Relay''s
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--- In basicstamps@y..., "Mark Hillier" <Mark@H...> wrote:
>
>
> > I've only just started playing around with this stuff and i'm
> > confused about how to hook up a 12v relay, its got 8 pins, 2 of
which are
> > seperated from the rest, i was able to pull up the schematics
online but i
> > have no idea how to hook this up. If required i can take a pic of
it and
> > post it.
>
> 2 pins at one end are the coil (you can measure a resistance
> between them). The other 6 are contacts and can vary in
> arrangement. Often, the middle set are the common pole and one
> side is Normall Open (NO) and the other is Normally Closed (NC).
>
> When you energize the coil, the relay will pull-in the contacts and
> the NC contacts will open and the NO contact will close.
>
> Please note that the MAX current for a Stamp pin is 20 mA source,
> 25 mA sink and most relays (even the small ones) can easily
> exceed that. In other words do NOT connect the coil of the relay
> directly to a Stamp pin. You should also use a protection diode
> (reverse-polarized) across the coil to prevent sureges from
> damaging the Stamp pin when the magnetic field in the coil
> collapses.
>
>
> Mark Hillier, VE6HVW
> President, HVW Technologies Inc.
> Canadian Distributors of Parallax Products and other Neat Stuff
> Tel: +403-730-8603 Fax: +403-730-8903
> See our NEW BASIC Stamp Prototyping tools !
> http://www.hvwtech.com/stampstack.htm
Hmm, i was planning on just hooking the relay directly into the pins.
The relays that i have are marked on the side:
0.6A 125VAC
2A 80VDC
0.6A 110VDC
so looks like there is no way the stamp will put out enough for this,
whats the alternative for hooking these up?
>
>
> > I've only just started playing around with this stuff and i'm
> > confused about how to hook up a 12v relay, its got 8 pins, 2 of
which are
> > seperated from the rest, i was able to pull up the schematics
online but i
> > have no idea how to hook this up. If required i can take a pic of
it and
> > post it.
>
> 2 pins at one end are the coil (you can measure a resistance
> between them). The other 6 are contacts and can vary in
> arrangement. Often, the middle set are the common pole and one
> side is Normall Open (NO) and the other is Normally Closed (NC).
>
> When you energize the coil, the relay will pull-in the contacts and
> the NC contacts will open and the NO contact will close.
>
> Please note that the MAX current for a Stamp pin is 20 mA source,
> 25 mA sink and most relays (even the small ones) can easily
> exceed that. In other words do NOT connect the coil of the relay
> directly to a Stamp pin. You should also use a protection diode
> (reverse-polarized) across the coil to prevent sureges from
> damaging the Stamp pin when the magnetic field in the coil
> collapses.
>
>
> Mark Hillier, VE6HVW
> President, HVW Technologies Inc.
> Canadian Distributors of Parallax Products and other Neat Stuff
> Tel: +403-730-8603 Fax: +403-730-8903
> See our NEW BASIC Stamp Prototyping tools !
> http://www.hvwtech.com/stampstack.htm
Hmm, i was planning on just hooking the relay directly into the pins.
The relays that i have are marked on the side:
0.6A 125VAC
2A 80VDC
0.6A 110VDC
so looks like there is no way the stamp will put out enough for this,
whats the alternative for hooking these up?