[MakeLV] Arduino Cicada warning device

Mon Apr 1 14:07:55 CDT 2013

I believe so. Just watch the temp ranges vs what you plan to measure. They
vary on each of those. Looks like the cheap one would be fine! :D

On Mon, Apr 1, 2013 at 2:52 PM, Josiah Ritchie <josiah at josiahritchie.com>wrote:

> Thanks Tyler. So to do this simply, I need to pick up a GE NTC 503
> thermistor.
>
> It would seem a search or RadioShack's website for thermistor shows only
> potentiometers. *sigh* I don't want a whole kit.
>
> So digikey, is it safet to assume any of these three will work?
>
> http://www.digikey.com/scripts/dksearch/dksus.dll?k=NTC+503&vendor=0&mnonly=0&newproducts=0&ptm=0&fid=0&quantity=0&PV-1=45&PV866=43&PV69=867&stock=1
>
> JSR/
>
>
>
> On Mon, Apr 1, 2013 at 2:35 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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>
>
> --
>
> http://about.me/josiah
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