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power adapter problem

Discussion in 'Electronic Design' started by davit, Dec 8, 2003.

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  1. davit

    davit Guest

    Is this possible?
    I have a device that normally runs from a car cigarette lighter socket. One
    end is a male car lighter socket jack..the other end is a 12 mm diameter 4
    pin connector. In the middle of the cable is a small 2 button control pad.
    Can an adapter be made so i can go straight from mains to the device to
    include the control pad?
    All the 240 V ac/dc adapters i've seen in the last 2 days of searching are
    the single pin or wheel spoke adapters for calculators and the like. I need
    4 pin. Any ideas?
    cheers for any help
    Grongen
     
  2. Ian Stirling

    Ian Stirling Guest

    Where are you?

    http://www.ebuyer.com/ has car lighter sockets for PCs, http://www.cpc.co.uk/
    sells plug-in AC car lighter adaptors, ...
     
  3. I read in sci.electronics.design that davit <>
    If you use a 12 V regulated 'adapter', you can cut off the connector at
    the end of the 12 V output cable and add a *female* cigar lighter
    socket, into which you just plug your existing cable. Make sure that the
    positive of the 12 V supply goes to the centre contact of the new
    connector.

    I don't know which country you are in, so I can't suggest where you can
    get the female connector, but they are available from hobby component
    suppliers in Britain.
     
  4. davit

    davit Guest

    Hi guys thanks for the replies but i don't think i can make myself
    understood very well. Sorry electricity just ain't my bag!
    At the moment the schema is like this. Car battery---female socket----male
    jack--cable---control pad---12mm 4pin female socket---male 4 pin socket in
    device.

    I also have my 'portable' schema thus...stand alone car battery 12v
    DC---croc clips into female lighter socket---male lighter
    jack------cable----control pad----12mm female 4 pin socket---male 12mm 4 pin
    socket.

    I want to be able to do away with the battery option and go from mains UK to
    12v DC device.
    The device has a male 4 pin socket in it this is my problem....i think!

    thanks agin
     
  5. I read in sci.electronics.design that davit <>
    You said you wanted to keep the control pad in the system. Therefore,
    you need only connect your 12 V DC supply to your female lighter socket
    in place of the car battery. BUT don't use croc clips! The danger of a
    short-circuit is very high, and if you short the battery you will get
    smoke and flames.

    This is still the best way for you to do it, even if you DON'T want to
    keep the control pad. Those 4-contact connectors used to be available in
    Britain, because they were used for CB radio microphones, but I don't
    think they are now.
     
  6. davit

    davit Guest

    ">
    Hi John, thanks for the info.

    Can't i just cut the lighter socket jack off the end of the cable and put a
    15amp 3 pin plug on it? Or will i die if i do that 8 ' )
    Gron..could be gone if i mess this up!!!
     


  7. You have to be winding us up !!!
     
  8. I read in sci.electronics.design that davit <>
    Absolutely NOT. You car battery provides 12 volts, but the mains supply
    is 230 volts.
    You stand a fair chance of serious injury, and the equipment will be
    damaged beyond repair.
     
  9. I read in sci.electronics.design that Rheilly Phoull
    Yes, he'd do well to stick to clockwork.(;-)
     
  10. davit

    davit Guest

    So how can i make a cable with correct connections and or adapters to power
    my device from the mains?
     
  11. Ian Stirling

    Ian Stirling Guest

    Where are you.
    They are inexpensive to buy.
     
  12. I read in sci.electronics.design that davit <>
    I told you earlier today:

    You said you wanted to keep the control pad in the system. Therefore,
    you need only connect your 12 V DC supply to your female lighter socket
    in place of the car battery. BUT don't use croc clips! The danger of a
    short-circuit is very high, and if you short the battery you will get
    smoke and flames.

    This is still the best way for you to do it, even if you DON'T want to
    keep the control pad. Those 4-contact connectors used to be available in
    Britain, because they were used for CB radio microphones, but I don't
    think they are now.
     
  13. davit

    davit Guest

    Hi Ian i'm in UK.
    The post below " says connect to your 12v DC supply" but i don't know what a
    12V dc supply is appart from a battery and i don't want to use a battery I
    want to use mains power simply because a battery is not always suitable to
    carry around.
    Gron
     
  14. Ian Stirling

    Ian Stirling Guest

    http://www.maplin.co.uk/
    N35AZ is an order code that might suit.
    Plugs into the mains, and you can then plug a cigarette lighter plug into
    it.
    They also have lots of stuff on offer that may be of interest.
     
  15. davit

    davit Guest

    Hi Ian thanks for your time and trouble in pointing me in the right
    direction.
    This is exactly the kind of thing i need. I now know what to look for. My
    device i have found out is 15amp rated.
    thanks agin Ian
    Gron
     
  16. I read in sci.electronics.design that davit <>
    NO! You are right back in the fertilizer. We thought you had some small
    piece of kit to make work. You cannot get a plug-in power supply that
    will give 15 A at 12 V. You can get a mains power supply that will do
    that but it is much bigger. Waters and Stanton sell them for radio
    amateurs.

    mailto:
     
  17. Ian Stirling

    Ian Stirling Guest

    It might be helpfull at this time for davit to mention what the device is.
    There may be other ways.
     
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