Powering V0.5 with >12V

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This topic contains 3 replies, has 3 voices, and was last updated by Profile photo of DaveE DaveE 2 weeks, 5 days ago.

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  • #2204
    Profile photo of DaveE
    DaveE
    Participant

    Will I fry my shiny new v.5 Mayfly if I power it with more than 12V? The specs indicate 4-12, but during the day my battery voltage often tops out around 14 or so. Will this be a problem?

    Thanks!
    Dave

  • #2205

    DaveE, No problem! The circuitry is designed for 12V batteries and can handle up to 15V or so to accommodate for a fully charged lead-acid batter. We just didn’t want anyone to daisy-chain a pile of other batter types much beyond 12V, which is why we listed 12V.
    We hope to be providing full documentation on the new v.5 Mayfly boards soon!

  • #2208
    Profile photo of Shannon Hicks
    Shannon Hicks
    Keymaster

    That’s a good question, thanks for asking: The new v0.5 board will handle an absolute maximum input voltage of 16v, so you should be okay. The 12v limit is the maximum “recommended” voltage. A charger for a 12v battery will output 13 or 14v, but it’s still safe to use that with the Mayfly (version 0.5 only). The older v0.3 and v0.4 boards get way too hot if you put more than 6v on the external input because the onboard solar charging regulator has a max input of 7v. The switch on the new v0.5 disconnects the charging regulator as well as protects the USB port (and your computer) from any accidental overvoltage coming from the external source.

  • #2209
    Profile photo of DaveE
    DaveE
    Participant

    Great! Thanks for such prompt responses.

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