Post by thread:[OT]: Anyway to design a circuit to predict weathe

Dear All, Is there anyway circuit that can be build to predict the weather is going to rain? Pls help .... __________________________________________________ Do You Yahoo!? Find a job, post your resume. http://careers.yahoo.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

Tan William wrote: > > Dear All, > > Is there anyway circuit that can be build to predict > the weather is going to rain? > > Pls help .... If you find one, sell it to the weather bureau. I think they rely on thier computer models too much these days, and forget about looking out their windows occasionally. -- Best regards Tony mICros http://www.bubblesoftonline.com .....salesKILLspam@spam@bubblesoftonline.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

Electronically connected seaweed is the answer. When I return to the Old Dart I'll be at the seaside doing my research. Seaweed ,Silicon and Chips must be a connection somewhere! Colin -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam.....mitvma.mit.edu with SET PICList DIGEST in the body

There are two reasonable ways: 1) Sustian a war injury, grow old, and press a button when it 'acts up'. 2) Hire some elder who has such an injury and have them press the button. There are no 'sure signs' of rain, but you can always use an internet attached PIC to read off the percentage chance of rain from your favorite web site and sound the warning if the percentage is above a set point. There are simply to many unknowns and too many factors. Meteorologists with satellites, weather ballons, and ground sensors (radar, etc) can't tell weather accurately within an hour. Of course, if you mean to sell these in seattle, you can just wire it 'on'. -Adam Tan William wrote: {Quote hidden}>Dear All, > >Is there anyway circuit that can be build to predict >the weather is going to rain? > >Pls help .... > >__________________________________________________ >Do You Yahoo!? >Find a job, post your resume. >http://careers.yahoo.com > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email EraseMElistservspam_OUTTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body > > > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservspam_OUTmitvma.mit.edu with SET PICList DIGEST in the body

Hi William: The best single station forecasting method that I have found is the "Sager Weather Caster". I have some info on it at: http://www.pacificsites.com/~brooke/Weather.shtml The accuracy may be improved by basing the lookup table on your local conditions. The book works best on the East Coast, but I used it in the S.F. bay area and it worked fine. Have Fun, Brooke -- http://www.piclist.com hint: To leave the PICList @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu

This is easy, simply place an LED on the desk, if it illuminates with no connections to it, this indicates that it will NOT rain in the next 24 hours. This device is 97% reliable in the UK ! KILLspampic_infoKILLspamYAHOO.COM on 12/11/2001 00:40:48 Please respond to RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDUTakeThisOuTINTERNETTakeThisOuTwtgw To: spamBeGonePICLISTspamBeGoneMITVMA.MIT.EDUspamBeGoneINTERNETspamBeGonewtgw cc: Paper Mail: Subject: [OT]: Anyway to design a circuit to predict weather is going to rain? *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. Dear All, Is there anyway circuit that can be build to predict the weather is going to rain? Pls help .... __________________________________________________ Do You Yahoo!? Find a job, post your resume. http://careers.yahoo.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email TakeThisOuTlistservEraseMEspam_OUTmitvma.mit.edu with SET PICList DIGEST in the body ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

> This is easy, simply place an LED on the desk, if it illuminates with > no connections to it, this indicates that it will NOT rain in the next 24 > hours. This device is 97% reliable in the UK ! Only 97% ? Nice to know the weather is clearing up over there at last -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestEraseME.....mitvma.mit.edu

