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output on drdaq

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output on drdaq

Postby nodrog » Sun Oct 26, 2003 4:07 pm

does the software supplied allow the inputs to control the output e.g. the p.H. level rises too high the output can be used to contol a pump to level out the p.H. (closed loop feedback).
nodrog
 

Postby markspencer » Mon Oct 27, 2003 8:57 am

Hi,

It is not possible to control the digital output through Picolog or Picoscope, however, this is possible if you were to write your own software. The voltage that can be recieved through the DO is in the range 3-5 volts depending on the PC. The maximum current draw is about 2 mA, trying to draw to much current could have an adverse effect on your PC. It would be better to use the DO as a trigger which would switch something on rather than power/drive an external device.

Best regards,
Regards,

Mark Spencer
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Related Question

Postby Guest » Fri Nov 14, 2003 6:53 pm

Sorry to butt in on your thread. :) But I am considering purchasing th Dr Daq to do something similar to what youre require e.g. control a motor when ph is too high or low...

Is there any avliable software to do this on the DRDAQ device?


Thanks
Guest
 

Postby markspencer » Mon Nov 17, 2003 8:18 am

Hi,

Unfortunately, there is nothing in the software that will allow you to control the motor through Picolog/Picoscope.

However, it might be possible to do it by writing your own software and using the digital out to trigger a relay.

Best regards,
Regards,

Mark Spencer
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