Anemometer output
JAG
Posts: 2
in BASIC Stamp
Hello Guys,
I am the new kid on the block.
Have an Met One Anemometer 034B model.
I need to reed pulse count in and need analog voltage out.
Has anybody done this before?
Kind Regards,
JAG
I am the new kid on the block.
Have an Met One Anemometer 034B model.
I need to reed pulse count in and need analog voltage out.
Has anybody done this before?
Kind Regards,
JAG
Comments
If this sort of back and forth won't work for you, you could use an external DAC (Digital to Analog Converter) to generate the analog voltage so the Stamp can spend most of its time measuring the anemometer pulses and just update the DAC input register occasionally. Look in this text for information on this topic.
Cheers,
The Stamp can COUNT the pulses for a time interval, then read the analog value of the potentiometer. It is possible to read the value of the potentiometer using the RCTIME command, or by adding an external analog to digital converter. From those two values you find speed and direction.
An analog solution would be to have the reed relay trigger a 555 one-shot, charging an electrolytic capacitor. The cap's (analog) voltage would increase as the RPM & pulse rate went up. For instance:
http://www.diyelectronicsprojects.com/2012/08/frequency-to-voltage-converter-circuit-diagram.html