UK rain thing was based upon humidity. Suppose the best way to detect if its going to rain, is to have a series of sensors, ring like configuration at some distance from you, say 10 miles. Each sensor will monitor relative humidity, wind, moisture, etc. Then each sensor system is polled and a host computer looks at each unit and relates the data to indicate a rise in humidity, temp lower, etc. Then it can continue and then if the water sensor is activated it is pretty much assured that you might get rain in a while. Sounds rather complicated tho.... {Quote hidden}>From: "Alan B. Pearce" <RemoveMEA.B.PearceEraseMEEraseMERL.AC.UK> >Reply-To: pic microcontroller discussion list <RemoveMEPICLISTspam_OUTKILLspamMITVMA.MIT.EDU> >To: RemoveMEPICLISTTakeThisOuTspamMITVMA.MIT.EDU >Subject: Re: [OT]: Anyway to design a circuit to predict weather is going > to rain? >Date: Mon, 12 Nov 2001 10:55:58 -0000 > > >Seaweed ,Silicon and Chips must be a connection somewhere! > >Fish and sand come to mind ;) > >-- >http://www.piclist.com hint: To leave the PICList >EraseMEpiclist-unsubscribe-requestspamspamBeGonemitvma.mit.edu > > _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestKILLspammitvma.mit.edu

> Is there anyway circuit that can be build to predict > the weather is going to rain? Here in Holland the prediction formula: int rain_tomorrow( void ){ return 1; } works quite well. In most other countries int rain_tomorrow( int rain_today ){ return rain_today; } might work better, often it fails only two times each year. It said that in some unfortunate countries int rain_tomorrow( void ){ return 0; } has performed amazingly well the last few years. Wouter van Ooijen Van Ooijen Technische Informatica: http://www.voti.nl Jal compiler for PIC uC's: http://www.voti.nl/jal -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestSTOPspamspam_OUTmitvma.mit.edu

Mike Blakey <spamBeGonemike.blakeySTOPspamEraseMEBAESYSTEMS.COM> wrote: > This is easy, simply place an LED on the desk, if it illuminates with no > connections to it, this indicates that it will NOT rain in the next 24 > hours. This device is 97% reliable in the UK ! This method works here too! In our case the indication is inverted, if it illuminates, then it indicates that it will rain! And it is more accurate than in the UK ;-) ;-). Peter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

>Here in Australia it is a little different, not only do we know it is going >to rain but we can control when and how much it will rain. >All we do is wash the car and it rains. The amount of rain is proportional >to the amount of effort we put into cleaning the car. In Brazil, is the same... ---8<---Corte aqui---8<---- Alexandre Souza KILLspamtaitospamBeGoneterra.com.br http://planeta.terra.com.br/lazer/pinball/ ---8<---Corte aqui---8<---- -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

After the recent rain here in Brisbane (Australia), I was considering drawing some markers up the inside of my car and retiring it as a rain-gague. Man I hate the smell of wet carpet. Time to get out the silicone glue again.... <g> DH wrote: Here in Australia it is a little different, not only do we know it is going to rain but we can control when and how much it will rain. All we do is wash the car and it rains. The amount of rain is proportional to the amount of effort we put into cleaning the car. Regards David Huisman -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> Here in Australia it is a little different, not only do we know it is going > to rain but we can control when and how much it will rain. > > All we do is wash the car and it rains. The amount of rain is proportional > to the amount of effort we put into cleaning the car. New Zealand: New Plymouth If you can't see the mountain (Taranaki) it is raining. If you can see the mountain then it is going to rain. Westland (wet-land), Chatham Islands If it's not raining then someone has made a mistake. This will be remedied VERY shortly. Auckland Rains quite a lot. Mainly at weekends. Wellington Rains less than Auckland but the rain comes in horizontally. Generally Usually rains somewhere here about 2 or 3 days after the Aussie's wash their cars. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

