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24vdc to 12vdc for remote deployment

Discussion in 'Electronic Basics' started by [email protected], Jan 24, 2005.

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  1. Guest

    My first post so excuse me if I sound a bit basic-I have a 12vdc comms
    device that I want to put in a remote cabinet.The cabinet has
    24vdc.The device will draw 750mA to 1000mA at most-the specs say 9
    watts power for the device.
    Space is a preminium so I'm looking for 2 things
    1) how to get from 24v to 12v
    2) how small can be it, either in unit or PCB form, as to not vastly
    increase the footprint of the original device-which is currently 10cm
    by 13cm.I've been doing a bit of Googling and it looks like I need a
    7812 stabaliser-is this correct and what else do I need for the
    "complete" unit?


  2. For that power, you should be looking for a DC-DC converter (switching
    power supply), rather than a linear voltage regulator like the 7812.

    For example, see

    Peter Bennett, VE7CEI
    peterbb4 (at)
    new newsgroup users info :
    GPS and NMEA info:
    Vancouver Power Squadron:
  3. They are a bit pricey, but this would do it: One Web Data/LES Series - 15 Watt.pdf

    They are available from Digikey for about $70.
  4. cabsandy

    cabsandy Guest

  5. I assume a car regulator uses 12 volts (or a bit more) on its input
    side, so it wouldn't work for a 24 volt input. I can't see the data
    sheet without a user name and password.
  6. James Beck

    James Beck Guest

    They do a 12VDC version of it, but you have to ask for it.

  7. cabsandy

    cabsandy Guest

    Sorry-I forgot you had to register for this site.On the packaging is
    says 12-24vdc input with the option of a 3-12vdc output (in 1.5v

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