[MakeLV] Arduino Cicada warning device

Mon Apr 1 13:35:55 CDT 2013

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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