Are buffers ( CMOS 4050 etc) any use to protect the stamp''s outputs???
Archiver
Posts: 46,084
Arrhid,
You can simply use resistors to control the current output from the Stamp.
If you need to pull more current then the Stamp can handle, a resistor and a
transistor work well. Another option is to use a chip like the ULN2003.
These chips have a built in current limiting resistor and spike protection
diodes. Further, outputs can be tied in parallel for greater current.
I don't know the chip you mentioned, but I don't think it's intended use is
as a current limiter, but it might work.
Jonathan
www.madlabs.info
Original Message
From: "arridh_shashank" <arridh_shashank@y...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, December 28, 2003 11:36 PM
Subject: [noparse][[/noparse]basicstamps] Are buffers ( CMOS 4050 etc) any use to protect the
stamp's outputs???
> Hey
>
> I'm not sure my self if this will work or not so I thought I'd ask
> you guys [noparse]:D[/noparse]. I wanted to protect my stamp outputs from gettin
> damaged by sourcing and sinking too much current so I looked around
> and found the cmos 4050 chip non inverting hex buffer. I was
> wondering if it will protect my stamp from sourcing and sinking a
> lot of current. What I plan to do is to use it as a intermediate
> between my stamp and my output device so as to protect the stamp.
> Would this be a benifitial setup to have and is this the use the
> chip was developed for? Furthermore will it protect my stamp from
> damage in the instance that a large base current was drawn by a
> transistor or similar instance? Any light you guys can shed on the
> subject would be helpful.
>
> Many thanks
> Arridh
>
>
>
> 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.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
>
>
You can simply use resistors to control the current output from the Stamp.
If you need to pull more current then the Stamp can handle, a resistor and a
transistor work well. Another option is to use a chip like the ULN2003.
These chips have a built in current limiting resistor and spike protection
diodes. Further, outputs can be tied in parallel for greater current.
I don't know the chip you mentioned, but I don't think it's intended use is
as a current limiter, but it might work.
Jonathan
www.madlabs.info
Original Message
From: "arridh_shashank" <arridh_shashank@y...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, December 28, 2003 11:36 PM
Subject: [noparse][[/noparse]basicstamps] Are buffers ( CMOS 4050 etc) any use to protect the
stamp's outputs???
> Hey
>
> I'm not sure my self if this will work or not so I thought I'd ask
> you guys [noparse]:D[/noparse]. I wanted to protect my stamp outputs from gettin
> damaged by sourcing and sinking too much current so I looked around
> and found the cmos 4050 chip non inverting hex buffer. I was
> wondering if it will protect my stamp from sourcing and sinking a
> lot of current. What I plan to do is to use it as a intermediate
> between my stamp and my output device so as to protect the stamp.
> Would this be a benifitial setup to have and is this the use the
> chip was developed for? Furthermore will it protect my stamp from
> damage in the instance that a large base current was drawn by a
> transistor or similar instance? Any light you guys can shed on the
> subject would be helpful.
>
> Many thanks
> Arridh
>
>
>
> 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.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
>
>