To JasonHarper,
Thank you for your response. You are the first to confirm my suspicions. I am a plumber way in over his head…you provided a part # for the regulator, so how about the resistor? Infinite down to 37 ohms…does that mean anything? Some one suggested a fixed resistor (4200 ohms) in series with a variable resistor (13000 ohms). I almost understand this, but I would have to adjust the pot by hand as the current climbs. Your solution sounds automatic…which is what I am after. I believe the resistor size would be 0.25 watts. But I don’t know what it all means if I use a voltage regulator. Theory and sequence I mean. One more thought, which I don’t understand, is using a transistor and a FET in drain mode with 2 of the FET legs shorted. I was told that is how to “build” a constant current diode. What would you do? Note: A week ago, I didnt know what a milli amp was.
Thanks again, plumber