[MakeLV] Arduino Cicada warning device

[Will]

Josiah, I'll write a python script when I am at work to make a lookup
table.

-Will C
On Apr 1, 2013 11:50 PM, "Josiah Ritchie" <josiah at josiahritchie.com> wrote:

> Okay Will,
>
> I need to figure out the proper values using the thermistor you suggested.
> I have found something labeled B on the datasheet, but the rest I can't.
> http://www.vishay.com/docs/29048/ntcle203.pdf I poked around an Excel
> program thing, but it looks like it doesn't have a rating for 0 Kelvin so
> I'm not sure how to get there.
>
>  * R0 is the resistance at T0 kelvin
>  * B is the NTC B parameter
>
> const float B = 3977;
> const float R0 = 50000;
> const float T0 = 298.15;
>
>
> On Mon, Apr 1, 2013 at 2:59 PM, Will <staticphantom at gmail.com> wrote:
>
>> We have thermistors in the arduino kits. Replace what you take.
>> http://www.digikey.com/product-detail/en/NTCLE203E3103HB0/BC2444-ND/2230772
>>
>> -Will C
>>
>>
>> On Mon, Apr 1, 2013 at 2:52 PM, Rob Roschewsk <rob at pabut.org> wrote:
>>
>>> you could also go this way: http://www.adafruit.com/products/374
>>>
>>> then it's just binary data .... no conversion or calibration required.
>>>
>>>
>>> On Mon, Apr 1, 2013 at 6:35 PM, Tyler Worman <tsworman at novaslp.net>wrote:
>>>
>>>> Code states it is in fact a 50k thermistor. Specifically a GE NTC 503.
>>>> They skip the calibration entirely since they thought it to be decently
>>>> accurate.
>>>>
>>>> code:
>>>> https://raw.github.com/wnyc/sensors/master/arduino/temperature/temperature.ino
>>>>
>>>>
>>>> On Mon, Apr 1, 2013 at 2:32 PM, Tyler Worman <tsworman at novaslp.net>wrote:
>>>>
>>>>> It doesn't say specifically. I quickly flipped through and see they
>>>>> build something with 50k of resistance which I presume is used as a voltage
>>>>> divider. So a 50k thermistor?
>>>>>
>>>>> Someone else want to check the diagram? I think the best photo of it
>>>>> was 29.. you can see where they hook the thermistor up at the bottom.
>>>>>
>>>>>
>>>>> On Mon, Apr 1, 2013 at 2:24 PM, Josiah Ritchie <
>>>>> josiah at josiahritchie.com> wrote:
>>>>>
>>>>>> So does the code Dave's link uses on the Arduino assume a specific
>>>>>> thermistor?
>>>>>>
>>>>>>
>>>>>> On Mon, Apr 1, 2013 at 2:08 PM, Tyler Worman <tsworman at novaslp.net>wrote:
>>>>>>
>>>>>>> The Steinhart-hart equation that can be used for calibration of
>>>>>>> thermistor and resistance isn't too bad to work through. I'd be happy to
>>>>>>> help if you have problems! We recently did it to write an Arduino based pid
>>>>>>> controller for wort heating/cooling.
>>>>>>>
>>>>>>> Some places you buy thermistors from will even give you their tested
>>>>>>> beta value which makes it even easier (beta is okay for 0 to 100c).
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Apr 1, 2013 at 1:46 PM, Will <staticphantom at gmail.com>wrote:
>>>>>>>
>>>>>>>> Thermistors are just a pain in the butt due to calibration. That's
>>>>>>>> the only issue.
>>>>>>>>
>>>>>>>> -Will C
>>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Apr 1, 2013 at 1:22 PM, Josiah Ritchie <
>>>>>>>> josiah at josiahritchie.com> wrote:
>>>>>>>>
>>>>>>>>> This might be a really fun thing to do with my kids to get them
>>>>>>>>> thinking about all sorts of science things from soil temperature to cicada
>>>>>>>>> life spans and intro to research.
>>>>>>>>>
>>>>>>>>> I could probably get away with the thermistor that came with my
>>>>>>>>> multimeter right? I'd just need to wire my arduino up with binding posts to
>>>>>>>>> take the readings and if I put it all in a nice box, the kids could easily
>>>>>>>>> go out whenever they want and plug into the thermistor to take recordings.
>>>>>>>>>
>>>>>>>>> Yeah, this sounds like simple, but highly beneficial fun. Thanks
>>>>>>>>> for sharing Dave!
>>>>>>>>>
>>>>>>>>> JSR/
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Mon, Apr 1, 2013 at 12:14 PM, Will <staticphantom at gmail.com>wrote:
>>>>>>>>>
>>>>>>>>>> David, if you want... purchase the ethernet shield and the
>>>>>>>>>> Arduino can tweet directly!
>>>>>>>>>> http://playground.arduino.cc/Code/TwitterLibrary#Example
