I am designing a Digital Logic Board and need to add a DC signal output from 0 to 5V (with potentiometer) with a constant 10mA. I have checked designs with LM317 and LM334 for adjustable current upto 10mA, but no results. Can someone please provide an easy to understand schematic as i m not very good at analog designs?
Update due to comments:
I'm trying to control a DC output voltage from 0 to 5V, with a simple potentiometer 5kohms, using voltage divider. Then i am using a 520 Ohm Resistor to limit the current to 10mA (R=U/I -> 5/0.01 = 500ohm -> available 520ohm). So when the the potentiometer is on 0, the output is 5V and current limited to 10mA, but when the ratio changes, the voltage will drop to reach 0mA, and the current with also drop proportionally. My question is, are there a solution where I can get constant 10mA regardless of the outputed voltage?
The Digital Logic Board I m trying to make is a simplified version of this one http://hps-systemtechnik.com/wp-content/uploads/content/english/3910.pdf, and the DC output i m trying to make is this one: