Author Topic: wind datalogging  (Read 4289 times)

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midwoud1

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wind datalogging
« on: October 21, 2014, 09:05:04 AM »
Anemometer.
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Electronic inside schmitt-trigger CD 40106 ,integrator CA 3140 , output full scale 1 vdc.

midwoud1

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Re: wind datalogging
« Reply #1 on: October 21, 2014, 09:10:34 AM »
Schematic diagram.

kitestrings

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Re: wind datalogging
« Reply #2 on: October 21, 2014, 09:43:41 AM »
Nice

SparWeb

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Re: wind datalogging
« Reply #3 on: October 22, 2014, 12:16:53 AM »
Great work.

Is there anything special about the CA3140 Op-amp?
Would a MC74HC14A Schmitt trigger work for this too?  (I think I have one)

My typical microcontroller circuits use a 0-5V ADC range, with 10-bit resolution. 
If limited to 0-1V range, then the resolution would only be about 200 increments. 
Hey, that's plenty!  Who needs to measure wind speed in 0.1 kph increments, when it varies by 5 kph every minute anyway?  :)

Thanks!
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midwoud1

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Re: wind datalogging
« Reply #4 on: October 22, 2014, 01:07:05 PM »
@ Sparweb.

The CA 3041 is working as a buffer, smooth moving needle on the analog meter.
And a clean Vdc output. The circuit gives a lineair scale so you can use a range of meters.
I have a 100ua Vu- meter .
The MC74HC14A Schmitt-trigger has the same diagram as the CD 40106, a CMOS with high speed and low current properties.
There are publcations with Arduino uCs used as dataloggers (Adafruit) etc.
Like to know more about it.
Rgds.   - Frans -


Mary B

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Re: wind datalogging
« Reply #5 on: October 22, 2014, 05:09:10 PM »
I have a brand new 100ma meter is anyone needs one to experiment.

midwoud1

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Re: wind datalogging
« Reply #6 on: November 04, 2014, 02:58:41 PM »
Variable Dc voltage to datalogger .
The windspeed is translated in numbers.
Samples can be made with intervals of 10 sec. 1minute ,or 10 minutes.
The list is transferred to Excel .
In Excel we can make a choice of several graphics.
I made the line graphic.






midwoud1

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Re: wind datalogging
« Reply #7 on: December 12, 2014, 03:24:36 PM »

   Windlog 11-12-2014
               12-12- 2014

Mary B

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Re: wind datalogging
« Reply #8 on: December 12, 2014, 04:53:31 PM »
Doesn't look to bad for a wind site, average looks around 15mph

kitestrings

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~
« Reply #9 on: December 14, 2014, 08:35:25 AM »
What's the box on the far left?

Looks like your getting good results.  ~ks

midwoud1

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Re: wind datalogging
« Reply #10 on: December 14, 2014, 04:13:47 PM »
Hi,
The box on the far left is a powersupply. +5 volt , -5 volt , + 12 volt.