Port Protection Components
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Posts: 46,084
While trolling through the documentation on the Activity Board, I found that
the connection provided for external I/O does not have any port protection
built in. Now that I am expanding beyond my Activity Board as far as I/O, I
need some additional info on how to provide this protection. In looking at
some of the other products and stuff, it looks like they normally put a 10k
resistor in series with the port for most things. Is this correct?
the connection provided for external I/O does not have any port protection
built in. Now that I am expanding beyond my Activity Board as far as I/O, I
need some additional info on how to provide this protection. In looking at
some of the other products and stuff, it looks like they normally put a 10k
resistor in series with the port for most things. Is this correct?
Comments
opto's. This pretty much guarantees protection to the stamp. I've
actually connected (by mistake) 230v AC 50Hz to an I/P and whilst it
made the opto smoke a bit, no damage was done!
I've designed a range of plug in modules that provides any external
connections via a standard interface, relay O/P, Opto protected
transistor O/P, Opto protected I/P's, potentiometer I/P's etc.
Let me know if you want more details.
It may not be the cheapest way of protecting the STAMP but does
protect it regardless.
Jon
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> While trolling through the documentation on the Activity Board, I
found that
> the connection provided for external I/O does not have any port
protection
> built in. Now that I am expanding beyond my Activity Board as far
as I/O, I
> need some additional info on how to provide this protection. In
looking at
> some of the other products and stuff, it looks like they normally
put a 10k
> resistor in series with the port for most things. Is this correct?
employer, and I want to figure out how to set things up before I complete my
I/O board. I was gonna plug into the connector on the Activity board with a
cable and have a remote board with screw terminals, etc...
Send 'em direct to me -- daweasel@s...
Original Message
> Depends what type of protection you need, personally I only ever use
> opto's. This pretty much guarantees protection to the stamp. I've
> actually connected (by mistake) 230v AC 50Hz to an I/P and whilst it
> made the opto smoke a bit, no damage was done!
>
> I've designed a range of plug in modules that provides any external
> connections via a standard interface, relay O/P, Opto protected
> transistor O/P, Opto protected I/P's, potentiometer I/P's etc.
> Let me know if you want more details.
>
> It may not be the cheapest way of protecting the STAMP but does
> protect it regardless.
how the hell do you attach files to the Post message? I've got 4
schematics for you saved as bmp's.
Jon
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> Sure -- send it on. I have a good selection of opto-isolators from
my last
> employer, and I want to figure out how to set things up before I
complete my
> I/O board. I was gonna plug into the connector on the Activity
board with a
> cable and have a remote board with screw terminals, etc...
>
> Send 'em direct to me -- daweasel@s...
>
>
Original Message
>
>
> > Depends what type of protection you need, personally I only ever
use
> > opto's. This pretty much guarantees protection to the stamp. I've
> > actually connected (by mistake) 230v AC 50Hz to an I/P and whilst
it
> > made the opto smoke a bit, no damage was done!
> >
> > I've designed a range of plug in modules that provides any
external
> > connections via a standard interface, relay O/P, Opto protected
> > transistor O/P, Opto protected I/P's, potentiometer I/P's etc.
> > Let me know if you want more details.
> >
> > It may not be the cheapest way of protecting the STAMP but does
> > protect it regardless.
icon. This will open a browser to let you pick the file you want to attach.
You can attach all 4 to one message, but have to click on the paperclip for
each file.
Bill...
Original Message
From: "Jon" <jonm@p...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, March 09, 2001 4:03 PM
Subject: [noparse][[/noparse]basicstamps] Re: Port Protection Components
> hi Rodent,
>
> how the hell do you attach files to the Post message? I've got 4
> schematics for you saved as bmp's.
>
> Jon
>
> --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > Sure -- send it on. I have a good selection of opto-isolators from
> my last
> > employer, and I want to figure out how to set things up before I
> complete my
> > I/O board. I was gonna plug into the connector on the Activity
> board with a
> > cable and have a remote board with screw terminals, etc...
> >
> > Send 'em direct to me -- daweasel@s...
> >
> >
Original Message
> >
> >
> > > Depends what type of protection you need, personally I only ever
> use
> > > opto's. This pretty much guarantees protection to the stamp. I've
> > > actually connected (by mistake) 230v AC 50Hz to an I/P and whilst
> it
> > > made the opto smoke a bit, no damage was done!
> > >
> > > I've designed a range of plug in modules that provides any
> external
> > > connections via a standard interface, relay O/P, Opto protected
> > > transistor O/P, Opto protected I/P's, potentiometer I/P's etc.
> > > Let me know if you want more details.
> > >
> > > It may not be the cheapest way of protecting the STAMP but does
> > > protect it regardless.
>
>
>
>
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