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4-20ma valve control with PIC
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otuzsubat



Joined: 07 Jun 2004
Posts: 45
Helped: 2
Location: istanbul, Turkey
Post04 Mar 2005 23:04   

pic 4-20ma
I want to control a valve with PIC microcontroller. The valve can be controlled by 4-20mA signal. I think the shema below is suitable. Before complete design, i need your ideas. Is there any easier way to succeed this? What could you suggest me?
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IanP



Joined: 05 Oct 2004
Posts: 6492
Helped: 1542
Location: West Coast
Post05 Mar 2005 0:19   

4-20ma with a pic microcontroller
Another option is to use dedicated 4-20mA current generators:
http://www.datasheetarchive.com/datasheet/pdf/5370.html
Instead of using ADC+V/I converters you can use digital potentiometer + one of these circuits .. but that is just another option ..
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