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Can Cytech make micro sensors
#1
I have had problems trying to work out the best use of sensors to turn lights on stair treads and wonder if it would be possible for Comfort to manufacture something that i have designed as a solution for this problem,
I thought of using a standard PIR and pressure mats and then decided to make my own using a micro pir module and a push button that I modified blending the two together (16mm button one with an illumination ring as this supports the module) . the pictures show roughly how I went about it and the only the problem that I encountered on the installation was the correct programing (It has to be set as \"digital\" as it only use a 3 wire connection) The overall diameter of the pir in its new housing pushed back to reduce activations is the size of a penny (UK) so quite small.
(Can only put one picture on at a time so will be spread over a few pages)


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#9
Interesting projectWhat is the advantage of your PIR over a conventional PIR, besides the size?
Why must you program it as \"Digital\". You should be able to use Zone Type for the PIRs eg PIR Away/Night?
We can discuss your design further if you send an email to chiu@cytech.biz
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#10
The advantages over standard PIRs is that due to the way that they are constructed and the angle of the beams it leads to unwanted activations (which can be annoying). also as you mentioned the size of the PIR that I fabricated makes it very discrete in appearance and where you can locate it.
Also by inserting the pir in the housing at a certain depth it acts more like a beam, creating a more specific activation. I am also looking at installing one of these outside down the side of the house to turn on external lights without having to use bulky pirs or beam technology which requires two parts.
The disadvantage of these PIR module is that it is limited to a 3M range for the most part that is not an issue. When I first installed I, it came up as a fault on the zone and was announced so on the keypad, it was originally linked into the PIR night/away but it would not function correctly like the normal PIR which I believe use a more analogue route. these modules use \"High 3V or Low 0V\" for activations (set at 0V) through the + - power supply. when you select digital (and plus I it set it at 50ms although that could be altered to almost anything).
another advantage with this PIR is that due to its size you drill a hole 16mm and just push the module in so very easy to fit for professionals and amateurs although the wiring and where that goes maybe be an issue but when planning that should always be taken into account…
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