[MakeLV] Arduino Cicada warning device

Mon Apr 1 23:30:23 CDT 2013

My difficulty isn't the formula, but figuring out where to find which
parameters to put in where. That's a consistent problem for me when I'm
looking at datasheets.

On Tue, Apr 2, 2013 at 12:18 AM, Will <staticphantom at gmail.com> wrote:

> Thank Tyler. He gave me the equation in his lists. Dave better want one of
> these after we are done.
>
> -Will C
> -
> On Apr 2, 2013 12:11 AM, "Josiah Ritchie" <josiah at josiahritchie.com>
> wrote:
>
>> Thanks Will
>>
>>
>> On Tue, Apr 2, 2013 at 12:04 AM, Will <staticphantom at gmail.com> wrote:
>>
>>> 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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>>>>>>>>>>>>>> >
>>>>>>>>>>>>>> >
>>>>>>>>>>>>>> > _______________________________________________
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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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>> http://about.me/josiah
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