[OpenTRV-dev] intro

[Adrian Godwin]

Haven't fully investigated them yet, but they'd mainly need to be aimed to
ensure they had a reasonable field of view rather than to nominate a
sensitive spot. Unlike regular PIRs they don't only respond to change
(though it remains to be seen how sensitive they are).





On Mon, Sep 30, 2013 at 1:40 PM, Bo Herrmannsen <EMAIL ADDRESS HIDDEN>wrote:

>   do the cams not have to be aimed then? ie at the most likely spot?
>
> but then cieling would be the top choice... of course depends on how wide
> angle etc etc...
>
> /bo
>
>  *From:* Adrian Godwin <EMAIL ADDRESS HIDDEN>
> *Sent:* Monday, September 30, 2013 2:29 PM
> *To:* Closed list for developer discussions<EMAIL ADDRESS HIDDEN>
> *Subject:* Re: [OpenTRV-dev] intro
>
>
> The problem with Doppler is that I want to detect occupancy without
> movement, eg sleeping. This isn't easy but we're experimenting with some 16
> pixel thermal cameras. These might be able to learn environmental warmth
> and distinguish it from bodies.
> On 30 Sep 2013 12:03, "Bo Herrmannsen" <EMAIL ADDRESS HIDDEN> wrote:
>
>>   hehee
>>
>> ours are locked in a room and they keep log who has used them when... the
>> room/hall we have are at the local uni so we are not the only ones that use
>> them, hence i think i can rely on at least 2 of them up and running... its
>> makerbots 2 i think... the 3rd i forgot to note name on
>>
>> common for all 3 is that they accept a sd card... small lcd and buttons
>>
>> Hmm... about sensor... is that not only true for IR types?...
>>
>> /bo
>>
>>  *From:* Adrian Godwin <EMAIL ADDRESS HIDDEN>
>> *Sent:* Monday, September 30, 2013 11:57 AM
>> *To:* Closed list for developer discussions<EMAIL ADDRESS HIDDEN>
>> *Subject:* Re: [OpenTRV-dev] intro
>>
>>   The hackspace-owned ones have been mostly kit-built, and suffered from
>> inadequate care and over-enthusiastic fixing. It's quite a big hackspace
>> and not very easy to enforce good practice. The most reliable,
>> mechanically, was an old Stratasys but the extruder died and a replacement
>> (based on reprap components) seems to be taking a while to get completed.
>>
>> We've recently got a lulzbot that hasn't broken yet, but I wouldn't want
>> to rely on that indefinitely!
>>
>> Agreed about temperature measurement at the ceiling. Unfortunately it's
>> also the best place for a movement sensor.
>>
>>
>> On Mon, Sep 30, 2013 at 10:42 AM, Bo Herrmannsen <
>> EMAIL ADDRESS HIDDEN> wrote:
>>
>>>   Hi
>>>
>>> are the 3d printers homebrew? i was thinking that and bad build... or
>>> that people does not take enough care of them?
>>>
>>> anyways i got access to 3 3d printers... on top of that a pick&place...
>>> reflow oven as soon boards to control my toaster oven is here... last bit
>>> yet to order in a bit is a solder paste dispenser
>>>
>>> tried stencils but the setup time is prop more than it would be doing it
>>> manual... also the paste got smeared out under the stencil
>>>
>>>
>>>
>>> i know damon is playing with a sensor to detect occupancy.... but i
>>> would not place the stuff at the ceiling.... all the hot air goes up there
>>> and it would be the wrong place to messure temp... a microwave sensor and
>>> then messure at more normal hight... say arround chest hight a bit away
>>> from radiators so you dont get false readings
>>>
>>> /bo
>>>
>>>
>>>
>>>  *From:* Adrian Godwin <EMAIL ADDRESS HIDDEN>
>>> *Sent:* Friday, September 27, 2013 12:27 PM
>>> *To:* EMAIL ADDRESS HIDDEN
>>> *Subject:* [OpenTRV-dev] intro
>>>
>>>      Hi,
>>>
>>> I've just sent a join request to the list admin after seeing Damon's
>>> pitch at the Connecting Homes event. I've been looking through some of the
>>> list archives and have probably missed a few things, but am wondering if I
>>> can help out with some parts.
>>>
>>> I'm a member of London hackspace and have access to the tools there.
>>> Items that may be useful are an envronmental chamber, a laser cutter, a 3d
>>> printer and a reflow oven.
>>>
>>> It's fairly common for the 3d printer to be broken, but there's also a
>>> group based near reading who have well-developed printers, the thames
>>> valley reprap group. These might be a useful resource for getting small
>>> quantities of prints made. Given how much effort seems to be involved in
>>> keeping 3d printers working, this might be more efficient than buying the
>>> Maplin machine.
>>>
>>> I've personally got some SMD equipment - small irons, hot tweezers, hot
>>> air, microscope. I don't have reflow or paste equipment yet, though. There
>>> are a couple of people at the hackspace who have done more with stencils
>>> and dispensers.
>>>
>>>
>>> I was at the Connecting Homes even in connection with an energy-managed
>>> house project. This also requires good occupancy sensors and we're looking
>>> at a crude thermal imaging camera. We think there might be a case for
>>> making a ceiling-mounted occupancy sensor with light and temperature
>>> sensors and I'm wondering if this could share some development with your
>>> plans.
>>>
>>> -adrian
>>>
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>>
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