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op amps

if anyone has worked with lab power supplies, since I am thinking of building one that is op- amp friendly
what I would like to know is when you turn the knob to adjust voltage on the positive rail its clockwise to increase, right?

but on the negative rail is it clockwise to decrease, in other words as you turn the dial the output voltage gets more negative with respect to ground and magnitude increases.

which way should you turn?

I know not really prop related but thought it wouldn’t hurt to try. Which way would you prefer?

Comments

  • evanhevanh Posts: 13,558
    edited 2022-05-03 01:16

    Sure, but not usually something that is encounter in practice. A split rail output for op-amps is usually a single adjustment, if adjustable at all. Mostly just have such as a fixed low-current auxiliary output.
    When a lab power supply is designed with two adjustable voltages, the two associated outputs are usually isolated from each other. They can be switched between independent, slave-paralleled, or slave-seriesed. Slave-seriesed would produce the same config as the fixed auxiliary output.

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