RE: Re: Beam Breaks - worthwhile?

[ian.bird@xxxxxxx]

I don't know to be honest. I would guess yes as there are a couple of
chips on the units but this is a plain guess.

I don't know of flat faced LEDs but a scan through the mags may show
something.

Dual beam or more is a good idea but you will need something capable of
reading the triggers in good time. I would suggest HV is not the tool for
this. 95% of the time it will be fine but it is amazing how annoying the
5% gets. When my HV is dimming a lamp it effectively ignores the input
ports for a second or so. Walk through the beam break at this point and
nothing happens. This is why my BabyPaws signal extender came about.

No wizzy invisible solutions for you that work well and the BIK thingy
still won't tell you direction.

Ian








"Kevin Hawkins" <lists@xxxxxxx>
14/08/2003 16:08
Please respond to ukha_d


To:     <ukha_d@xxxxxxx>
cc:
Subject:        RE: [ukha_d] Re: Beam Breaks - worthwhile?


Ian,



Do these Maplin kits use a modulated beam in any way ? - I ask
because I wonder if they protected against bright light in any way eg
sunlight.

I have been considering this for a while on some of my doorways, if I
could
get the cosmetics right - if there were some flat faced IR leds that would
mount flush with polished wood that would be even nicer.

I would have liked a dual beam arrangement too to try and get some
direction
indication. I am fortunate that my door entrances are typically 3 foot in
depth so I can get good spacing.

I looked once at the Phaedrus 'BeamBar' product
http://www.phaedrusltd.co.uk/system/index.html
but again cosmetically it was
not nice . I suppose I could try remounting the 8 sensors/leds. Someone
was
going to buy and evaluate one of these on this list - I forget who. ?? any
comments ??  Now that you've reminded me maybe  I'll get one to try.

I am surprised that there is not a professional solution - that looks
invisible, perhaps even similar to that loop sensor (BIM?) product you
were
playing with - someone tell me there is..



Kevin






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