Viewing 9 posts - 1 through 9 (of 9 total)
  • 12v to 9v converter
  • captainsasquatch
    Free Member

    I bought one of these DAB radios today, but want to run it from a 12v supply in the camper. (Stupid long urls!)

    This is what I need, I think, but where can I get one from in the UK?

    Cougar
    Full Member

    From what I remember of my GCSE Electronics would suggest you need a Potential Divider.

    https://en.wikipedia.org/wiki/Voltage_divider

    Two resistors, total cost about three pence.

    leffeboy
    Full Member

    That only works if you also know how much current the radio takes, which will change 🙁

    Looks like this sort of thing but you need to check the power raying

    m0rk
    Free Member

    ^^ or a voltage regulator if the output voltage is a bit more sensitive (12V from a car can be 14.4 on a good day, and quite messy)

    captainsasquatch
    Free Member

    That’s the ticket Leffeboy, cheers.
    I have no idea what everyone else is talking about which is why that although thruppence is cheap enough I’m happy to pay a tenner for someone else to put it together. 😀

    zzrmatt
    Free Member

    From what I remember of my GCSE Electronics would suggest you need a Potential Divider.
    https://en.wikipedia.org/wiki/Voltage_divider

    Two resistors, total cost about three pence.

    As above they only really work when you need to divide the voltage for something that takes no current and are fed from a fixed voltage supply.

    I have used these buck converter boards for doing similar. Again you would need to check the required output current.

    http://www.ebay.co.uk/itm/262367320918

    I can’t even buy the parts to make them in the uk for that price which is rather annoying…

    Cougar
    Full Member

    I’ve a vague handle on electronics but I do so wish it was better. I’m not silly, but I follow a retro computing group on Facebook and the skill of the guys doing repairs on there just breaks my head.

    Cougar
    Full Member

    I’ve a vague handle on electronics but I do so wish it was better. I’m not silly, but I follow a retro computing group on Facebook and the skill of the guys doing repairs on there just breaks my head.

    nickjb
    Free Member

    Maplin sell the car adapters if you want to go in a shop.

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