/diy/ - Do It Yourself

Anonymous Tue Jun 11 03:33:11 2019 No.1627444 [View]
File: 32 KB, 999x414, currentreg2.png [View same] [iqdb] [saucenao] [google]

I had a thread up earlier about this but don't want to start a new one for this question. I got the parts for this and when putting it together I can't figure out how to connect the potentiometer properly. It's supposed to be able to adjust current from 3.7ma - 31ma accroding to: min current = 1.25/R1 and Max current=1+(R3/R2)*min. current.
I've tried just about every combination and the closest I could get was when I jumpered the input pin of the potentiometer to the vout of the IC and resistor block. I could only get it to limit from 6ma-24ma, if I use just the potentiometer I can push the lowest current the IC can handle, which is 3.5ma. What am I doing wrong?

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/diy/ - Do It Yourself

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