Hi,
having multiple DC outputs
what is "multiple"? 2? 10? 100?
I tried looking for some methods but all of them are for high voltages,
They are for high "isolation voltage" or high "measurement voltage range"?
each output "fixed" voltage or "variable" voltage?
Analog? max error? frequency response?
Digital? accuracy? Resolution? sampling frequency? Interface?
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There are so many solutions. Nothing new. Done million times. Many solutions in the internet.
Most we can suggest can also be found in the internet.
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We dont know your requirement.
I´ve done many different types. It could be
* duty_cycle generator --> optocoupler --> PWM_input
* analog isolation amplifiers
* high impedance measurement
* ADC --> SPI --> optocoupler --> microcontroller
* analog optocoupler solutions
* signal transformers
* digital isolators instead of digital optocouplers
* inductive coupling
* ready to buy isolating measurement
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Klaus