Buy an AC/DC converter

Discussion in 'The Projects Forum' started by nathomas, Apr 22, 2011.

  1. nathomas

    Thread Starter Member

    Mar 3, 2011
    82
    0
    My requirements:
    Input - 220V AC
    Output - +-12V
    Output amp - more than .5A
    Not too expensive (less than $30) and it has to be small. Smaller than 2'x2'x1'.
    Has to be hidden so cannot use an external adapter.
    Any recommendations? Right now I have the Recom RAC15 12VDA which is too big and expensive.
    Thanks.
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,087
    3,026
    Take a look at firewire adaptors, for instance old iPod chargers. They might fit. Standard FW power is 12v.
     
    nathomas likes this.
  3. nathomas

    Thread Starter Member

    Mar 3, 2011
    82
    0
    Do you know how they make the really small ac/dc converters without the coil based system. and why are they so expensive?
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,087
    3,026
    The transformer-less chargers are SMPS (switch-mode power supply). They're more complex than a transformer, and mostly expensive because of that and because they're newer. The old-fashioned transformer types are soon to become obsolete, I believe, due to laws requiring the higher SMPS efficiency.
     
Loading...