What exactly is this 5v relay used for in the diagram on the bottom right next to the bargraph? Thanks!

[MikeS11]

It's used for an expandable smoke kit and triggers a relay to power it's operation.

On Tue, Sep 7, 2021, 12:50 PM ytineres @.***> wrote:

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[ytineres]

Thanks so much! saves me a step of adding it in later.