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Latest Cumulus MX release v3.4.0 (build 3064) - 19 February 2020.
    Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014

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    Search found 24 matches

    by ScottM
    Mon 01 Dec 2014 3:29 am
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    In the end I got something working, using a microprocessor and wifi chip. It was very reliable, but it cost too much, and less than a year later a lightning storm destroyed it. (Lesson learned: you do not power a weather station with household current; nearby lightning induces currents relative to g...
    by ScottM
    Fri 23 Nov 2012 1:08 pm
    Forum: Homebuilt
    Topic: Weatherproofing circutry
    Replies: 1
    Views: 1117

    Weatherproofing circutry

    I have the electronics for my weather station working. But I can't put it outside as is; it wouldn't survive long. What techniques to people use to weatherproof the circuitry? The two obvious problems are water, and having an enclosure heat up in the sun and throw readings off. I can smear vasoline ...
    by ScottM
    Fri 23 Nov 2012 12:51 pm
    Forum: Homebuilt
    Topic: Arduino and 1-wire based home built weather station.
    Replies: 80
    Views: 28270

    Re: Arduino and 1-wire based home built weather station.

    As one wire devices go, http://datasheets.maximintegrated.com/en/ds/DS2413.pdf is pretty simple. You can take the existing library for another one wire device and just code up the two commands you need, based on example. It looks like all you need is reset, select, write a byte (F5 or 5A), read a by...
    by ScottM
    Thu 22 Nov 2012 1:32 pm
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    I've gotten usable results with a 5k resistor pulling up to 5v, the wind vane resistor array pulling to ground, and the Arduino's analog input reading the result, providing a 10 bit value. How stable it's going to be when it's outside, facing a 110 degree temperature range over a year, I don't know....
    by ScottM
    Wed 21 Nov 2012 7:06 pm
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    I don't have any controlled tests available. In my ad hoc test, the peak windspeed and average windspeed seem too different, but I'll experiment more and check my math. I'm trying a 5k resistor, but ENE and E are still very close together for a ten bit A/D, even with that. Not that big a deal, reall...
    by ScottM
    Wed 21 Nov 2012 1:58 am
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    I have everything "working" in the sense of electrical signals and software to process them; but I'm unhappy with the way I'm doing wind direction. I have a voltage divider with a constant 45k pulling up to +5v, and the wind vane's varying resistance pulling to ground. The Arduino only sees a 2 out ...
    by ScottM
    Wed 21 Nov 2012 12:16 am
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    I've had success with the one wire library, though very occasionally one of the sensors decides not to report back. (It's possible the poor Arduino can't quite handle everything I'm throwing at it, but it's more likely my prototype's wiring isn't perfect, and things will improve when I use a real ci...
    by ScottM
    Mon 19 Nov 2012 1:46 pm
    Forum: Fine Offset/EasyWeather
    Topic: Fine Offset Anemometer Factor.
    Replies: 48
    Views: 12247

    Re: Fine Offset Anemometer Factor.

    Sorry to resurrect an old thread, but if 1 revolution is 2 pulses per second is 2.81mph, then a wind speed of 100mph (I hope never to experience that, but I guess it's possible) is about 35.6 revolutions per second. or about 71 pulses per second. Or a pulse every 14ms or so. What's a typical debounc...
    by ScottM
    Sun 18 Nov 2012 10:19 pm
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    I've just recently restarted my weather station project. I'm using an Arduino, a wifi shield, and some one wire sensors, plus the rain gauge, wind vane and anemometer from the FO station. Not the cheapest solution, but I have the wifi and temperature working and it's been simple so far. I expect the...
    by ScottM
    Tue 17 Apr 2012 5:13 pm
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    >If you're considering the FO wind vane, that's exactly what they do. I already have the FO weather vane, so I guess I'm using it. :-) How do they account for cap drift? reed switch debounce? The vane moving in the middle of the measurement? Or do they just hope for the best? Do they use a 0.1uf cap...
    by ScottM
    Tue 17 Apr 2012 2:36 am
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    Alright, so... having priced one wire components for everything, I think I'm giving up and moving away from one-wire for windspeed, rainfall, and wind direction. Windspeed and rainfall are just digital pulses, which the processor I have (netburner 5270) won't have any problem debouncing and counting...
    by ScottM
    Mon 09 Apr 2012 2:02 pm
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    Hi Scott Final point, re my original comment: one wire only brings transport layer to the table - you still need to code for all the sensors. If you use WIFI for the transport layer, then what does one wire add? I like one-wire because I can add and drop sensors with minimal wiring, without touchin...
    by ScottM
    Sun 08 Apr 2012 12:38 pm
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    If you are stuck on using WIFI, then the one wire stuff does not make much sense. With few exceptions, the sensors are standard analog devices, digitized and then transmitted by one wire. If you are planning a processor to collect data and manage a WIFI ink, then you might as well use it to interfa...
    by ScottM
    Sat 07 Apr 2012 11:53 am
    Forum: Homebuilt
    Topic: Fed up with Fine Offset. I want to start from scratch?
    Replies: 34
    Views: 10834

    Re: Fed up with Fine Offset. I want to start from scratch?

    I'll try twisting the transmitter. That's at least a cheap solution. If it helps, fie on Ambient support for not suggesting it. But I'm considering just sending it all back and building from scratch. I'm contemplating this because there's a couple of unusual characteristics about my intended use: 1....
    by ScottM
    Sat 07 Apr 2012 11:21 am
    Forum: Fine Offset/EasyWeather
    Topic: Photos of the insides of Fine Offset sensors.
    Replies: 150
    Views: 160290

    Re: Photos of the insides of Fine Offset sensors.

    All good fun, but in my experience, any hacking of devices like this usually takes a lot more effort than I first envisage. Hrm. Interesting, but it means voiding the warranty in a fundamental way. I want to keep the option of sending this junk back and getting my refund (to help defray the cost of...