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I think the one Mark has is actually 2-3 boards with a
relay and power regulator added. It may indeed included the $72 board as a
component. Personally, for our needs I think the $72 board is a much more
cost effective buy. All you need to add is an LED and capacitor (to
stretch the pulse output) and a voltage source of approx 5 volts (or a resistor
to reduce it to 5 volts).
Vdc (5 to 12 volts) to the LED (perhaps through a
resistor to reduce current to an acceptable level for the LED), the
negative leg of the LED to Output #3 (collector of transistor) and then the
capacitor mentioned in the specs to stretch the pulse so the LED will illuminate
brighter. Some LEDs will operate with 12 Volts but most need a resistor to
drop the voltage to around 2.5-3 volts across the LED with 20-25ma current
draw.
Ed
----- Original Message -----
Sent: Saturday, February 25, 2006 10:58
AM
Subject: [FlyRotary] Re: Fire Detector
Unit
All,
This appears to be the same product that Mark has......Wonder why
such a
price difference !!
--
Kelly Troyer
Dyke
Delta/13B/RD1C/EC2
--------------
Original message from Bob White <rlwhite@comcast.net>:
--------------
> On Sat, 25 Feb 2006 07:04:37 -0500
>
Chad Robinson 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
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