David1 Posted March 31, 2013 Share Posted March 31, 2013 I am new to Labjack and DAQFactory. I need a really quick and dirty method to generate two analogue outputs from the U3. All I need to do is manually input 2 values (volts) and get the U3 to outpout the voltages. Link to comment Share on other sites More sharing options...
AzeoTech Posted April 1, 2013 Share Posted April 1, 2013 I would review the DAQFactory - Labjack Quick Tutorial, or for a little more detail, the DAQFactory - LabJack application guide. Both are installed with DAQFactory. The Quick Tutorial shows a digital output, but the concept is the same for analog, just click "Analog Out" in step 17 instead of Digital Out. Link to comment Share on other sites More sharing options...
EA1 Posted November 18, 2013 Share Posted November 18, 2013 I was wondering the same thing, but I note that all the GURU posts say to just read the Manual. I have to say that it is not clear at all how to address the DAC0 and DAC1 channels and their output. Your suggestion here to press "analog out" instead of "digital out" in the quick tutorial instructions doesn't work for me, since there is no "analog out" choice. Only Digital In, Digital Out, PID Loop trig, and Sequence Trig. It would be much appreciated if you could very briefly show the configuration of an Analog Out channel and the procedure to set a voltage. Maybe I am just dense, but some more brief detail would be very helpful to me (and perhaps to others). Thanks very much. Link to comment Share on other sites More sharing options...
AzeoTech Posted November 18, 2013 Share Posted November 18, 2013 I'm assuming you are using a LabJack? I say read the manual because all that you ask is in the DAQFactory LabJack application guide. Section 3.4 explains how to create an analog output channel with step by step instructions and an actual sample document. Section 4.6 explains how to create an on screen control to set the variable output. Link to comment Share on other sites More sharing options...
EA1 Posted November 18, 2013 Share Posted November 18, 2013 Thank you for pointing me to the appropriate sections. This was very helpful! Link to comment Share on other sites More sharing options...
JohnyQuick Posted September 28, 2014 Share Posted September 28, 2014 I've been trying to get the correct amps from the voltage output using an output channel. I can get the 5 volts OK but the amps is only about 50 miliamps, and not enough to run the device I want to turn on and off using channel outs. The device will operate OK using VS and GND on the Labjack U3 (both low and hi voltage models) , but there the amps is > 250 miliamps. What I want to do is set the output to 0, 5 to turn it off or on, but the amps coming from DAC0 to GND is only about 50. 5 volts sure. but not enough amps. Is there a way around this that you can think off? To get enough amps out of DAC 0 to GND to run the device? Link to comment Share on other sites More sharing options...
LabJackSupport Posted September 29, 2014 Share Posted September 29, 2014 The analog outputs on the U3 have 50 ohms of source impedance, so for example, if you set DAC0 to 4.0 volts and draw 10mA, you will lose 0.5V over the source impedance and your output will be more like 3.5V: http://labjack.com/support/u3/users-guide/appendix-a How much current do you need? On/off or variable? Link to comment Share on other sites More sharing options...
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