| Posted: Sunday Jul 19th, 2015 11:16 pm |
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Swiss-Toni
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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)
Attachment: 20150719_115309.jpg (Downloaded 67 times)
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| Posted: Sunday Jul 19th, 2015 11:16 pm |
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| Posted: Sunday Jul 19th, 2015 11:17 pm |
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| Posted: Sunday Jul 19th, 2015 11:17 pm |
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| Posted: Sunday Jul 19th, 2015 11:18 pm |
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| Posted: Sunday Jul 19th, 2015 11:18 pm |
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| Posted: Sunday Jul 19th, 2015 11:19 pm |
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| Posted: Sunday Jul 19th, 2015 11:19 pm |
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| Posted: Monday Jul 20th, 2015 07:20 am |
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admin
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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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| Posted: Monday Jul 20th, 2015 03:05 pm |
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Swiss-Toni
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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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| Posted: Monday Jul 20th, 2015 04:48 pm |
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admin
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Will there be a problem due to the angle of coverage being very narrow? You would need to be directly under it to be detected
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| Posted: Tuesday Jul 21st, 2015 12:14 pm |
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Swiss-Toni
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The angle of the beam is only determined by the depth of the pir in the housing and this is easily adjusted just push it to the depth required. The overall idea of this was to reduce the dispersion field to stop activations unnecessarily. These sensors are more in tune with walking past rather than walking under (for my purposes) to use as a walk under the dome of the sensor would be adjusted fully out giving a wide dispersion field. Last edited on Tuesday Jul 21st, 2015 02:34 pm by Swiss-Toni
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| Posted: Thursday Jul 23rd, 2015 08:03 pm |
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tman
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Using the output of the module to drive a mini relay with NC contacts would mean you can use the zone inputs like normal. Last edited on Thursday Jul 23rd, 2015 08:06 pm by tman
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| Posted: Friday Jul 24th, 2015 03:36 am |
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Swiss-Toni
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It does not require a relay to drive comfort , comfort just has to be programmed as digital on that particular sensor/zone and it works as it should, it just didn't work under normal PIR parameters N/O or N/C. That seems to be the requirement of the module their is no need for any further relays etc in fact the power requirement could also be taken direct from comfort considering it only uses (12V) <60uA
The point I was trying to make is that it maybe an idea that Comfort should take up and manufacture as I see a potential for this in the market place for home automation & security systems.
Last edited on Friday Jul 24th, 2015 08:17 pm by Swiss-Toni
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| Posted: Friday Jul 24th, 2015 05:42 pm |
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We would need to find a better source of the miniature PIRs. The parts from eBay may not be a long term source.
Do others find this product useful for Comfort?
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| Posted: Friday Jul 24th, 2015 08:48 pm |
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Swiss-Toni
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Not sure who manufactures them I only bought them as I could not buy what I required and adapted to suit the installation i really don't have any idea where else to get this sort of equipment from, its not the most cost effective method for me to make these as I'm sure it could be done a lot better by a company like Cytech.
It may be a an idea to do poll and see if it would be popular or if their would be a demand for it.
The size element and installation make it unique at the present time as I have been unable to find anything like it. Also the advantage of where it can be situated and what it is used for make an ideal tool for various applications.
I will try to refine the design a bit more making it smaller and with a slightly different edged finish depending on the availability of different parts for the design also after looking at what has been said I think there should be two types wide and narrow dispersion field. (looking at getting it down to 14mm from 16mm)
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| Posted: Friday Jul 24th, 2015 10:34 pm |
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juwi_uk
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They look nice, the challenge though is being able to get wiring/power to them I guess.
JulianLast edited on Friday Jul 24th, 2015 10:35 pm by juwi_uk
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| Posted: Saturday Jul 25th, 2015 01:17 pm |
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Swiss-Toni
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juwi_uk wrote: They look nice, the challenge though is being able to get wiring/power to them I guess.
Julian
Hi Julian
You have made me look at an area regarding wiring (so far it has not been a problem for me) but if they are fitted into a wall, plaster on brick there certainly would be an issue with fitting. (I am going to do this on an external wall to try it out in the near future, if you want I will let you know how this goes)
However I have so far fitted only to staircase and a ceiling and they fit snugly and wiring is very basic. I would have to say that they would only be suitable for drywall and timber. If you think about it with this design you can place them in the ceiling above window rather than wall mounted (just an idea)
The wiring is almost the same as any basic PIR + - & trigger, the connection is standard Dupont crimps on the sensor terminal and i used cat cable for the run.
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