Mark, it is a good move to go to thick wall tubes. I'm just
concerned
     with the heat expansion between the tubes?
     I like your fire detector. It was amazing to watch it work at
Bill's
     place. How do I get one ? :)
     Buly


Hi Buly,
I contacted the company I bought the boards from to check on a volume
purchase and they told me that they could supply more but the price
would be higher.  They said that the board I purchased was old stock
left over from a previous run.  It was a robotics supplier, but I don't
recall the name, but I can look through my files to see if I can locate
their url.  The "eye" of the unit is called a UVtron sensor.  I think it
is manufactured by a Japanese firm.  Do a Google search for that and see
what turns up.  The UVtron sensor is about $50 by itself.  I have it
hooked up to a big red LED at the top of my panel.  Hope I never see it
lit up while I'm in the air.
Mark S

I found it. Here is screen shot.
  http://www.acroname.com/robotics/parts/R67-UVTRON.html

Paul Lamar


Yes, that's the one.  It doesn't give the input voltage, but I think it
is 5v, so you'll need a voltage regulator.  The PICKAXE suppliers have a
neat little voltage regulator for $3.50.  I bought two.

Mark S



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