[TriEmbed] TriEmbed Digest, Vol 11, Issue 26
Martin Brooke
martin.brooke at duke.edu
Wed Apr 30 12:14:16 CDT 2014
Does anybody have a good link for easiest to implement wakeable low power
state of the common devices, R-pi, Arduino, others?
Coding an imp in Squirrel seems a lot of trouble. Getting a UPS or just a 12V
UPS battery<http://www.amazon.com/dp/B002CILA66/ref=pe_385040_30332190_TE_3p_M3T1_ST1_dp_1>and
an efficient 12V
to 5V converter<http://www.amazon.com/dp/B00CXKBJI2/ref=pe_385040_30332190_TE_M3T1_ST1_dp_1>may
be all you need if there is to be no power cord.
I have been playing with Arduino Yun's lately and would appreciate any
input on low power wakeable states for those too.
On Wed, Apr 30, 2014 at 1:00 PM, <triembed-request at triembed.org> wrote:
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> Today's Topics:
>
> 1. Re: Camera Advice (Tom Billman)
> 2. Re: Camera Advice (Rodney Radford)
>
>
> ---------- Forwarded message ----------
> From: Tom Billman <tbillman at gmail.com>
> To: Ted Pudlik <tpudlik at gmail.com>
> Cc: triembed at triembed.org
> Date: Wed, 30 Apr 2014 05:22:09 -0400
> Subject: Re: [TriEmbed] Camera Advice
> Hi Ted,
>
> Thanks for the post. What problem domain are you really attempting to
> solve ? The photo, cute bird by the way and thanks for naming it,
> indicates your feeder is well within reach of a power cord. A Pi plus a UPS
> solves your power issues, costs next to nothing, and takes no time to
> implement.
>
> The imp looks pretty interesting, Thx for the link.
>
> Now a remote setup does have all of the power issues you mention. That
> situation begs the question of "how remote" ? Too far for WiFi, etc...
>
> IMHO, these are all great questions. There's nothing wrong spending time
> and money on these real-world puzzles. Much better than watching TV (again
> IMHO). Enjoy the journey!
>
> I am interested in low-power sensor networks. Also, I would consider
> reflowing some Electric Imp modules on a custom PCB board if people are
> interested.
>
> Best regards,
>
> Tom
>
>
>
>
>
>
>
> On Mon, Apr 28, 2014 at 1:32 AM, Ted Pudlik <tpudlik at gmail.com> wrote:
>
>> Hello,
>>
>> I'm working on a system for my bird feeder that would detect birds, take
>> photos of them and put these photos up online. I assembled a working
>> prototype using a Raspberry Pi (with a WiFi dongle), a passive IR sensor
>> and a Logitech webcam, but it suffers from two drawbacks:
>>
>> 1. The power consumption of the Pi is too large to permit long-term
>> operation on battery or solar power, restricting installation options.
>> 2. The image quality leaves a lot to be desired. (Here's an example
>> picture<https://www.dropbox.com/s/bdqquj6um0vluyg/Carolina_Chickadee.jpg>
>> .)
>>
>> To solve issue 1 while keeping WiFi connectivity easy, I'm looking into
>> replacing the Pi with an electric imp <https://electricimp.com/>. I'm
>> not sure what to do about the camera, though. Adafruit sells a camera
>> accessible via serial port <https://www.adafruit.com/products/397> that can
>> be made to work with the imp<http://forums.electricimp.com/discussion/comment/5824#Comment_5824>,
>> but capturing quality stills is not its strength. The excellent built-in
>> iPhone cameras can be bought surprisingly cheaply on eBay<http://www.ebay.com/itm/Replacement-Rear-Facing-Camera-for-iphone5s-/281316823054?pt=US_Other_Cell_Phone_Accessories&hash=item417fca100e>,
>> but I'm not sure how to get them to talk to anything other than an iPhone.
>> Another possibility might be buying and cannibalizing a cheap digital
>> camera<http://www.amazon.com/Kodak-Easyshare-Digital-Camera-Silver/dp/B003VTZE1M/ref=sr_1_2?ie=UTF8&qid=1398662318&sr=8-2&keywords=digital+camera>,
>> but again I don't know if the modules inside could be interfaced with a
>> standard microcontroller.
>>
>> What would you recommend? What's the best way to get a reasonably priced
>> camera that takes high quality stills and can be easily controlled through
>> a standard bus?
>>
>> Thank you for your help!
>> Ted
>>
>> _______________________________________________
>> Triangle, NC Embedded Computing mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> TriEmbed web site: http://TriEmbed.org
>>
>>
>
>
> --
> Tom Billman
>
>
>
> ---------- Forwarded message ----------
> From: Rodney Radford <ncgadgetry at gmail.com>
> To: tpudlik at gmail.com
> Cc: TriEmbed Discussion <triembed at triembed.org>
> Date: Wed, 30 Apr 2014 06:47:48 -0400
> Subject: Re: [TriEmbed] Camera Advice
> Ted, a couple comments on your first post.
