solenoid valve at 12v
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Posts: 46,084
Hi
I am new to all of this and I want to use a BS2 to control a solenoid valve at
12v.
What do I need to interface it with the BOE since it is at 5v?
Help
Kevin
I am new to all of this and I want to use a BS2 to control a solenoid valve at
12v.
What do I need to interface it with the BOE since it is at 5v?
Help
Kevin
Comments
the mean time a no brainer solution is get a MOSFET......IRL520.
Connect stamp output directly to the GATE
Connect 1 meg from the GATE to ground
Connect the SOURCE to ground
Connect the DRAIN to the solenoid minus terminal
Connect the solenoid positive terminal to 12 volts
DONE.......overkill but DONE....ie....no brainer
see www.glitchbuster.com
I am not affiliated with glitch buster at all, but inexpensive shipping.
ken
Hi
I am new to all of this and I want to use a BS2 to control a solenoid valve
at
12v.
What do I need to interface it with the BOE since it is at 5v?
Help
Kevin
[noparse][[/noparse]Non-text portions of this message have been removed]
The no brainer solution is almost there but left off what I believe to
be one critical component to prevent the inductive kick from the
solonoid coil from killing your MOSFET. You need to add a garden
variety power diode (ie, 1N4001....4005) reverse biased across the
solonoid coil, or from drain to source.
Case 1: diode anode to Drain, cathode to +12Volts
or
Case 2: diode anote to (source)ground, diode cathode to Drain
Either one should keep your MOSFET from going west the first time you
release the solonoid.
Call this the "brainer" solution. Actually, it comes from years of
experience. Have fun.
Horace
--- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> I am SURE someplace in one of the parallax tutorials this is
covered.....In
> the mean time a no brainer solution is get a MOSFET......IRL520.
>
> Connect stamp output directly to the GATE
> Connect 1 meg from the GATE to ground
> Connect the SOURCE to ground
> Connect the DRAIN to the solenoid minus terminal
> Connect the solenoid positive terminal to 12 volts
> DONE.......overkill but DONE....ie....no brainer
>
> see www.glitchbuster.com
> I am not affiliated with glitch buster at all, but inexpensive
shipping.
>
> ken
>
>
> Hi
> I am new to all of this and I want to use a BS2 to control a
solenoid valve
> at
> 12v.
> What do I need to interface it with the BOE since it is at 5v?
> Help
>
> Kevin
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
Regarding case 2, it is intrinsic to the IRL520. Diode is built in to the
IRL520, anode to source and cathode to drain.
Case 1 is the prefered method IMHO
Ken\
The no brainer solution is almost there but left off what I believe to
be one critical component to prevent the inductive kick from the
solonoid coil from killing your MOSFET. You need to add a garden
variety power diode (ie, 1N4001....4005) reverse biased across the
solonoid coil, or from drain to source.
Case 1: diode anode to Drain, cathode to +12Volts
or
Case 2: diode anote to (source)ground, diode cathode to Drain
Either one should keep your MOSFET from going west the first time you
release the solonoid.
Call this the "brainer" solution. Actually, it comes from years of
experience. Have fun.
Horace
[noparse][[/noparse]Non-text portions of this message have been removed]
Looks like I spoke too quickly. I just looked up specs for the IRL520
MOSFET and found that they have already built in the diode (case2)
right into the FET so that you don't need to add an external one. In
the old days, to go without the diode was circuit suicide, but it is
becoming much more common to see them added internal to the device
itself as a self protection feature. I found specs at:
http://www.fairchildsemi.com/ds/IR/IRL520A.pdf
The reason for the diode is as I stated. It gives the current in the
solonoid coil a place to go once you turn off the FET. Remember, laws
of physics says you can't instantly change current through an inductor
(the coil). This gives the current a path throught the diode and lets
it drop gradually to zero without developing a giant reverse voltage
spike that can damage devices. Anyway, score 1 for no-brainer!
