[misterhouse-users] Power Requirements

[Thomaz G. <tg...@es...>]

A question for anyone;  How many temp. sensors is the norm for a bus.  My 
question is prompted by the parasitic power scheme those things can use.  Not 
having to worry about a power bus or supply is a *very* attractive feature, 
but exactly how viable is it?  By that, I mean how many devices can you 
expect to reliably operate using the parasitic mode?  I'm also thinking of a 
wire run of 250 feet maximum, with maybe 8 sensors.  One of the local fellows 
tells me that I should not rely on the parasitic mode at all.  He says I 
should plan to include a power bus or plan for external power at the remote 
site.  I'm looking for something I can "install and forget".  Reduced 
complexity (no external power) would be a real plus, but I'm also concerned 
with reliability...

Thanks for any ideas/thoughts or experiences with this stuff...

-- 

Tom Gunn  WD4JQX
tg...@es...


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	 From the shallow end of the gene pool...