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Subject: Re: 4-20 mA Potentiometer Scale
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Date: 09/07/03 at 8:16 PM
Posted by: Shyam
In Reply to: Re: 4-20 mA Potentiometer Scale posted by Fahim Baig on 06/04/03 at 4:13 AM:
I agree with Fahim. 4-20mA is a current source independent of the voltage within specified range of voltage. You can get 3 such parts free for asking from www.ti.com/ part numbers are XTR101 XTR110 etc.
You can also use a regulator LM78L05 with a variable resistance to generate a constant current source between 1mA to 100mA at a very low cost.
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