>
> Have you tried using the RPi camera? I tried a couple of webcams and was
> unhappy with them on the RPi - either the resolution was not good enough,
> or the data stream was too high for the PI's USB bus. The RPi camera
> really works great and you should definitely give that a try.
>
> As for the power being too much for a solar cell, I have an RPi now that
> is solar powered and it is working fine for me. You just need to have the
> solar cell first charge a batter and then run the RPi from the battery.
> This allows you to work through periods of no/low sun and changes the
> requirement to having a solar cell whose average power exceeds that of the
> RPi (plus the loss to battery and charger).
>
>
>
> On Wed, Apr 30, 2014 at 5:22 AM, Tom Billman <tbillman at gmail.com> wrote:
>
>> Hi Ted,
>>
>> Thanks for the post. What problem domain are you really attempting to
>> solve ? The photo, cute bird by the way and thanks for naming it,
>> indicates your feeder is well within reach of a power cord. A Pi plus a UPS
>> solves your power issues, costs next to nothing, and takes no time to
>> implement.
>>
>> The imp looks pretty interesting, Thx for the link.
>>
>> Now a remote setup does have all of the power issues you mention. That
>> situation begs the question of "how remote" ? Too far for WiFi, etc...
>>
>> IMHO, these are all great questions. There's nothing wrong spending time
>> and money on these real-world puzzles. Much better than watching TV (again
>> IMHO). Enjoy the journey!
>>
>> I am interested in low-power sensor networks. Also, I would consider
>> reflowing some Electric Imp modules on a custom PCB board if people are
>> interested.
>>
>> Best regards,
>>
>> Tom
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Apr 28, 2014 at 1:32 AM, Ted Pudlik <tpudlik at gmail.com> wrote:
>>
>>> Hello,
>>>
>>> I'm working on a system for my bird feeder that would detect birds, take
>>> photos of them and put these photos up online. I assembled a working
>>> prototype using a Raspberry Pi (with a WiFi dongle), a passive IR sensor
>>> and a Logitech webcam, but it suffers from two drawbacks:
>>>
>>> 1. The power consumption of the Pi is too large to permit long-term
>>> operation on battery or solar power, restricting installation options.
>>> 2. The image quality leaves a lot to be desired. (Here's an example
>>> picture<https://www.dropbox.com/s/bdqquj6um0vluyg/Carolina_Chickadee.jpg>
>>> .)
>>>
>>> To solve issue 1 while keeping WiFi connectivity easy, I'm looking into
>>> replacing the Pi with an electric imp <https://electricimp.com/>. I'm
>>> not sure what to do about the camera, though. Adafruit sells a camera
>>> accessible via serial port <https://www.adafruit.com/products/397> that can
>>> be made to work with the imp<http://forums.electricimp.com/discussion/comment/5824#Comment_5824>,
>>> but capturing quality stills is not its strength. The excellent built-in
>>> iPhone cameras can be bought surprisingly cheaply on eBay<http://www.ebay.com/itm/Replacement-Rear-Facing-Camera-for-iphone5s-/281316823054?pt=US_Other_Cell_Phone_Accessories&hash=item417fca100e>,
>>> but I'm not sure how to get them to talk to anything other than an iPhone.
>>> Another possibility might be buying and cannibalizing a cheap digital
>>> camera<http://www.amazon.com/Kodak-Easyshare-Digital-Camera-Silver/dp/B003VTZE1M/ref=sr_1_2?ie=UTF8&qid=1398662318&sr=8-2&keywords=digital+camera>,
>>> but again I don't know if the modules inside could be interfaced with a
>>> standard microcontroller.
>>>
>>> What would you recommend? What's the best way to get a reasonably
>>> priced camera that takes high quality stills and can be easily controlled
>>> through a standard bus?
>>>
>>> Thank you for your help!
>>> Ted
>>>
>>> _______________________________________________
>>> Triangle, NC Embedded Computing mailing list
>>> TriEmbed at triembed.org
>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>> TriEmbed web site: http://TriEmbed.org
>>>
>>>
>>
>>
>> --
>> Tom Billman
>>
>>
>> _______________________________________________
>> Triangle, NC Embedded Computing mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> TriEmbed web site: http://TriEmbed.org
>>
>>
>
> _______________________________________________
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> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>
>
--
Martin Brooke
--
*Martin Brooke*
Associate Professor,
and Philip Baugh Scholar
Department of Electrical and Computer Engineering <http://www.ee.duke.edu>
Box 90291
Duke University <http://www.duke.edu/>
Durham, NC 27708-0291
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