Choosing fixed or variable DC power suppy

Discussion in 'General Electronics Chat' started by silvija, Jun 21, 2012.

  1. silvija

    Thread Starter New Member

    Jun 21, 2012

    I am developing an application using telit module GE 864 gps, with the EVK2 evaluation kit. Being a software developer, I need a little help understanding the power supply for the motherboard. Power supply inputs on the motherboard are following:
    -5-40 V power jack
    -3.8 V wire
    -5-40 V wire
    -battery and charger
    My questions are:
    Does choosing of the power supply depends on the functionality of the module or can I choose whatever I want?
    What is the difference between fixed DC and variable DC considering functionality?

    Thanks in advance,
  2. MrChips


    Oct 2, 2009
    The board only needs one power source to operate. Which one you choose depends on the final application. For testing, use a wall adapter. Anything from 9VDC to 12VDC is very common.
    silvija likes this.