Questions about control fan

[ForgivablE]

i have a question about control fan. My project is using labview to control fan on/off switch when temp is higher. i don't know how to create voltage to drive fan or a on/off signal and how to connect the fan to the DAQ card.

i am using K-type thermocouple to get temp.

My labview is 8.0 and the DAQ is PCI-6221, BNC-2120 is a connection board.

Please someone can help me, thank you so much.

[Jim Kring]

QUOTE(ForgivablE @ Apr 25 2007, 07:52 PM)

i have a question about control fan. My project is using labview to control fan on/off switch when temp is higher. i don't know how to create voltage to drive fan or a on/off signal and how to connect the fan to the DAQ card.

i am using K-type thermocouple to get temp.

My labview is 8.0 and the DAQ is PCI-6221, BNC-2120 is a connection board.

Please someone can help me, thank you so much.

I suggest a battery or power supply for the voltage (don't forget that you'll need some current, too, if you want any power). Connect the fan to the DAQ card with wires, and put a relay/switch in to turn it on and off. Note: the thermocouple will create voltage and current, but not enough to drive your fan.

[ForgivablE]

QUOTE(Jim Kring @ Apr 26 2007, 01:05 PM)

I suggest a battery or power supply for the voltage (don't forget that you'll need some current, too, if you want any power). Connect the fan to the DAQ card with wires, and put a relay/switch in to turn it on and off. Note: the thermocouple will create voltage and current, but not enough to drive your fan.

Thank you so much

Do u have some examples?

[crelf]

QUOTE(ForgivablE @ Apr 26 2007, 06:43 PM)

Do u have some examples?

[Jim Kring]

QUOTE(ForgivablE @ Apr 26 2007, 01:43 AM)

Thank you so much

Do u have some examples?

Yes, there are a lot of examples in the "examples" folder beneath LabVIEW's installation location. You can also use the NI Example Finder, from the LabVIEW Help menu.