technogeek
New Member
How would you control multiple adjustable voltage regulators with one potentiometer? Can it be done?
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technogeek said:How would you control multiple adjustable voltage regulators with one potentiometer? Can it be done?
What voltages do you want?technogeek said:How would you control multiple adjustable voltage regulators with one potentiometer? Can it be done?
Well, if you want any help here, you need to define what you need.technogeek said:actually I need adjustable currents, 1-5ma.
maximum 12 volts.
I'm starting to think a current mirror might be a better idea, but I need precision over a large range of operating temps and load swings.
technogeek said:Okay, lets start over.
I have 6 outputs that need exactly the same current (currently using 6 regulators and 6 pots). Power supply is 12 volts. The output current will range from 1-5ma, and I need to set that output with a pot. If I change the pot setting and the output is 4.9ma, I need the rest of the outputs to be exactly 4.9ma. 5ma might be okay, but no more variance than that. It needs to be stable. I can't set it to 5ma and have it drift around to 4 or 10ma just because the components heat up to 100F or cool to 60F. Suggestions?
Leftyretro said:Two 14 pin op amps chips (8 op amps total), one pot and a bunch of resistors and a few caps for bypassing should do fine.
Lefty