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I am trying to build one small project and based on the needs I need to isolate few components but also keep them connected using I2C. I was doing a research and found few DC DC isolator converters but all of them have some power range - even minimal. I need to have one 5V input which is then splited into 3.

As you can see on the picture I need to have this circuits:

  1. main module, half adum1250, half optocoupler, half adum1250, half optocoupler
  2. Blackbox1, half adum1250 and half optocoupler
  3. Blackbox1, half adum1250 and half optocoupler

Schema

This is my idea right now but I am open to new solutions to how full isolate these circuits but use same power source (5V USB), I2C communication and alert pins.

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