Horace
--- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> Kevin,
> The no brainer solution is almost there but left off what I believe to
> be one critical component to prevent the inductive kick from the
> solonoid coil from killing your MOSFET. You need to add a garden
> variety power diode (ie, 1N4001....4005) reverse biased across the
> solonoid coil, or from drain to source.
>
> Case 1: diode anode to Drain, cathode to +12Volts
> or
> Case 2: diode anote to (source)ground, diode cathode to Drain
>
> Either one should keep your MOSFET from going west the first time you
> release the solonoid.
>
> Call this the "brainer" solution. Actually, it comes from years of
> experience. Have fun.
>
> Horace
>
> --- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> > I am SURE someplace in one of the parallax tutorials this is
> covered.....In
> > the mean time a no brainer solution is get a MOSFET......IRL520.
> >
> > Connect stamp output directly to the GATE
> > Connect 1 meg from the GATE to ground
> > Connect the SOURCE to ground
> > Connect the DRAIN to the solenoid minus terminal
> > Connect the solenoid positive terminal to 12 volts
> > DONE.......overkill but DONE....ie....no brainer
> >
> > see www.glitchbuster.com
> > I am not affiliated with glitch buster at all, but inexpensive
> shipping.
> >
> > ken
> >
> >
> > Hi
> > I am new to all of this and I want to use a BS2 to control a
> solenoid valve
> > at
> > 12v.
> > What do I need to interface it with the BOE since it is at 5v?
> > Help
> >
> > Kevin
> >
> >
> > [noparse][[/noparse]Non-text portions of this message have been removed]
Thanks for all the info.
Kevin
--- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> Kevin, Ken,
>
> Looks like I spoke too quickly. I just looked up specs for the IRL520
> MOSFET and found that they have already built in the diode (case2)
> right into the FET so that you don't need to add an external one. In
> the old days, to go without the diode was circuit suicide, but it is
> becoming much more common to see them added internal to the device
> itself as a self protection feature. I found specs at:
>
> http://www.fairchildsemi.com/ds/IR/IRL520A.pdf
>
> The reason for the diode is as I stated. It gives the current in the
> solonoid coil a place to go once you turn off the FET. Remember, laws
> of physics says you can't instantly change current through an inductor
> (the coil). This gives the current a path throught the diode and lets
> it drop gradually to zero without developing a giant reverse voltage
> spike that can damage devices. Anyway, score 1 for no-brainer!
>
> Horace
>
>
> --- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> > Kevin,
> > The no brainer solution is almost there but left off what I believe to
> > be one critical component to prevent the inductive kick from the
> > solonoid coil from killing your MOSFET. You need to add a garden
> > variety power diode (ie, 1N4001....4005) reverse biased across the
> > solonoid coil, or from drain to source.
> >
> > Case 1: diode anode to Drain, cathode to +12Volts
> > or
> > Case 2: diode anote to (source)ground, diode cathode to Drain
> >
> > Either one should keep your MOSFET from going west the first time you
> > release the solonoid.
> >
> > Call this the "brainer" solution. Actually, it comes from years of
> > experience. Have fun.
> >
> > Horace
> >
> > --- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> > > I am SURE someplace in one of the parallax tutorials this is
> > covered.....In
> > > the mean time a no brainer solution is get a MOSFET......IRL520.
> > >
> > > Connect stamp output directly to the GATE
> > > Connect 1 meg from the GATE to ground
> > > Connect the SOURCE to ground
> > > Connect the DRAIN to the solenoid minus terminal
> > > Connect the solenoid positive terminal to 12 volts
> > > DONE.......overkill but DONE....ie....no brainer
> > >
> > > see www.glitchbuster.com
> > > I am not affiliated with glitch buster at all, but inexpensive
> > shipping.
> > >
> > > ken
> > >
> > >
> > > Hi
> > > I am new to all of this and I want to use a BS2 to control a
> > solenoid valve
> > > at
> > > 12v.
> > > What do I need to interface it with the BOE since it is at 5v?
> > > Help
> > >
> > > Kevin
> > >
> > >
> > > [noparse][[/noparse]Non-text portions of this message have been removed]
My first question is what is the current ? AC or DC ?
