Anemometer (Windmeter) wiring problem

[Sharagim]

Hi,
I have a Anemometer which i have problem for wiring. It has five wires as shown in the picture. I think it should be something like opto counter(Not sure) but there is another little device too.
Thanks,

 

[Genovator]

Yes. It seems like a optical counter. Must be infra red. Any one of them is a transmitter and another is a receiver. The transmitter should have one voltage input & ground. The receiver, if it does not have any inbuilt chip and consist two wires, must have one voltage input, another signal output. The common wire for both could be its voltage line. The rest two wires could be of the dynamo in the fan. I am not sure because I cannot see all the wires in your picture.

 

[Sharagim]

I am agree with you , and I think that small black one with 2 other wires is temperature sensor.
Do you have any idea how we can find the working voltage of opto counter?

 

[Genovator]

Its hard to know because the opto counter may work in any low or high voltage. One thing you can do is placing the transmitter & receiver in opposite to one another, providing low voltage to transmitter, say 1 or 1.5v, and check the reading of the receiver. Start to increase voltage from low to high and see at which voltage the optocounter starts to work. Example, if at around 1.5 to 2v, then it requires 3v.