variable voltage out

[Adzel]

Hello,

I would like to build a simple "rheostat" with LabVIEW.

I have LabVIEW 7.1 and a simple SCB-68 connector block.

Is there a way to do this via Analog Output and one of the channels (DIO 0-7) that I have on the connector block?

I would like the voltage to be varied via a control on the front panel (0 to 5 volts). This would then be read by a meter.

It is a simple experiment in which I would like to explain LabVIEW's analog output capability to some students. Have them vary the voltage output and then read it via a simple hand-held multi-meter

Thanks very much!

Adzel

[tbob]

You need an Analog Input instead of a DIO.  Which analog board are you using?  The SCB-68 is simply a connector block, not an analog board.  Normally you would connect a power supply across a potentiometer (or rheostat), and connect the wiper arm to an analog input, with analog in ground connected to power supply return.  Then the analog input would read the voltage at the wiper arm which would change as you turned it.  Labview has DAQ functions for setting up analog modules, reading analog inputs, and outputing values to analog outputs to generate voltages.  Search the Labview examples on DAQ or Analog In/Out and you will see several vi's that can get you started.  You have to install DAQ drivers in addition to Labview.