OpenSprinkler Forums Hardware Questions OpenSprinkler power flow sensor from input power

  • This topic has 1 reply, 2 voices, and was last updated 4 months ago by Ray.
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  • #70446

    eyals
    Participant

    Hi Ray
    I have this flow sensor which require 7V operation voltage.
    https://www.aliexpress.com/item/32970615307.html?spm=a2g0s.9042311.0.0.153e4c4dxNH9pM
    Can I connect the red wire of the sensor to the input source of the V3 controller (9V DC), instead to the VIN, and the black wire to GND?
    Thanks
    Eyal

    #70481

    Ray
    Keymaster

    I would not recommend this, because a sensor with 7V operating voltage means its output is also usually at that voltage level, which is above the controller’s operating voltage. If you have to use this sensor, I suggest that you either use a resistor voltage divider, or a resistor plus a zener diode to reduce the output voltage down to 5V, which is safe for the controller’s sensor pin.

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OpenSprinkler Forums Hardware Questions OpenSprinkler power flow sensor from input power