OpenSprinkler Forums OpenSprinkler Unified Firmware I have a few questions

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  • #83560

    Mister
    Spectator

    1) When wiring Open Sprinkler Latch to a 12v DC fuse box for a power source, are there wire terminals on the Open Sprinkler Latch, or do I need to use a DC power barrel plug pigtail to connect to the Latch?

    2) In some of the older manuals I see a Latch on/off maximum voltage with talk about a booster. So is that a step up/down transformer or just a step up transformer? I know there is a maximum voltage of 24v, but is there a minimum voltage? I have a 12v DC power supply from solar, but DC latching solenoids come in 9v to 24v. If 12v is supplied to the Open Sprinkler Latch will it step down to provide 9v to said solenoids if used or should I just use 12v+ solenoids when providing 12v power to the Open Sprinkler Latch.

    3) When creating irrigation programs can I define a start time of say 6 AM with a stop time of say 9 PM (15 hours total), 7 days a week to come on intermittently every 10 minutes for 10 seconds so that I can run a mister for plant cutting propagation tables. The FAQs seems to infer that repeating start times can be used, but the FAQs say you can only repeat 8 times before the program ends. Starting every 10 minutes for 15 hours would be 90 repeats per day, so does that mean I have to use 12 separate programs to complete the task for the day or is it more flexible than the FAQs state allowing for any user defined integer for number of repeats?

    #83566

    Ray
    Keymaster

    1) If the power source has 2 wires, you need a DC power barrel plug pigtail as you said, to connect to the controller, because it only has a DC power barrel input.

    2) The controller has internal voltage booster (step-up) and the boosted voltage is adjustable in software (from the input voltage up to 24V max). There is NO step-down because the voltage booster can only boost voltage, cannot drop voltage. So if your input is 12V, you can only set the boosted voltage above 12V (up to 24V), if you set it to 9V, it will do nothing and will not drop to 9V. You can use an external voltage regulator (or simply a series of diodes) to drop the power source to a lower voltage. Most latching solenoids are very forgiving and can work with a wide range of voltages. 9V is convenient because they can be powered by 9V battery, but most of them work just fine with 12V as well.

    3) Where in the FAQ did you see that it can only repeat 8 times? The repeat time is not capped anywhere. You can set the program to repeat 8 times or 80 times, there is no limit.

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OpenSprinkler Forums OpenSprinkler Unified Firmware I have a few questions