I dont know if your question ever got answered, but, how accurate do you want? Barometric pressure is actually a good way to predict if it is going to rain. I know the accuracy would deffenitly be much greater than 50% (if 50% is ok, use a coin). You could hook up a little digital barometer to a comparator, and if the pressure drops enough (low pressure=rain, high=no rain), then a light could come on or whatnot. This is how it was done in the home for decades (most of our grandpas had them). "These pressure differences have a big effect on the weather, so if you know the current air pressure at your house, as well as the pressure trend, you are able to predict certain things about the weather. As a very loose rule, a high-pressure area will be clear, and a low-pressure area will be cloudy and rainy. " (http://www.howstuffworks.com/question13.htm) _____________________________________________________________ Get your free email here at http://www.e-ha.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> I dont know if your question ever got answered, but, > how accurate do you want? > Barometric pressure is actually a good way to predict if it is going > to rain. I know the accuracy would deffenitly be much greater than 50% > (if 50% is ok, use a coin). I noticed this week that the foil lid on a large size "noodles in a bowl" bulges up significantly when the atmospheric pressure drops just before rain. Appears consistent no matter what the flavour. Add a microswitch, battery and buzzer (and anti-theft device) and there you have it. Should only be about a 2 minute job... Brent Brown Electronic Design Solutions 16 English Street Hamilton, New Zealand Ph/fax: +64 7 849 0069 Mobile/text: 025 334 069 eMail: EraseMEbrent.brownEraseMEclear.net.nz -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> I noticed this week that the foil lid on a large size "noodles in a > bowl" bulges up significantly when the atmospheric pressure drops > just before rain. Appears consistent no matter what the flavour. Add > a microswitch, battery and buzzer (and anti-theft device) and there > you have it. Should only be about a 2 minute job... Of course the accuracy would likely depend on what the weather was like at the factory when it was produced! On the plus side, you'v got something warm to eat while it rains. Dale -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> I noticed this week that the foil lid on a large size "noodles in a > bowl" bulges up significantly when the atmospheric pressure drops just > before rain. Appears consistent no matter what the flavour. Good to see you have found an alternative to watching the grass grow. Which is the bigger rush ? :-) One solution we were going to use for a robotic telescope that lives out in the middle of nowhere, was to have rain detectors at several points around the compass and some distance from the telescope. They were to be equipped with little radio transmitters and when they detected rain, would radio the telescope and it would shut down. Since it was looking at the sky and would shut down if it was cloudy anyway, the main situation we were concerned about was a frontal band. Steve. ====================================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: @spam@steveb@spam@spam_OUTtla.co.nz fax +64 9 820-1929 ====================================================== -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

On Fri, 16 Nov 2001, Brent Brown wrote: > I noticed this week that the foil lid on a large size "noodles in a > bowl" bulges up significantly when the atmospheric pressure drops > just before rain. Appears consistent no matter what the flavour. Add > a microswitch, battery and buzzer (and anti-theft device) and there > you have it. Should only be about a 2 minute job... Wow, it also doubles as an emergency food source, wonder if the manufacturers thought of that :-) Cheers, Bob -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Update for anyone who likes a chuckle.... I recently had the opportunity to confirm DH's theory below (YMMV outside Australia): I cleaned and de-odourised the inside of my car on the weekend (to get rid of the wet carpet smell), and it promptly became overcast and rained and filled up the floor-trays within 3 hours. I may need to combine the input of a water-level meter and my odometer to get accurate rainfall readings, since I get more water intake when I drive on rainy days. Have to hand-enter the "amount of effort" as well (see DH below). *sigh* -Dave. David Venz <david.venz@INV To: spamBeGonePICLISTKILLspamMITVMA.MIT.EDU ENSYS.COM> cc: Sent by: pic Subject: Re: [OT]: Anyway to design a circuit to predict weather is going to microcontroller rain? discussion list <PICLIST@MITVMA .MIT.EDU> 11/14/01 09:42 AM Please respond to pic microcontroller discussion list After the recent rain here in Brisbane (Australia), I was considering drawing some markers up the inside of my car and retiring it as a rain-gague. Man I hate the smell of wet carpet. Time to get out the silicone glue again.... <g> DH wrote: Here in Australia it is a little different, not only do we know it is going to rain but we can control when and how much it will rain. All we do is wash the car and it rains. The amount of rain is proportional to the amount of effort we put into cleaning the car. Regards David Huisman -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics