12V DC supply

Discussion in 'DC Control' started by paul_l, Dec 21, 2015.

  1. paul_l

    paul_l Staff Member Administrator

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    Here is a quick circuit diagram for a 12V supply

    [​IMG]

    Paul
     
  2. paul_l

    paul_l Staff Member Administrator

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    Alternatively, you can use a PC power supply.

    Two main types available AT (old) & ATX.

    I would not recommend the AT power supplies as they normally have an external mains switch.
    The ATX power supplies keep the mains within the box.
    They are fitted with either a 20 or 24 way connector

    [​IMG]
    The colour coding on the above diagram normally corresponds with the wire colours, although I have seen different wire colours used !!!
    To get the supply to work connect the PS_ON# wire to COMMON. If you do this via an off / on switch you can have a remote off/on switch. Note just like a PC, it will consume some power while in standby mode.

    The +12V DC, +5V DC and +3.3V DC lines will provide significant amounts of current, and may be advisable to install current protection for the circuit.

    For example

    http://www.amazon.co.uk/gp/product/B00P2GE38C?keywords=atx%20psu&qid=1450616476&ref_=sr_1_7&sr=8-7

    Provides the following output currents

    +3.3V 26A; +5V 27A;+12V 22A

    Paul
     

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