower bid on
outsourcing the board component stuffing and wave soldering. What
they had found was during the circuit board wave soldering process,
the solder was becomming more and more contaminated as expected.
However, at a certain point instead of changing or cleaning and
rejuvinating the solder, the subcontractor was just increasing the
solder temperature to maintain an acceptable solder flow. It was
determined that the excessive heat from this procedure had indeed
damaged some of the CMOS devices. All the boards were passing the QC
tests and 72 hour burn in period at the factory but were failing
after some time in the field.
--- In basicstamps@y..., Chris Savage <knight_designs@y...> wrote:
> --- dstyles669@a... wrote:
> > Not data, common sense, ESD is a problem with any PN
> > junction not just
> > Mosfets. How often does it actual happen, not often.
> > In twenty years of
> > working with these devices I can not comfirm one
> > failure from ESD.
>
> Just my 2 cents on this...When I worked for a fortune
> 500 company a few years ago, there were some problems
> related to some Lasers in Fiber-Optic Amplifiers that
> were failing in the field. These devices were
> supposed to last 10 years or more, but some were
> failing well below that. The company that made the
> laser "pumps" did alot of research into this and found
> that while these were being installed, adequate ESD
> precautions were NOT being taken. As a result the
> pumps were sustaining damage to their PN junctions
> within the laser module. The modules were passing the
> tests, but later these same modules would fail at
> random times due to the breakdown within the device.
> In a device with that kind of cost you can see where
> the need to provide adequate ESD protection took top
> priority.
>
>
> =====
> Chris Savage
> Knight Designs
> 324 West Main Street
> Montour Falls, NY 14865
> (607) 535-6777
>
> http://www.knightdesigns.com
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Finance - Get real-time stock quotes
> http://finance.yahoo.com