lillol,
There is an existing discussion on this where a simple method is suggested for a LDR is shown using a variable resistor component.
http://forums.ni.com/ni/board/message?board.id=370&thread.id=4097
Another approach if you wanted a more realistic response (light to resistance), would be to use a Voltage Controlled Resistor and create a LabVIEW VI that would be able to calculate the required LUX to Voltage conversion needed to make this a nonlinear resistive controlled device. Alternatively you can use a PWL (piece wise linear) function and import the calculations from a spreadsheet (however this would step you through values and not give you immediate control on the output).
Regards,
Patrick Noonan
Business Development Manager
National Instruments - Electronics Workbench Group
50 Market St. 1-A
S. Portland, ME 04106
Email: patrick.noonan@ni.com
Tel. (207) 892-9130
Fax. (512) 683-7754
