Help with small solenoid
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Posts: 46,084
Hi,
I am trying to design a circuit to trigger a small solenoid
controlled by a stamp. I think I found the solenoid that I want to
use and also just got the MOSFET's from glitchbuster.com. The specs
on the solenoid is 9v, 325 ohms, 4.5 watts which I hope to power with
a standard 9v alkaline battery. I have been advised that the 9v
battery may not have sufficient current to get the solenoid moving
and have seen similar circuits that use a capacitor to give solenoids
an additional boost by storing electrical energy for the inital
push. Any ideas or leads to where I could get more info? I have no
idea what value cap I need or where to incorporate it into the
circuit. Thanks
I am trying to design a circuit to trigger a small solenoid
controlled by a stamp. I think I found the solenoid that I want to
use and also just got the MOSFET's from glitchbuster.com. The specs
on the solenoid is 9v, 325 ohms, 4.5 watts which I hope to power with
a standard 9v alkaline battery. I have been advised that the 9v
battery may not have sufficient current to get the solenoid moving
and have seen similar circuits that use a capacitor to give solenoids
an additional boost by storing electrical energy for the inital
push. Any ideas or leads to where I could get more info? I have no
idea what value cap I need or where to incorporate it into the
circuit. Thanks
Comments
Something wrong with your spec for the solenoid can't be 4.5W @ 9 VDC,
AND with a resistance 325 Ohms. If it is 325 Ohms then at 9 VDC in will
consume 9/325= 0.0276 Amps, which equates to (I^2 * R) 0.00077 * 9 =
0.249 Watts.
4.5 watts from a 9volt battery over any period of time is not really
"do-able", but 0.249w is. Check the Voltage of the solenoid,
but more info on intended duty cycle of solenoid required etc.
Rob
Original Message
From: outrigger19a <hilokine@g...> [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=agVaKcb1G92C_3wRuCoH-mpadkdP4i0L835GPyaF9g62b1rE_4Lq3W-4Ayb2yNrHAjQQkPvQdMlS]hilokine@g...[/url
Sent: 14 January 2003 01:15
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Help with small solenoid
Hi,
I am trying to design a circuit to trigger a small solenoid
controlled by a stamp. I think I found the solenoid that I want to
use and also just got the MOSFET's from glitchbuster.com. The specs
on the solenoid is 9v, 325 ohms, 4.5 watts which I hope to power with
a standard 9v alkaline battery. I have been advised that the 9v
battery may not have sufficient current to get the solenoid moving
and have seen similar circuits that use a capacitor to give solenoids
an additional boost by storing electrical energy for the inital
push. Any ideas or leads to where I could get more info? I have no
idea what value cap I need or where to incorporate it into the
circuit. Thanks
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which equates to (I^2 * R) 0.00077 * 9 = 0.249 Watts.
Should Be :
which equates to (I^2 * R) 0.00077 * 325 = 0.249 Watts.
Ps I've built a unit that might interest you, It was for the Kick down
auto transmission on my 69 Mustang. I couldn't find a proper kickdown
linkage here in the UK, So I made an "electronic" one. The problem I had
was that the 12 Volt solenoid I used didn't have enough "pull" at the
end of its travel. So made a Voltage doubling circuit to give it a
momentary 24V (appox) for about 1 second. You only need 1 DPCO relay, 1
capacitor, and a resistor. You could do it a transistor bridge, but this
was simple and crude, and has been working with out fault for the last 2
years. If you want more details let me know.
Rob
Hi
Something wrong with your spec for the solenoid can't be 4.5W @ 9 VDC,
AND with a resistance 325 Ohms. If it is 325 Ohms then at 9 VDC in will
consume 9/325= 0.0276 Amps, which equates to (I^2 * R) 0.00077 * 9 =
0.249 Watts. 4.5 watts from a 9volt battery over any period of time is
not really "do-able", but 0.249w is. Check the Voltage of the solenoid,
but more info on intended duty cycle of solenoid required etc.
Rob
My error, the 325 is approx. ampere turns (what ever that is). After
more careful reading, the correct resistance is listed as 18.9 ohms.
It has a 100% duty cycle but will actually be used with many very
quick cycles (<30ms) for a few minutes at a time and then periods of
rest in between. Does this look any better? As I mentioned, the
solenoid would not be "on" for long duration but repeated rapid
cycles. I've seen similar circuits also powered by a 9v but not sure
what the rating for those solenoids are or where I could acquire
them. The only solenoids that I have been able to locate are these...
Due to space limitations, I can only have a single 9v battery so
hoping that someone can figure out this capacitor boost thing. Thanks
--- In basicstamps@yahoogroups.com, "Rob" <robbed666@b...> wrote:
>
>
> Mistake :
> which equates to (I^2 * R) 0.00077 * 9 = 0.249 Watts.
>
> Should Be :
> which equates to (I^2 * R) 0.00077 * 325 = 0.249 Watts.
>
> Ps I've built a unit that might interest you, It was for the Kick
down
> auto transmission on my 69 Mustang. I couldn't find a proper
kickdown
> linkage here in the UK, So I made an "electronic" one. The problem
I had
> was that the 12 Volt solenoid I used didn't have enough "pull" at
the
> end of its travel. So made a Voltage doubling circuit to give it a
> momentary 24V (appox) for about 1 second. You only need 1 DPCO
relay, 1
> capacitor, and a resistor. You could do it a transistor bridge, but
this
> was simple and crude, and has been working with out fault for the
last 2
> years. If you want more details let me know.
>
> Rob
>
> Hi
> Something wrong with your spec for the solenoid can't be 4.5W @ 9
VDC,
> AND with a resistance 325 Ohms. If it is 325 Ohms then at 9 VDC in
will
> consume 9/325= 0.0276 Amps, which equates to (I^2 * R) 0.00077 * 9 =
> 0.249 Watts. 4.5 watts from a 9volt battery over any period of
time is
> not really "do-able", but 0.249w is. Check the Voltage of the
solenoid,
> but more info on intended duty cycle of solenoid required etc.
>
> Rob
writes:
> Hi,
> I am trying to design a circuit to trigger a small solenoid
> controlled by a stamp. I think I found the solenoid that I want to
> use and also just got the MOSFET's from glitchbuster.com. The specs
> on the solenoid is 9v, 325 ohms, 4.5 watts which I hope to power with
> a standard 9v alkaline battery. I have been advised that the 9v
> battery may not have sufficient current to get the solenoid moving
> and have seen similar circuits that use a capacitor to give solenoids
> an additional boost by storing electrical energy for the inital
> push. Any ideas or leads to where I could get more info? I have no
> idea what value cap I need or where to incorporate it into the
> circuit. Thanks
>
The first question I would like to ask is "how many times do you expect the
solenoid to actuate from that 9V battery?" Solenoids do require a lot of
initial current to start actuation and yes, a capacitor will help but you may
only get 2 or 3 firings before the battery goes dead. Even with the
capacitor, the current requirement for the battery is still there.
Let's see, 4.5 watts divided by 9V gives us 0.5 amps needed for nominal
operation of the solenoid at 9 Volts, DC That battery isn't going to do much
for you. You can put several of them in parallel to increase the amount of
current available and that will help.
Hope this is of some help to you.
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]
I mentioned, there are currently commercial units available. My
thinking is that it would be more rewarding and chanllenging to
design my own version. Anyone know of a source for 9v tubular
solenoids?
--- In basicstamps@yahoogroups.com, cnc002@a... wrote:
> In a message dated 1/13/03 8:15:38 PM Eastern Standard Time,
hilokine@g...
> writes:
>
>
> > Hi,
> > I am trying to design a circuit to trigger a small solenoid
> > controlled by a stamp. I think I found the solenoid that I want
to
> > use and also just got the MOSFET's from glitchbuster.com. The
specs
> > on the solenoid is 9v, 325 ohms, 4.5 watts which I hope to power
with
> > a standard 9v alkaline battery. I have been advised that the 9v
> > battery may not have sufficient current to get the solenoid
moving
> > and have seen similar circuits that use a capacitor to give
solenoids
> > an additional boost by storing electrical energy for the inital
> > push. Any ideas or leads to where I could get more info? I have
no
> > idea what value cap I need or where to incorporate it into the
> > circuit. Thanks
> >
>
> The first question I would like to ask is "how many times do you
expect the
> solenoid to actuate from that 9V battery?" Solenoids do require a
lot of
> initial current to start actuation and yes, a capacitor will help
but you may
> only get 2 or 3 firings before the battery goes dead. Even with
the
> capacitor, the current requirement for the battery is still there.
>
> Let's see, 4.5 watts divided by 9V gives us 0.5 amps needed for
nominal
> operation of the solenoid at 9 Volts, DC That battery isn't going
to do much
> for you. You can put several of them in parallel to increase the
amount of
> current available and that will help.
>
> Hope this is of some help to you.
>
> 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]
>Thanks, I guess I had better keep searching for another solenoid. As
>I mentioned, there are currently commercial units available. My
>thinking is that it would be more rewarding and chanllenging to
>design my own version. Anyone know of a source for 9v tubular
>solenoids?
What is it that you are attempting to actuate ? A solenoid may not be the
most suitable device for the job. Depending on your needs, a rotary actuator
with a cam, may provide the kind of linear displacement that you need with far
less current consumption, and little or no start-up penalty.
http://www.mcmaster.com
You should be able to find all the spec sheets for all
different sizes here.
what I found that a 6 volt solenoid intermittent is really a
3 volt continuous duty.
They play with the time of actuation by using a larger
voltage on there continuous duty solenoids
Original Message
From: <hilokine@g...>
To: <basicstamps@yahoogroups.com>
Sent: January 14, 2003 10:04 PM
Subject: [noparse][[/noparse]basicstamps] Re: Help with small solenoid
: Thanks, I guess I had better keep searching for another
solenoid. As
: I mentioned, there are currently commercial units
available. My
: thinking is that it would be more rewarding and
chanllenging to
: design my own version. Anyone know of a source for 9v
tubular
: solenoids?
:
: --- In basicstamps@yahoogroups.com, cnc002@a... wrote:
: > In a message dated 1/13/03 8:15:38 PM Eastern Standard
Time,
: hilokine@g...
: > writes:
: >
: >
: > > Hi,
: > > I am trying to design a circuit to trigger a small
solenoid
: > > controlled by a stamp. I think I found the solenoid
that I want
: to
: > > use and also just got the MOSFET's from
glitchbuster.com. The
: specs
: > > on the solenoid is 9v, 325 ohms, 4.5 watts which I
hope to power
: with
: > > a standard 9v alkaline battery. I have been advised
that the 9v
: > > battery may not have sufficient current to get the
solenoid
: moving
: > > and have seen similar circuits that use a capacitor to
give
: solenoids
: > > an additional boost by storing electrical energy for
the inital
: > > push. Any ideas or leads to where I could get more
info? I have
: no
: > > idea what value cap I need or where to incorporate it
into the
: > > circuit. Thanks
: > >
: >
: > The first question I would like to ask is "how many
times do you
: expect the
: > solenoid to actuate from that 9V battery?" Solenoids do
require a
: lot of
: > initial current to start actuation and yes, a capacitor
will help
: but you may
: > only get 2 or 3 firings before the battery goes dead.
Even with
: the
: > capacitor, the current requirement for the battery is
still there.
: >
: > Let's see, 4.5 watts divided by 9V gives us 0.5 amps
needed for
: nominal
: > operation of the solenoid at 9 Volts, DC That battery
isn't going
: to do much
: > for you. You can put several of them in parallel to
increase the
: amount of
: > current available and that will help.
: >
: > Hope this is of some help to you.
: >
: > 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.
:
:
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http://docs.yahoo.com/info/terms/
:
:
> At 06:04 AM 1/15/03 +0000, outrigger19a <hilokine@g...> wrote:
> >Thanks, I guess I had better keep searching for another solenoid.
As
> >I mentioned, there are currently commercial units available. My
> >thinking is that it would be more rewarding and chanllenging to
> >design my own version. Anyone know of a source for 9v tubular
> >solenoids?
> What is it that you are attempting to actuate ? A solenoid may not
be the
> most suitable device for the job. Depending on your needs, a rotary
actuator
> with a cam, may provide the kind of linear displacement that you
need with far
> less current consumption, and little or no start-up penalty.
@@@@@@@@
Hi Bruce,
Unfortunately, I need a really rapid actuation because I hope to have
that solenoid activate and deactivate at least 10 cycles per second.
Sounds farfetched but as I mentioned, there are current commercially
produced versions available. Problem is they were probably designed
by electronic genius's which I am not...
wrote:
> http://solenoidcity.com/solenoid/solenoidcatalog.htm
>
> You should be able to find all the spec sheets for all
> different sizes here.
> what I found that a 6 volt solenoid intermittent is really a
> 3 volt continuous duty.
> They play with the time of actuation by using a larger
> voltage on there continuous duty solenoids
>
>
>
Original Message
> From: <hilokine@g...>
> To: <basicstamps@yahoogroups.com>
> Sent: January 14, 2003 10:04 PM
> Subject: [noparse][[/noparse]basicstamps] Re: Help with small solenoid
>
>
> : Thanks, I guess I had better keep searching for another
> solenoid. As
> : I mentioned, there are currently commercial units
> available. My
> : thinking is that it would be more rewarding and
> chanllenging to
> : design my own version. Anyone know of a source for 9v
> tubular
> : solenoids?
> :
> : --- In basicstamps@yahoogroups.com, cnc002@a... wrote:
> : > In a message dated 1/13/03 8:15:38 PM Eastern Standard
> Time,
> : hilokine@g...
