I think everyone is missing my point... I was hesistant to say I was
connecting +5 to Gnd because then I would get the "use a transistor"
message.  And a real relay is great, but I don't like the extra hardware
involved, I'm looking for something simple, all I'm doing is shorting
leads!

I would think there would be some kind of solid state relay that can do
this but apparently not?

nick@veys.com | www.veys.com/nick

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Roman Black
> Sent: Thursday, August 02, 2001 2:19 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: Solid state relay difficulty
>
>
> Mike Mansheim wrote:
> >
> > > Have you considered a relay? A "real" relay that
> > > is! :o) Simple to drive with your PIC and should
> > > work your AC fan load ok since you say it is low
> > > power.
> >
> > Last time I went looking for a relay to run with a pic,
> > I ended up using a solid state relay because the
> > mechanical relays needed more drive current than the
> > pic could do directly.  Of course, I limited my selection
> > to whatever was listed in Digikey.
> > So, does a solid state relay count as "real"?
>
> No. :o)
> Try using a real relay with the coil driven by
> a cheap 10 cent transistor like a BC337 or equiv,
> and a diode across the relay coil, this can give
> advantages over a solid state relay because of
> the total isolation of the relay contacts from
> the coil and PIC.
>
> Solid state relays are fine in many cases, but
> "real" relays have their place, and are good
> safe hardware for newbies.
> -Roman
>
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>
>
>

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