On Sat, 25 Feb 2006 07:04:37 -0500
Chad Robinson <crj@lucubration.com> wrote:

> Tracy Hallock wrote:
> >
> > After seeing Mark's demonstration, I was pretty impressed, so I did a
> > search on the internet for similar products.  The link below looked
> > promising:
> >  
> > http://www.georgejenson.com/rv7.php
> >  
> > They include a board and the detector for $72.  Unfortunately, I am too
> > far off from needing this yet, but someone else might like to experiment.
>
> Tracy, did you mean to include this link as opposed to the one above?
> http://www.acroname.com/robotics/parts/R67-UVTRON.html
>
> This is a good way to go if you're serious about using this detector. It runs
> on 10-30VDC, and you can get a project box from Radio Shack for a few bucks
> that will fit it.
>
> Note that if you want to use this, you will need some way to indicate its
> output. A good way would be a 12V relay, light, and buzzer, also from Radio
> Shack. You'd hook the relay to "output pin 3 - Open Collector Output", and use
> it to drive the indicator light (or LED) and the buzzer. Make sure the coil
> rating of the relay you get doesn't exceed 100mA at 12V (coil resistance 120
> ohms max).


*** Make that 120 ohms MIN.  More ohms, less current.  :)

Bob W.





>
> Finally, the output of this thing is a very short pulse. The spec sheet for
> the driver circuit says you can add a capacitor at a spot on the circuit
> board. Again, Radio Shack sells capacitors. A 1uF value across the Cx
> terminals will make the output pulse for 1 second at a time. Don't forget to
> jumper the "background cancel level" terminals, too. Looks like you'd want to
> use position 3 - they label this "general use". You can experiment with a
> different slot if it's falsely triggering.
>
> Sounds like a lot of hookup work, but you could probably do it (minus wiring
> and installing it) in 20 minutes. I'm just trying to be detailed. =)
>
>
> --
> Homepage:  http://www.flyrotary.com/
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