Please read the posts in the Announcements section about the current status of Cumulus development now that I have retired

Please read this post before posting

Latest Cumulus release v1.9.4 (build 1099) - Nov 28 2014
Latest Cumulus MX release - v3.0.0 build 3043 Jan 20 2017. See this post for download

Search found 1881 matches

by Gina
Sun Feb 14, 2016 11:20 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

I have a DS2408 working now after debugging the Arduino library for it :) But I'm not using that for my wind instruments - I've decided to just get the now obsolete DS2423 and DS2450 circuit working with new optical sensors and hardware. The anemometer is working with the DS2423 counter and the wind...
by Gina
Sat Jan 23, 2016 9:39 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Hi Alan Thank you for your reply :) I understand your wanting to keep power down for battery use. My weather station is and will continue to be near my observatory which has mains power backed up be a sealed lead acid battery, so I always have power available. So keeping power to a minimum is no lon...
by Gina
Fri Jan 22, 2016 11:10 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

I'm having considerable trouble trying to get the DS2408 to work and it's doing my head in so I'm leaving it for a while. I think I could do with coming back to it afresh later. I'm now looking at other ideas.
by Gina
Mon Jan 18, 2016 10:02 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

The digital alternative to the above would be a CMOS 4000 series type 4520 dual 4 bit binary up counter, giving 8 output bits which could be read by a DS2408 1-wire device. But this would require more time to build. Using a reading every 3 seconds I could read the wind speed in increments of 1/3rd m...
by Gina
Mon Jan 18, 2016 7:15 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

I think I might experiment with a diode pump circuit for counting anemoneter pulses which will convert a pulse rate to an analogue voltage which can then be read by a D/A converter such as the DS2438 with either 10v or 250mv A/Ds. The 250mv A/D would give better linearity but OTOH a non-linear respo...
by Gina
Mon Jan 18, 2016 6:20 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Question now is - do I continue using obsolete components for which no replacements are available or change the design to use available and currently supported ones?
by Gina
Mon Jan 18, 2016 4:59 pm
Forum: Homebuilt
Topic: 1-wire info and recommendations
Replies: 77
Views: 18741

Re: 1-wire info and recommendations

Seems like the 1-wire options are reducing by the minute as Maxim withdraw devices without providing an alternative :( Maxim have discontinued the DS2450 :( Believe it or not there are still several 1-wire chips left in production :D I've been through the list and just the following six devices seem...
by Gina
Mon Jan 18, 2016 4:14 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Yes, found a thread I started about 1-wire devices. Not quite up-to-date as Maxim have discontinued the DS2450 :( Believe it or not there are still several 1-wire chips left in production :D I've been through the list and just the following six devices seem of much use to me :- DS18B20 Digital therm...
by Gina
Mon Jan 18, 2016 1:56 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Just looked back through this thread and find I didn't post the circuit diagram for the wind instruments so I think It's time I went through and discussed it. Where possible, I'm using 1-wire devices to make the measurements as this uses a multi-device bus rather like USB or I2C etc. but using just ...
by Gina
Mon Jan 18, 2016 1:33 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Here are some photos of the mod for using the hall effect device. I designed and printed a new rotor taking 3 miniature "supermagnets" a mere 3mm cube but just did a small mod on the stator, drilling a hole for the hall effect chip wires. I connected up a test rig with LED and resistor to ...
by Gina
Sun Jan 17, 2016 12:37 am
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

I've made a new rotor taking 3 tiny "supermagnets" a mere 3mm cube, and just modified the stator by drilling a hole for the hall effect chip wires. Made a test rig with a LED and series resistor to check that everything worked. It did and I have reassembled the anemometer and tried it out ...
by Gina
Sat Jan 16, 2016 5:28 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

I think I shall use a hall effect device and three magnets which will fit well into the rotor that takes the cup spokes. Here is a photo of the anemometer parts. To change over to a hall effect device requires redesigning and printing two parts of the anemometer- the rotor to take two more magnets a...
by Gina
Mon Jan 11, 2016 11:44 pm
Forum: Weather
Topic: Profile of wind gusts
Replies: 5
Views: 1017

Re: Profile of wind gusts

Thank you Alan - very useful :)
by Gina
Mon Jan 11, 2016 11:39 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Yes indeed :) I have a few Hall effect sensors.
by Gina
Mon Jan 11, 2016 2:01 pm
Forum: Homebuilt
Topic: Arduino and 1-wire based home built weather station.
Replies: 80
Views: 19798

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

Thanks Mark :) I could try a weaker magnet or moving it further away as you suggest. I had thought of measuring duration of each half revolution rather that counting pulses - it's certainly a possibility though I haven't worked out just how I would do it. I've been thinking of this idea for the rain...

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