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Re: Connecting PIR's to an X-10 Controller
On Tuesday, June 01, 1999 10:10 AM, Steve Morgan
[SMTP:steve@xxxxxxx] wrote:
> Thanks, Keith.
> I had a feeling you'd come up with the answer.
>
> I'm going to use opto-isolators, as you've suggested,
with
> status LEDs.
> I'll change to resistors for 560R, as I reckon this
should
> give me just
> under 16mA open, 22mA closed (I think that makes the
power
> dissipation
> just over 0.26w, so I'll use 0.6w, sound OK?). I'll have
> to do some
> closer examination of the controller now, as I've got to
> make sure I
> connect the transistor the right way (I was taking the
> easy route using
> relays!).
>
Sounds fine to me. Getting the transistor backwards wont do
any damage..... it just wont work !!
> I thought I'd put it all in a nice box (including the
> controller) with a
> decent PSU and 5-pin DIN connectors for the sensors. I'll
> wire to
> provide power and allow NO or NC contacts so I've got
that
> bit more
> flexibility.
>
Have you seen one of my other interface designs???
I built a box to provide Radio Station style Fader start on
a disco mixer about 3 years ago.
That had a relay for each channel and was connected to the
outside world via 5 pin DIN.
+12v and ground and 3 pins for the relay. Common,NO,NC. I
could use just the contact if I was wiring across a switch
but if I needed opto isolators for interfacing Icould use
the contact to switch the 12 volt supply.
what was that they said about great minds :-)))
> I'll let you know how I get on.
Good luck,
Dont forget to take a few pictures and post them on your
website.
Keith
Keith Doxey
http://www.btinternet.com/~krazy.keith
Krazy Keith's World of DIY Home Automation
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