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> Challenge: Diy Weather Station
JoOngle
Posted: April 16, 2015 01:33 pm
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DIY Weather Station.

This is kind of a fun challenge I believe a lot of people could be able to participate in, partially because we have a lot of software/embedded systems/DIY-MCU fiddlers in here, and partially because we have lots of analogue experimenters that could probably find a simple way to create some weather measurement functions.

It could be anything from a simple light-meter (with a solar panel and an analogue display, no batteries needed), to an full blown Weather station with Arduino and a bunch of sensors like the DHT11 Humidity sensor or perhaps an LM 335 Temperature sensor, photovoltaic sensors? Maybe some leds and ir's (rotary decoders) to check on wind direction? Etc...sky's the limit, err...your imagination!

Scoring:

The criteria for scoring will be something like.

- Extra points for weird science (meaning anything unusual instead of the traditional sensors/stuff).
- Extra points for accuracy, the more accurate to real life, the better.
- Extra points for documenting the project, but it's not required.
- Extra points for EACH sensor/feature added.


Rules:

1) You must provide a video of the finished results.
2) The prize is the forum honours, you WILL be remembered for the cool stuff you make.
3) You can enter multiple entries, but chose your final submission.
4) W.I.P - Threads is encouraged. Suggestions are allowed.
5) Everything must be built from scratch, no throwing in an already made weather station or a commercial unit. Exempts from this rule include units made for devboards like Arduino, AVR, AtMega, 87c51(2), PIC boards etc... such as wireless units, sensors etc.
6) Your submissions doesn't have to be accurate, it's supposed to be a fun project so reflecting weather changes and so on...is completely acceptable.

Deadline:
30th of April - 2015.

Good luck to everyone, and above all - have fun! smile.gif


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David Stephenson
Posted: April 30, 2015 07:10 pm
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I find it really difficult to embed images so here's a link..
http://s375.photobucket.com/user/davidstep...nakuw2.jpg.html
Breaking the rules with a static picture rather than a video.

This is a temperature humidity device. It uses a Trusens/Mobicon HCZ-J3 humidity sensor and a ATC Smeitec 203AT-2 thermistor (both from rapid electronics).

The processor is a PIC16F688 and the display is from a Nokia phone. The small numbers are the high and low temperatures and the dew point. (It is just a coincidence that it is showing 50% it calculates to the nearest 1%).
As you can see the power is 2xAAA batteries which last about 1 year (the display takes most of the power).
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JoOngle
Posted: May 02, 2015 02:04 am
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Hi David.

Well, it turns out you're a winner by default as there are no other entries to this months competition.

Looks like a decent experiment, of course as you said...it's just a picture. I kinda like that you used the display from a Nokia mobile phone. thumbsup.gif There's nothing cooler than re-using proprietary devices and making them run by proper reverse engineering (IMHO).

So no voting needed.



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draget
Posted: May 02, 2015 05:04 am
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What's the protocol for the phone screen?
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Colt45
Posted: May 02, 2015 10:21 am
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Most of the old nokia displays are really simple to interface, and low power

They're just SPI, some have a pin to specify data or command, while other ones need a 9 bit byte (one bit being a data/command flag)

it's pretty well documented


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