All the responses have been for DC solenoids.
Second, is the resistance of the coil of the unit ?
I have some 1.5 watt solenoids. 12 volts, 1.5 watts is near 700 mA
and is way too much for a PN2222.
I have relays that pull closer to 200mA.
Also, depending on how often you change state of the coil, a coil
for a solenoid or relay will use one current to operate and another
to hold. Typically, half the rating is needed to hold the coil in
posistion. Overheating of the semi may occur over time, but for
short bursts a lower rated device might get you by.
Here you are subject to manufacturinrs claims and spec sheets. One
may rate the coil for holding current, another for actuation current.
I've been successful on temporary project to use the 2222 for much
larger coils than they should handle, but would use a higher rated
MOSFET if putting out a full circuit of more than just testing.
Dave
--- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> Kevin, Ken,
>
> Looks like I spoke too quickly. I just looked up specs for the
IRL520
> MOSFET and found that they have already built in the diode (case2)
> right into the FET so that you don't need to add an external one. In
> the old days, to go without the diode was circuit suicide, but it is
> becoming much more common to see them added internal to the device
> itself as a self protection feature. I found specs at:
>
> http://www.fairchildsemi.com/ds/IR/IRL520A.pdf
>
> The reason for the diode is as I stated. It gives the current in the
> solonoid coil a place to go once you turn off the FET. Remember,
laws
> of physics says you can't instantly change current through an
inductor
> (the coil). This gives the current a path throught the diode and
lets
> it drop gradually to zero without developing a giant reverse voltage
> spike that can damage devices. Anyway, score 1 for no-brainer!
>
> Horace
>
>
> --- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> > Kevin,
> > The no brainer solution is almost there but left off what I
believe to
> > be one critical component to prevent the inductive kick from the
> > solonoid coil from killing your MOSFET. You need to add a garden
> > variety power diode (ie, 1N4001....4005) reverse biased across the
> > solonoid coil, or from drain to source.
> >
> > Case 1: diode anode to Drain, cathode to +12Volts
> > or
> > Case 2: diode anote to (source)ground, diode cathode to Drain
> >
> > Either one should keep your MOSFET from going west the first time
you
> > release the solonoid.
> >
> > Call this the "brainer" solution. Actually, it comes from years of
> > experience. Have fun.
> >
> > Horace
> >
> > --- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> > > I am SURE someplace in one of the parallax tutorials this is
> > covered.....In
> > > the mean time a no brainer solution is get a MOSFET......IRL520.
> > >
> > > Connect stamp output directly to the GATE
> > > Connect 1 meg from the GATE to ground
> > > Connect the SOURCE to ground
> > > Connect the DRAIN to the solenoid minus terminal
> > > Connect the solenoid positive terminal to 12 volts
> > > DONE.......overkill but DONE....ie....no brainer
> > >
> > > see www.glitchbuster.com
> > > I am not affiliated with glitch buster at all, but inexpensive
> > shipping.
> > >
> > > ken
> > >
> > >
> > > Hi
> > > I am new to all of this and I want to use a BS2 to control a
> > solenoid valve
> > > at
> > > 12v.
> > > What do I need to interface it with the BOE since it is at 5v?
> > > Help
> > >
> > > Kevin
> > >
> > >
> > > [noparse][[/noparse]Non-text portions of this message have been removed]
the solenoid valve is 12v dc and says watt rating 6.9/F
made by www.ascovalve.com
part U8225B2V/DC
Thanks
Kevin
--- In basicstamps@yahoogroups.com, "Dave Mucha" <davemucha@j...> wrote:
> Hi Kevin,
>
> My first question is what is the current ? AC or DC ?
>
> All the responses have been for DC solenoids.
>
> Second, is the resistance of the coil of the unit ?
>
> I have some 1.5 watt solenoids. 12 volts, 1.5 watts is near 700 mA
> and is way too much for a PN2222.
>
> I have relays that pull closer to 200mA.
