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OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Modifying OsPi 1.43+ to support SN2

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  • August 22, 2021 at 3:16 am #70954

    DarcyW
    Participant

    Hi all, is there a simple guide on how to modify the 1.43+ PCB to support an SN2 please? A bit of a hunt hasn’t revealed whether the needed pin is exposed on this PCB revision.

    And to hijack that… If I have a flow sensor with the below specs, are there any thoughts on whether this equates to “5 pulses per litre”? The “per minute” is just annoying… but I’m hoping that logic holds.
    Flow rate :1~60 L/min
    Flow Pulse: F(Hz)=(5.0xQ) -3% Q=L/min

    August 22, 2021 at 3:28 am #70955

    DarcyW
    Participant

    Okay… So at 20 L/min, the Flow Pulse Frequency would be (5.0 x 20) Hz, x 60 for pulses per minute, = 6000. So, 20,000 mL / 6000 = 3.333 mL per pulse, or 300 pulses per litre.

    Does that seem right?

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OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Modifying OsPi 1.43+ to support SN2