>>>>>>>>>>
>>>>>>>>>> -Will C
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Mon, Apr 1, 2013 at 12:02 PM, <rsjames at ix.netcom.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> I met a guy once who was interested in cicadas - as snacks!.  He
>>>>>>>>>>> was a bit of a whack job...
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I also have a three step way of informing the public about the
>>>>>>>>>>> cicadas:
>>>>>>>>>>>
>>>>>>>>>>> 1. Listen for loud buzzing.  If it sounds like there
>>>>>>>>>>> are millions cicadas buzzing, cicadas have arrived.
>>>>>>>>>>>
>>>>>>>>>>> 2. Look at a tree.  If covered in cicadas, cicada have arrived.
>>>>>>>>>>>
>>>>>>>>>>> 3. Look outside.  If giant, three-foot-long cicadas are
>>>>>>>>>>> attacking pets and small children, slamming into windows to break them,
>>>>>>>>>>> overturning cars, and creating general mayhem, Brood II cicadas have not
>>>>>>>>>>> arrived - you are in a bad horror movie!
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> RSJ
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> -----Original Message-----
>>>>>>>>>>> From: Will **
>>>>>>>>>>> Sent: Apr 1, 2013 11:07 AM
>>>>>>>>>>> To: Build things for fun! **
>>>>>>>>>>> Subject: Re: [MakeLV] Arduino Cicada warning device
>>>>>>>>>>>
>>>>>>>>>>> If you have a laptop you can hook it up to, then there shouldn't
>>>>>>>>>>> be a
>>>>>>>>>>> problem in displaying the data to the public. I'll ask some
>>>>>>>>>>> friends on the
>>>>>>>>>>> IRC channels what they think, but worse comes to worse something
>>>>>>>>>>> can be
>>>>>>>>>>> linked to twitter. Hackaday has a lot of Arduino + twitter blog
>>>>>>>>>>> posts.
>>>>>>>>>>>
>>>>>>>>>>> -Will C
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Mon, Apr 1, 2013 at 10:59 AM, David Smith ** wrote:
>>>>>>>>>>>
>>>>>>>>>>> > I bought one of the Radio Shack kits on sale after Christmas,
>>>>>>>>>>> so I'm
>>>>>>>>>>> > definitely going to have a go at it. I'm trying to figure out
>>>>>>>>>>> if I can do
>>>>>>>>>>> > it at the Center and show the public the data.
>>>>>>>>>>> >
>>>>>>>>>>> > Sent from my iPhone
>>>>>>>>>>> >
>>>>>>>>>>> > On Apr 1, 2013, at 10:39 AM, Will ** wrote:
>>>>>>>>>>> >
>>>>>>>>>>> > You know.... we do have the majority of the parts from the
>>>>>>>>>>> Arduino class
>>>>>>>>>>> > at the space that we can build a prototype fairly quickly.
>>>>>>>>>>> >
>>>>>>>>>>> > -Will C
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2013 at 10:13 AM, David Smith <
>>>>>>>>>>> > david at davincisciencecenter.org> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> >> Catch the buzz! Be prepared for Brood II
>>>>>>>>>>> >>
>>>>>>>>>>> >>
>>>>>>>>>>> >>
>>>>>>>>>>> http://www.npr.org/blogs/thetwo-way/2013/04/01/175737170/its-almost-cicada-time-help-radiolab-track-swarmageddon?utm_source=NPR&utm_medium=facebook&utm_campaign=20130401
>>>>>>>>>>> >>
>>>>>>>>>>> >> Directions for the detector here:
>>>>>>>>>>> http://project.wnyc.org/cicadas/
>>>>>>>>>>> >>
>>>>>>>>>>> >> Dave
>>>>>>>>>>> >>
>>>>>>>>>>> >> --
>>>>>>>>>>> >> David L. Smith, Ph.D.
>>>>>>>>>>> >> Chief Scientist
>>>>>>>>>>> >>
>>>>>>>>>>> >>
>>>>>>>>>>> >>
>>>>>>>>>>> >> 3145 Hamilton Blvd Bypass
>>>>>>>>>>> >> Allentown, PA 18103-3686
>>>>>>>>>>> >> 484-664-1002 x111
>>>>>>>>>>> >> david at davincisciencecenter.org
>>>>>>>>>>> >> http://www.davincisciencecenter.org
>>>>>>>>>>> >>
>>>>>>>>>>> >>
>>>>>>>>>>> >>
>>>>>>>>>>> >> **
>>>>>>>>>>> >>
>>>>>>>>>>> >> _______________________________________________
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>>>>>>>>>>> >>
>>>>>>>>>>> >>
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>>>>>>>>>>> **********
>>>>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>>
>>>>>>>>> http://about.me/josiah
>>>>>>>>>
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>>>>>>
>>>>>>
>>>>>> --
>>>>>>
>>>>>> http://about.me/josiah
>>>>>>
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>>>>>
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>
>
> --
>
> http://about.me/josiah
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