>
> Also, depending on how often you change state of the coil, a coil
> for a solenoid or relay will use one current to operate and another
> to hold. Typically, half the rating is needed to hold the coil in
> posistion. Overheating of the semi may occur over time, but for
> short bursts a lower rated device might get you by.
>
> Here you are subject to manufacturinrs claims and spec sheets. One
> may rate the coil for holding current, another for actuation current.
>
> I've been successful on temporary project to use the 2222 for much
> larger coils than they should handle, but would use a higher rated
> MOSFET if putting out a full circuit of more than just testing.
>
> Dave
>
>
>
>
>
>
> --- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> > Kevin, Ken,
> >
> > Looks like I spoke too quickly. I just looked up specs for the
> IRL520
> > MOSFET and found that they have already built in the diode (case2)
> > right into the FET so that you don't need to add an external one. In
> > the old days, to go without the diode was circuit suicide, but it is
> > becoming much more common to see them added internal to the device
> > itself as a self protection feature. I found specs at:
> >
> > http://www.fairchildsemi.com/ds/IR/IRL520A.pdf
> >
> > The reason for the diode is as I stated. It gives the current in the
> > solonoid coil a place to go once you turn off the FET. Remember,
> laws
> > of physics says you can't instantly change current through an
> inductor
> > (the coil). This gives the current a path throught the diode and
> lets
> > it drop gradually to zero without developing a giant reverse voltage
> > spike that can damage devices. Anyway, score 1 for no-brainer!
> >
> > Horace
> >
> >
> > --- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> > > Kevin,
> > > The no brainer solution is almost there but left off what I
> believe to
> > > be one critical component to prevent the inductive kick from the
> > > solonoid coil from killing your MOSFET. You need to add a garden
> > > variety power diode (ie, 1N4001....4005) reverse biased across the
> > > solonoid coil, or from drain to source.
> > >
> > > Case 1: diode anode to Drain, cathode to +12Volts
> > > or
> > > Case 2: diode anote to (source)ground, diode cathode to Drain
> > >
> > > Either one should keep your MOSFET from going west the first time
> you
> > > release the solonoid.
> > >
> > > Call this the "brainer" solution. Actually, it comes from years of
> > > experience. Have fun.
> > >
> > > Horace
> > >
> > > --- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> > > > I am SURE someplace in one of the parallax tutorials this is
> > > covered.....In
> > > > the mean time a no brainer solution is get a MOSFET......IRL520.
> > > >
> > > > Connect stamp output directly to the GATE
> > > > Connect 1 meg from the GATE to ground
> > > > Connect the SOURCE to ground
> > > > Connect the DRAIN to the solenoid minus terminal
> > > > Connect the solenoid positive terminal to 12 volts
> > > > DONE.......overkill but DONE....ie....no brainer
> > > >
> > > > see www.glitchbuster.com
> > > > I am not affiliated with glitch buster at all, but inexpensive
> > > shipping.
> > > >
> > > > ken
> > > >
> > > >
> > > > Hi
> > > > I am new to all of this and I want to use a BS2 to control a
> > > solenoid valve
> > > > at
> > > > 12v.
> > > > What do I need to interface it with the BOE since it is at 5v?
> > > > Help
> > > >
> > > > Kevin
> > > >
> > > >
> > > > [noparse][[/noparse]Non-text portions of this message have been removed]
> HI Dave
> the solenoid valve is 12v dc and says watt rating 6.9/F
> made by www.ascovalve.com
> part U8225B2V/DC
> Thanks
> Kevin
12VDC @ 7 watts is 580mA or a tad too high for a PN2222 with a 500mA
rating.
For testing (while waiting for the MOSFETS to arrive) I would use a
PN2222.
for a final curcuit, use the MOSFETS listed or even a TIP120 (122?)
that also has an internal diode.
Dave
>
> --- In basicstamps@yahoogroups.com, "Dave Mucha" <davemucha@j...>
wrote:
> > Hi Kevin,
> >
> > My first question is what is the current ? AC or DC ?
