Thursday, 11 February 2016

Home Brew Weather Station (Part 2)

I had a change of mind with the display. For me not only the immediate temperature is of interest but so are the maximum and minimum temperatures.

First thought. With a bit of extra coding and rearranging the display I came up with:


Top left, immediate temperature.  Top right immediate percentage relative humidity.
Bottom left, maximum temperature, Bottom right, rainfall in mm.


Switched so the bottom left shows minimum temperature.
I put the sensor in the top of a freezer to check it showed negative temperatures OK.

Further thought. Do away with the humidity reading:


Now I have:
Top left, immediate temperature, Top right, total rainfall in mm
Bottom left, maximum temperature. Bottom right, minimum temperature.


I am quite pleased with the final layout. The whole thing draws less than 80mA.
Once cased the unit will have buttons to reset max / min temperature and rainfall. On my old home brew rain gauge I reset the count at the beginning of each month and I would probably want to reset max / min temp daily.


  1. I am bowled over by your expertise here John. The whole thing is still a foreign language - but shall enjoy the results when it is up and working.

    1. Weaver: It's certainly keeping my brain active.

  2. looks great! Is display only or does it keep a record too?

    1. Wilma: Display only at the moment. I'm still thinking about how to keep records with it.

  3. This looks sorted. I'll have to have a go at mine as it is suffering some corrosion.

    1. Adrian: I keep thinking of new things to add. The cheap commercial ones don't really seem to last very long before they need the six inch drop test to keep them going.


Thank you for visiting. Hope you enjoyed the pictures. Any comment, or correction to any information or identification I get wrong, is most welcome. John

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