Relay''s
Archiver
Posts: 46,084
One of the basics is that by the ratings you listed, you have an
electromechanical relay. They use an electromagnet to change the
state of the contacts and you can expect a bounce, see bounce in the
Stamp documentation for the characteristics.
If you have this puppy connected to the same power as the stamp, you
may see switching problems. That is to say when you energize the
coil, you may see the Stamp power supply change (drop) Also, if you
are powering any high voltage/high power, make sure the Stamp power
supply is not effected.
The ratings on the side are typically maximum AC current, maximum DC
current and the maximum induction load, say for an electric motor.
Just use the ones that apply to your application.
There should be another rating and that is the coil voltage. It
might just be 24VAC on the side in letters, or printed on the coil
inside of the unit if the case is clear. you can expect from around
5 volts to 220 volts for typical relays, so you will need to get the
coil voltage to power it properly.
Dave
--- In basicstamps@y..., "Tim Goldstein" <timg@k...> wrote:
> Go to http://www.ktmarketing.com/CNC.html and select the 5th link
from the
> top titled "Parallel Port Hookup to Controller". At the bottom of
that page
> you will find an explaination and a diagram on how to use a
transistor ( a
> 2N2222 will work fine) to drive a relay. Don't forget to get a
diode also or
> you will likely pop the transistor. Just replace the term PC and
Printer
> port with Stamp.
>
> Tim
> [noparse][[/noparse]Denver, CO]
>
> >
Original Message
> > From: immolation@h... [noparse][[/noparse]mailto:immolation@h...]
> > Sent: Saturday, January 27, 2001 8:30 PM
> > To: basicstamps@y...
> > Subject: [noparse][[/noparse]basicstamps] Re: Relay's
> >
> >
> > Ok, i know absolutely nothing about transistors
I'll go pick
some
> > up tomorrow though, is there a specific rating that i should get?
And
> > am i correct in assuming that i just put them in series with the
> > relay and the stamp?
> >
> > Thanks
> >
> > --- In basicstamps@y..., "Mark Hillier" <Mark@H...> wrote:
> > >
> > > > 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
> > >
> > > These are the *contact* ratings; they have nothing to do with
the
> > > voltage or current required to operate the coil.
> > >
> > > > so looks like there is no way the stamp will put out enough
for
> > this,
> > > > whats the alternative for hooking these up?
> > >
> > > You will need to drive a transistor with the Stamp pin and have
the
> > > transistor drive the relay coil.
> > >
> > >
> > > 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
> >
> >
> >
> >
> >
electromechanical relay. They use an electromagnet to change the
state of the contacts and you can expect a bounce, see bounce in the
Stamp documentation for the characteristics.
If you have this puppy connected to the same power as the stamp, you
may see switching problems. That is to say when you energize the
coil, you may see the Stamp power supply change (drop) Also, if you
are powering any high voltage/high power, make sure the Stamp power
supply is not effected.
The ratings on the side are typically maximum AC current, maximum DC
current and the maximum induction load, say for an electric motor.
Just use the ones that apply to your application.
There should be another rating and that is the coil voltage. It
might just be 24VAC on the side in letters, or printed on the coil
inside of the unit if the case is clear. you can expect from around
5 volts to 220 volts for typical relays, so you will need to get the
coil voltage to power it properly.
Dave
--- In basicstamps@y..., "Tim Goldstein" <timg@k...> wrote:
> Go to http://www.ktmarketing.com/CNC.html and select the 5th link
from the
> top titled "Parallel Port Hookup to Controller". At the bottom of
that page
> you will find an explaination and a diagram on how to use a
transistor ( a
> 2N2222 will work fine) to drive a relay. Don't forget to get a
diode also or
> you will likely pop the transistor. Just replace the term PC and
Printer
> port with Stamp.
>
> Tim
> [noparse][[/noparse]Denver, CO]
>
> >
Original Message
> > From: immolation@h... [noparse][[/noparse]mailto:immolation@h...]
> > Sent: Saturday, January 27, 2001 8:30 PM
> > To: basicstamps@y...
> > Subject: [noparse][[/noparse]basicstamps] Re: Relay's
> >
> >
> > Ok, i know absolutely nothing about transistors
I'll go picksome
> > up tomorrow though, is there a specific rating that i should get?
And
> > am i correct in assuming that i just put them in series with the
> > relay and the stamp?
> >
> > Thanks
> >
> > --- In basicstamps@y..., "Mark Hillier" <Mark@H...> wrote:
> > >
> > > > 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
> > >
> > > These are the *contact* ratings; they have nothing to do with
the
> > > voltage or current required to operate the coil.
> > >
> > > > so looks like there is no way the stamp will put out enough
for
> > this,
> > > > whats the alternative for hooking these up?
> > >
> > > You will need to drive a transistor with the Stamp pin and have
the
> > > transistor drive the relay coil.
> > >
> > >
> > > 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
> >
> >
> >
> >
> >