Wemos D1 & Relay shield

  • Hi everyone,

    For one of my hobby projects I would like to control 24V (19W) mist maker using Wemos D1 and Relay shield.

    This is my current wiring:
    Wemos D1 wiring

    Is it OK to connect grounding of mist maker and Wemos together? With other words - should I have two power supplies in order to decouple the wiring for some reason?

    Thanks for any helpful feedback in advance.

  • @primosk

    This looks like it should work, but I'd use a large electrolytic capacitor (e.g. 1000uf) across the 5V and Gnd connections to the D1 Mini. Those switching power supplies can have a lot of ripple.

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