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Thread: Convert 12 volts to 5 volts

  1. #1

    Convert 12 volts to 5 volts

    I would like to find a source for a electronic gizmo which will drop voltage from 12 to 5 volts.I saw one as an aftermarket on a K16 this summer at a rally. It was connected directly to the battery and the gizmo was the size of a relay with a 4ft lead running from it to connect to a device.
    Presently i have a converter connected to my SAE 2 pin plug but would like to keep this connection for a heated vest, etc.

    What i would like is the gizmo to be connected to my secondary fuse panel so when i turn on the moto, power is supplied to the gizmo. TIA

  2. #2
    There are several examples available on Amazon, a 12Vdc to 5Vdc converter rated for 3 Amps can be had for under $20.

  3. #3
    Registered User
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    Bill,

    If you connect such a device directly to the battery, it will probably draw current even when nothing is connected to the 5 V side since the voltage conversion circuit runs continuously. If you do install it, check the current draw with everything shut down so you don't wind up with a dead battery.
    Karl
    2007 R1200ST

  4. #4
    Registered User lkraus's Avatar
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    Quote Originally Posted by kthutchinson View Post
    Bill,

    If you connect such a device directly to the battery, it will probably draw current even when nothing is connected to the 5 V side since the voltage conversion circuit runs continuously. If you do install it, check the current draw with everything shut down so you don't wind up with a dead battery.
    That's a legitimate concern, and should be checked. But FWIW, I had a cheap USB connection wired directly to the battery for a few years that drew no measurable current unless my phone was plugged in. I checked it several times with three different mA meters, could not measure any current, never saw any reduction in starting power.
    Larry
    2006 R1200RT

  5. #5
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    What are you powering with it? Tons of 12 volt to USB cables on Amazon. Pretty inexpensive too. I bought one to power a Garmin GPS but it didn't work and found a Garmin cable that worked.
    From the only real Fargo, ND!

  6. #6
    Registered User 36654's Avatar
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    Quote Originally Posted by PoorUB View Post
    What are you powering with it? Tons of 12 volt to USB cables on Amazon. Pretty inexpensive too. I bought one to power a Garmin GPS but it didn't work and found a Garmin cable that worked.
    Battery tender has a USB port that connects to a SAE pigtail. Amp rating 2.1

    https://www.amazon.com/Battery-Tende.../dp/B00DJ5KEF4
    Cave contents: 16 R12RS, 13 Toyota Tacoma, 03 Simplicity Legacy, 97 Stihl FS75, Dewalt DW625 & SawStop PCS175
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  7. #7
    Quote Originally Posted by kthutchinson View Post
    Bill,

    If you connect such a device directly to the battery, it will probably draw current even when nothing is connected to the 5 V side since the voltage conversion circuit runs continuously. If you do install it, check the current draw with everything shut down so you don't wind up with a dead battery.

    When the time comes to make connections, I have a spare switched fuse panel (which I installed with a relay) which I will connect the converter to, so there will be no power to the converter when the RS is turned OFF.

  8. #8

    12 volt converter to 5 volts

    Thanks for the replies. I will do some searching on Amazon.

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