> >
> > All the responses have been for DC solenoids.
> >
> > Second, is the resistance of the coil of the unit ?
> >
> > I have some 1.5 watt solenoids. 12 volts, 1.5 watts is near 700
mA
> > and is way too much for a PN2222.
> >
> > I have relays that pull closer to 200mA.
> >
> > Also, depending on how often you change state of the coil, a
coil
> > for a solenoid or relay will use one current to operate and
another
> > to hold. Typically, half the rating is needed to hold the coil
in
> > posistion. Overheating of the semi may occur over time, but for
> > short bursts a lower rated device might get you by.
> >
> > Here you are subject to manufacturinrs claims and spec sheets.
One
> > may rate the coil for holding current, another for actuation
current.
> >
> > I've been successful on temporary project to use the 2222 for
much
> > larger coils than they should handle, but would use a higher
rated
> > MOSFET if putting out a full circuit of more than just testing.
> >
> > Dave
> >
> >
> >
> >
> >
> >
> > --- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> > > Kevin, Ken,
> > >
> > > Looks like I spoke too quickly. I just looked up specs for the
> > IRL520
> > > MOSFET and found that they have already built in the diode
(case2)
> > > right into the FET so that you don't need to add an external
one. In
> > > the old days, to go without the diode was circuit suicide, but
it is
> > > becoming much more common to see them added internal to the
device
> > > itself as a self protection feature. I found specs at:
> > >
> > > http://www.fairchildsemi.com/ds/IR/IRL520A.pdf
> > >
> > > The reason for the diode is as I stated. It gives the current
in the
> > > solonoid coil a place to go once you turn off the FET.
Remember,
> > laws
> > > of physics says you can't instantly change current through an
> > inductor
> > > (the coil). This gives the current a path throught the diode
and
> > lets
> > > it drop gradually to zero without developing a giant reverse
voltage
> > > spike that can damage devices. Anyway, score 1 for no-brainer!
> > >
> > > Horace
> > >
> > >
> > > --- In basicstamps@yahoogroups.com, "xibm65" <cce@t...> wrote:
> > > > Kevin,
> > > > The no brainer solution is almost there but left off what I
> > believe to
> > > > be one critical component to prevent the inductive kick from
the
> > > > solonoid coil from killing your MOSFET. You need to add a
garden
> > > > variety power diode (ie, 1N4001....4005) reverse biased
across the
> > > > solonoid coil, or from drain to source.
> > > >
> > > > Case 1: diode anode to Drain, cathode to +12Volts
> > > > or
> > > > Case 2: diode anote to (source)ground, diode cathode to Drain
> > > >
> > > > Either one should keep your MOSFET from going west the first
time
> > you
> > > > release the solonoid.
> > > >
> > > > Call this the "brainer" solution. Actually, it comes from
years of
> > > > experience. Have fun.
> > > >
> > > > Horace
> > > >
> > > > --- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> > > > > I am SURE someplace in one of the parallax tutorials this is
> > > > covered.....In
> > > > > the mean time a no brainer solution is get a
MOSFET......IRL520.
> > > > >
> > > > > Connect stamp output directly to the GATE
> > > > > Connect 1 meg from the GATE to ground
> > > > > Connect the SOURCE to ground
> > > > > Connect the DRAIN to the solenoid minus terminal
> > > > > Connect the solenoid positive terminal to 12 volts
> > > > > DONE.......overkill but DONE....ie....no brainer
> > > > >
> > > > > see www.glitchbuster.com
> > > > > I am not affiliated with glitch buster at all, but
inexpensive
> > > > shipping.
> > > > >
> > > > > ken
> > > > >
> > > > >
> > > > > Hi
> > > > > I am new to all of this and I want to use a BS2 to control a
> > > > solenoid valve
> > > > > at
> > > > > 12v.
> > > > > What do I need to interface it with the BOE since it is at
5v?
> > > > > Help
> > > > >
> > > > > Kevin
> > > > >
> > > > >
> > > > > [noparse][[/noparse]Non-text portions of this message have been removed]