But unfortunately I don't know exactly how to attach and use it on an arduino nano board. Also I am not so familiar with electronics, therefor I don't exactly how to start.
I have got a manual from the supplier, but that does not clarify stuff for me https://1drv.ms/w/s!AmsPyx0xoB6jjYo0PZZRazdA3-vPpw
I tried al kind of setups and sketches that I found on this site and other sites, but I don't get the data that I see in the serial monitor.
Does anyone has got a clue how I properly can connect this device to arduino nano and maybe someone has got a little example sketch which gives me the basics how to use this device?
Well it seems to have no part number and no connection diagram. You could guess that
red is +12V and black is ground, and see with a multimeter what signal emerge on the other
wires, but there is some risk involved.
Caveat emptor, especially for a product with no part number!
I do not think that is the same sensor that rnollen has purchased. Your link is for a DC output type sensor. But rnollen has purchased a pulse type sensor.
According to the data sheet rnollen posted there are quite a number of different sensors but they all look the same.
@rnollen, is there a model number written anywhere on the device? The eBay page says that it is a pulse type, but the data sheet seems to say there are several different variations of the pulse type. The model number will tell you which type and so how to interpret the output.
I have seen these type of sensor on eBay before, but I did not buy one because the description and documentation was very poor. I will help you with a sketch if I can. I have written sketches for other type of anemometer before.
PaulRB:
I do not think that is the same sensor that rnollen has purchased. Your link is for a DC output type sensor. But rnollen has purchased a pulse type sensor.
....
According to the data sheet rnollen posted there are quite a number of different sensors but they all look the same.
Good point, I did not take care about "pulse type sensor", I just saw the same values for OP user manual "A correspondence table of the wind speed and the output signal", and my link reference "Relationship between Speed and Output value", both of them have the same voltage output (0-5V ) values.
So, you could be right about it.
The sensor you bought has a pulse output according to the ebay link.
The manual lists three possible pulse outputs.
NPN, NPN with inbuild pull up resistor, and PNP.
Connect red and black to a 12volt supply, and measure with a DMM between out and negative.
Rotate the cups.
Nothing: You have an NPN sensor without internal pull up resistor.
On/off pulses the hight of the supply: could be NPN with pull up or PNP.
Connect a 1k resistor between output and negative, and measure again.
If the pulses are >10volt, you have a PNP sensor.
If the pulses are <3volt, you have an NPN sensor with inbuild pull up.
I don't think PWM to voltage will work here.
If it's a pulse out anemometer (hall sensor), it will output x pulses per rotation.
So pulses (state change) have to be counted during a certain time.
Number of changes can be converted to wind speed.
Leo..
@All Thanks, for all the comments. Luckily today I also received some additional info from this supplier. The device is a NPN model. Type 12CM, according to the supplier which means it will do 12 pulses for 1m/s per second. But the manual says that this model is 10 pulses for 1m/s, so I think the manual is then more accurate.
So basically I could now connect the device as NPN, only I need to find out how. I have a 4.7k resistor Does anyone knows how to connect it and maybe by chance have an example sketch that I can use?
I'm not sure why you are asking so I will assume that means you don't know how to connect a pull up resistor. The output goes to any digital input. The resistor goes from that pin to +5V.
Post the color & wire label names for the device. If there is only power and signal then your done.
Connect red and black to a 12volt supply, and measure with a DMM between out and negative.
Rotate the cups.
Nothing: You have an NPN sensor without internal pull up resistor.
On/off pulses the hight of the supply: could be NPN with pull up or PNP.
..
Report back.
Leo..
Thanks. I did this quick test. Added a 12 Volt DC to it, measured the Red and Black. Nicely 12V. Then I measured the Yellow and Black as you descibed. It is 0V. But, then it is different, when I rotate the cups it will go to just above 5V. I stop and it is back to zero? So is it for sure an NPN Then?
raschemmel:
I'm not sure why you are asking so I will assume that means you don't know how to connect a pull up resistor. The output goes to any digital input. The resistor goes from that pin to +5V.
Post the color & wire label names for the device. If there is only power and signal then your done.
Yes. Basically this is my first project with a resistor. Unfortunately my knowledge on this part is limited
But I connected the Red and black from the DC to the anomometer. The yellow, connected that to my breadboard from there to D7 to my Arduino. On this connection of the breadboard I connected a 4.7K resistor and the other side of this resistor I connected that to 5V. I think this is OK right?
