Will Relays interfere w/ BS operation?

Archiver

I'm planning on driving several relays (through the proper ICs) using the BS2sx
chip.
Should the relays be mounted in a different box, or can they go in the same
metal
enclosure as the BS?

Thanks!!

Donivan

Archiver

Same box is fine. Use 10uF caps (or greater) from +V to ground on
voltages switch by the relays.

Dennis

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Original Message

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From: Donivan [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=bVZ-uvuZ1wan7Z6Srnu_HN2aTw8yfyRXmH4-ozaVQQmXhtR8vZbM7pB-RXOwvINH36BruXIC73I]burner@d...[/url
Sent: Thursday, June 12, 2003 6:48 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Will Relays interfere w/ BS operation?


I'm planning on driving several relays (through the proper ICs) using
the BS2sx chip.
Should the relays be mounted in a different box, or can they go in the
same metal
enclosure as the BS?

Thanks!!

Donivan


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Archiver

Hi,
They can be mounted in the same enclosure. Make sure to use a reverse
polarity diode across the coil to protect the driver IC. I use them even if the
IC
has its own protection. For an extra 5 cents per relay it is good insurance.

You do have to think about what you are switching worth the relay contacts.
Arcing at the contact points can lead to problems. Are you switching AC or DC
loads, lots of amps or just a few MA?
If you are switching solenoids, small induction motors, or other moderate AC
(<3 amps), use Solid State Relays. They are optically isolated and do not have
the arcing problem with the contact points.
In general keep the heavy amperage circuits separate from the Stamp power.

Hope this helps,
Alan Bradford
Plasma Technologies


[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver

Do you even need relays? check out this web site for solid state switching
that can directly switch voltages or switch relays and isolate the stamp at
the same time.
Jim
http://www.geocities.com/jimforkin2003/

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Original Message

---

From: Donivan [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=28OgJokjT8hwWTcX6zF4FYsn71VUvOmo2RH2QcUBkYo3FZIDsoHMwCrztkCk3TCW0EUA_zH5dI3NKVc]burner@d...[/url
Sent: Thursday, June 12, 2003 9:48 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Will Relays interfere w/ BS operation?


I'm planning on driving several relays (through the proper ICs) using the
BS2sx chip.
Should the relays be mounted in a different box, or can they go in the same
metal
enclosure as the BS?

Thanks!!

Donivan


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/