> : > writes:
> : >
> : >
> : > > Hi,
> : > > I am trying to design a circuit to trigger a small
> solenoid
> : > > controlled by a stamp. I think I found the solenoid
> that I want
> : to
> : > > use and also just got the MOSFET's from
> glitchbuster.com. The
> : specs
> : > > on the solenoid is 9v, 325 ohms, 4.5 watts which I
> hope to power
> : with
> : > > a standard 9v alkaline battery. I have been advised
> that the 9v
> : > > battery may not have sufficient current to get the
> solenoid
> : moving
> : > > and have seen similar circuits that use a capacitor to
> give
> : solenoids
> : > > an additional boost by storing electrical energy for
> the inital
> : > > push. Any ideas or leads to where I could get more
> info? I have
> : no
> : > > idea what value cap I need or where to incorporate it
> into the
> : > > circuit. Thanks
> : > >
> : >
> : > The first question I would like to ask is "how many
> times do you
> : expect the
> : > solenoid to actuate from that 9V battery?" Solenoids do
> require a
> : lot of
> : > initial current to start actuation and yes, a capacitor
> will help
> : but you may
> : > only get 2 or 3 firings before the battery goes dead.
> Even with
> : the
> : > capacitor, the current requirement for the battery is
> still there.
> : >
> : > Let's see, 4.5 watts divided by 9V gives us 0.5 amps
> needed for
> : nominal
> : > operation of the solenoid at 9 Volts, DC That battery
> isn't going
> : to do much
> : > for you. You can put several of them in parallel to
> increase the
> : amount of
> : > current available and that will help.
> : >
> : > Hope this is of some help to you.
> : >
> : > 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/
> :
> :
Thanks for your reply and actually, that's the solenoids that I had
been looking at. I called the manufacturer and described my useage
and they recommended the 100% duty cycle. Looking at the specs, I
noticed that the longer duty cycle solenoids require less current but
also less force. In your message, are you saying that the 9v 100%
duty cycle is actually an 18v lesser duty? Do you know there would
be any advantage to interchanging them? Thanks
@@@@@@@
--- In basicstamps@yahoogroups.com, "Larry Gaminde" <lgaminde@t...>
wrote:
> http://solenoidcity.com/solenoid/solenoidcatalog.htm
>
> You should be able to find all the spec sheets for all
> different sizes here.
> what I found that a 6 volt solenoid intermittent is really a
> 3 volt continuous duty.
> They play with the time of actuation by using a larger
> voltage on there continuous duty solenoids
>
>
>
Original Message
> From: <hilokine@g...>
> To: <basicstamps@yahoogroups.com>
> Sent: January 14, 2003 10:04 PM
> Subject: [noparse][[/noparse]basicstamps] Re: Help with small solenoid
>
>
> : Thanks, I guess I had better keep searching for another
> solenoid. As
> : I mentioned, there are currently commercial units
> available. My
> : thinking is that it would be more rewarding and
> chanllenging to
> : design my own version. Anyone know of a source for 9v
> tubular
> : solenoids?
> :
> : --- In basicstamps@yahoogroups.com, cnc002@a... wrote:
> : > In a message dated 1/13/03 8:15:38 PM Eastern Standard
> Time,
> : hilokine@g...
> : > writes:
> : >
> : >
> : > > Hi,
> : > > I am trying to design a circuit to trigger a small
> solenoid
> : > > controlled by a stamp. I think I found the solenoid
> that I want
> : to
> : > > use and also just got the MOSFET's from
> glitchbuster.com. The
> : specs
> : > > on the solenoid is 9v, 325 ohms, 4.5 watts which I
> hope to power
> : with
> : > > a standard 9v alkaline battery. I have been advised
> that the 9v
> : > > battery may not have sufficient current to get the
> solenoid
> : moving
> : > > and have seen similar circuits that use a capacitor to
> give
> : solenoids
> : > > an additional boost by storing electrical energy for
> the inital
> : > > push. Any ideas or leads to where I could get more
> info? I have
> : no
> : > > idea what value cap I need or where to incorporate it
> into the
> : > > circuit. Thanks
> : > >
> : >
> : > The first question I would like to ask is "how many
> times do you
> : expect the
> : > solenoid to actuate from that 9V battery?" Solenoids do
> require a
> : lot of
> : > initial current to start actuation and yes, a capacitor
> will help
> : but you may
> : > only get 2 or 3 firings before the battery goes dead.
> Even with
> : the
> : > capacitor, the current requirement for the battery is
> still there.
> : >
> : > Let's see, 4.5 watts divided by 9V gives us 0.5 amps
> needed for
> : nominal
> : > operation of the solenoid at 9 Volts, DC That battery
> isn't going
> : to do much
> : > for you. You can put several of them in parallel to
> increase the
> : amount of
> : > current available and that will help.
> : >
> : > Hope this is of some help to you.
> : >
> : > 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/
> :
> :